CN101582958A - Method and device for ring-current power management in communication equipment - Google Patents

Method and device for ring-current power management in communication equipment Download PDF

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Publication number
CN101582958A
CN101582958A CNA2008100372901A CN200810037290A CN101582958A CN 101582958 A CN101582958 A CN 101582958A CN A2008100372901 A CNA2008100372901 A CN A2008100372901A CN 200810037290 A CN200810037290 A CN 200810037290A CN 101582958 A CN101582958 A CN 101582958A
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China
Prior art keywords
ringing
current
current power
new
ring
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CNA2008100372901A
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CN101582958B (en
Inventor
迮超
陈力军
张西利
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Nokia Shanghai Bell Co Ltd
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BEIER AERKATE Co Ltd SHANGHAI
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Abstract

The invention provides a method and a device for ring-current power management in communication equipment. In the communication equipment which needs to provide ring current for a user terminal, whether the ring-current power required by a new request is lower than or equal to the ring-current power remained from a ring-current source for distributing the ring-current power or not is firstly judged after the new calling ring-current request is received; and if the required ring-current power is less than or equal to the ring-current power remained from the ring-current source, the required ring-current power is distributed to the new ring-current requests. The invention can enable the ring-current source of the communication equipment to support larger simultaneous ringing numbers, improves the operation performance of the system and reduces the design cost of the system.

Description

A kind of method and apparatus that in communication equipment, is used for ring-current power management
Technical field
The present invention relates to be connected with the communication equipment of subscriber line circuit loop, particularly a kind of method of ring-current power management and device thereof.
Background technology
In existing communication system, as shown in Figure 1a, if user terminal is connected with system equipment by the subscriber line circuit loop, then, often do not require that user terminal must provide the power supply that makes its ring separately, provides ringing-current and change by system equipment by the subscriber line circuit loop in order to simplify the design of subscriber terminal side, make it produce ring, than in the communication system as shown in Figure 1a, subscriber connecting equipment can make it that ring take place by local loop for called user terminal 111 provides ringing-current.Fig. 1 b has shown the analog line interface board (being a kind of implementation of subscriber connecting equipment among Fig. 1 a) of existing stored-program control exchange, comprising a plurality of Subscriber Line Interface Circuit (SLIC, Subscriber LineInterface Circuits).Usually, in this analog line Design of Interface Circuit, for the design of simplifying the peripheral ringing-current source that is connected with this analog line circuit interface board with reduce cost, adopt a plurality of SLIC to share a ringing-current source usually.Shown in Fig. 1 b, n Subscriber Line Interface Circuit shared a ringing-current source.
And consider in system's actual moving process, the probability that ring takes place a plurality of user terminals that are connected with same ringing-current source by the subscriber line circuit loop simultaneously is very little, therefore when system design, the power that is disposed for the ringing-current source can not make all user terminal generation rings that are attached thereto simultaneously, promptly as shown in Fig. 1 b, the maximum number of ring simultaneously that the ringing-current source can be supported will be much smaller than n.
In addition, because each user terminal and the physical parameters such as distance that are attached thereto between the communication equipment that connects have nothing in common with each other, therefore make the needed ringing-current power of each user terminal generation ring also have nothing in common with each other.In the prior art, communication equipment can suppose that the needed ringing-current power of each user terminal is all identical, and all consumes maximum ringing-current power P MaxLike this, if the gross output in ringing-current source is P, then this ringing-current source can make the number of user terminal ring simultaneously may be calculated M Max=[P/P Max], operator [] expression rounds downwards.Therefore, in the prior art, if the ringing-current source has been M MaxIndividual user terminal provides ringing-current, receives this moment to distribute new ringing-current application again, and then no matter whether the residue ringing-current power in ringing-current source enough makes the user terminal generation ring of new application, and refusal should new application without exception.
And in the actual motion, be not that each terminal use needs to consume maximum ringing-current power P Max, therefore working as the ringing-current source is M MaxWhen individual user terminal provides ringing-current, often also have enough residue ringing-current power to make more user terminal that ringing-current power is provided.Because the M of the maximum user terminal number of being scheduled to MaxRestriction, this part dump power just has been wasted usually.
Summary of the invention
The present invention seeks to solving above-mentioned technical problem of the prior art, and a kind of technical scheme that is used for ring-current power management in communication equipment has been proposed, communication equipment is when receiving new ringing-current application, calculate the ringing-current power of each user terminal actual consumption, and judge whether and to distribute ringing-current power for new ringing-current application according to the current residue ringing-current power in ringing-current source.
According to a first aspect of the invention, a kind of method that is used for ring-current power management in communication equipment is provided, after the communication equipment of being in charge of the ringing-current source power receives the new ringing-current application of an incoming call, judge earlier whether the required ringing-current power of this new application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into it; If its required ringing-current power is less than or equal to the remaining ringing-current power in corresponding ringing-current source, then be that this new ringing-current application distributes its required ringing-current power.
According to another aspect of the present invention, provide a kind of management devices that is used for ring-current power management in communication equipment, this device comprises receiving system, is used to receive the new ringing-current application of an incoming call; And judgment means, be used to judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application; And distributor, be less than or equal to the remaining ringing-current power in described ringing-current source if be used for the required ringing-current power of described new ringing-current application, then distribute required ringing-current power for described new ringing-current application.
Compared with prior art, the present invention has the following advantages:
1. under same system configuration, as dispose identical ringing-current source power, by the present invention, can so that system when operation, obtain bigger in the ring number, can make more user terminal that ring takes place simultaneously;
2. by the present invention, can so that the situation that failure takes place to distribute when distributing ringing-current communication equipment still less, if promptly current do not have enough ringing-current power can supply to distribute, then wait for certain hour earlier, if having ringing-current power to discharge in the period at this section takes place, judged whether enough ringing-current power division so again, taken place to make the situation of whole call failure with regard to having reduced like this, thereby improve systematic function because of ringing-current distributes failure;
3. by the present invention, ring number identical the time can be the littler ringing-current power of system configuration when system design, thereby reduce the system design cost in order to satisfy.
Description of drawings
Fig. 1 a has shown the communication system of the telecommunication circuit that comprises wired subscriber line circuit loop;
Fig. 1 b has shown the circuit block diagram that each Subscriber Line Interface Circuit ringing-current in the analog line interface board of existing switch is shared;
Fig. 2 has shown the method flow diagram of managing ringing-current power according to a specific embodiment of the present invention in communication equipment;
Fig. 3 has shown that another embodiment according to the present invention manages the method flow diagram of ringing-current in communication equipment;
Fig. 4 has shown the device block diagram of managing ringing-current power according to a specific embodiment of the present invention in communication equipment;
Fig. 5 has shown that another embodiment according to the present invention manages the device block diagram of ringing-current power in communication equipment.
Embodiment
Below by several specific embodiments the technical scheme that the present invention relates to is described in further detail.
Embodiment one
Fig. 2 has shown the method flow diagram of managing ringing-current power according to a specific embodiment of the present invention in communication equipment.Following with reference to Fig. 2 and in conjunction with Fig. 1 a, the method that is used for ring-current power management in the switching equipment shown in Fig. 1 a is described in detail.Suppose that the call subscriber terminal 110 shown in Fig. 1 a is by local loop 140 and subscriber connecting equipment 120, make a call to called user terminal 111, switching equipment 130 is after the request that receives call subscriber terminal 110 initiations, if finding that called user terminal 111 is in can called state, then can initiate the incoming call request to called user terminal 111, and by subscriber connecting equipment 121 and local loop 141, provide ringing-current to called user terminal 111, so that ring takes place terminal called 111.Corresponding, switching equipment 130 will be as follows:
At first, in step S21, switching equipment 130 receives a new ringing-current application that distributes ringing-current for incoming call.
Secondly, in step S22, switching equipment 130 judges whether the required ringing-current power of new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application.Deterministic process comprises following dual mode at least: mode one: the size of the maximum power that current power sum that has consumed in ringing-current power that newer ringing-current application is required and ringing-current source and ringing-current source can provide; Mode two: the size of the ringing-current power that newer ringing-current application is required and the dump power in ringing-current source, wherein the dump power in the ringing-current source maximum power that can provide for the ringing-current source deducts the current power that has consumed in ringing-current source.
Particularly, switching equipment 130 can obtain the concrete ringing-current power of the needed reality of this new ringing-current application by modes such as inquiry or calculating, and obtain to be responsible for the dump power that this application is distributed the ringing-current source of ringing-current power, judge whether this ringing-current source has enough residue ringing-current power division to give this new ringing-current application.
Below to above-mentioned inquiry with calculate dual mode and describe.
Mode one: inquiry
Usually, the circuit of user terminal is fixed, thereby each parameter of subscriber line circuit loop is also fixed, the remaining ringing-current power in ringing-current source that switching equipment 130 obtains the concrete ringing-current power of the needed reality of this new ringing-current application and distributes ringing-current power for this new ringing-current application by the mode of inquiring about.Particularly, owing to fix at the circuit of user terminal, each parameter of each subscriber line circuit loop is also fixing, so the ringing-current power that each subscriber line circuit loop is consumed is also fixed, therefore, the ringing-current power parameter information that is consumed in the time of can prestoring the ring of each subscriber line circuit loop in the switching equipment 130.
Switching equipment 130 is after having received new ringing-current application, obtain the required parameter of this new ringing-current application and just at the ringing-current power parameter of other one or more subscriber line circuit loops of ring according to the power parameter information inquiry that prestores, each just is the current used up ringing-current power in ringing-current source in the ringing-current power sum of the subscriber line circuit loop of ring.The maximum power that common ringing-current source can provide also is to be pre-stored in the switching equipment 130.The maximum power in ringing-current source deducts the dump power that current used up ringing-current power is the ringing-current source.
Mode two: calculate
More specifically, obtain the method for the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating, comprise: the relevant parameter that obtains the subscriber line circuit loop of this new ringing-current application correspondence earlier, and then utilize these relevant parameters, calculate the ringing-current power of its required reality.More specifically, can obtain the relevant parameter of subscriber line circuit loop by the method for Single Ended Loop Testing.Wherein, in these parameters, comprise that the most important parameter of calculating required ringing-current power is the dc impedance R of subscriber line circuit loop cWith AC impedance R Ac, at ringing-current voltage alternating voltage Uac and direct voltage U cUnder the known situation, calculate direct current power P respectively cWith AC power P Ac, ringing-current power P=P during ring then c+ P Ac
More preferably, relevant test at the subscriber line circuit loop, such as Single Ended Loop Testing, can periodically carry out automatically by switching equipment 130, and the circuit parameter that is obtained is kept in the switching equipment 130, when needs use above-mentioned parameter, can in time obtain easily by the mode of inquiry.
Then, by judging, if the new required ringing-current power of ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source, execution in step S23 then, promptly the ringing-current source was for should new application distributing ringing-current power, this application success; If the new required ringing-current power of ringing-current application is higher than the remaining ringing-current power in ringing-current source, execution in step S24 then, promptly ringing-current source refusal was for should new application distributing ringing-current power, this application failure.
Need to prove, because the function of existing switching equipment 130 from strength to strength, usually in a switching equipment 130, can have and have a plurality of analog line interface boards, possible each analog line interface board has a ringing-current source, also may be the public ringing-current sources of a plurality of analog line interface boards.Described herein ringing-current source if no special instructions, all refers to distribute for new ringing-current application the ringing-current source of ringing-current power.
Need to prove in addition, though embodiment one is an example with traditional exchange equipment 130 method of ring-current power management of the present invention is illustrated, those of ordinary skill in the art will be understood that, method of the present invention is not limited to only be applied in as shown in Figure 1a the switching equipment, can also be applied to ringing-current power is specifically managed, in other communication equipment that distributes, in the communication system that comprises the subscriber line circuit loop for other, as keeping in the VoIP switch device of subscriber line circuit loop at some, for telephone terminal and do not require ringing current power source is provided separately that the present invention also all can be suitable for.
Embodiment two
Fig. 3 has shown that another embodiment according to the present invention manages the method flow diagram of ringing-current in communication equipment.In the ringing-current management method shown in this flow chart, in step S31, the communication equipment of being responsible for ring-current power management receives a new ringing-current application that distributes ringing-current for incoming call;
Secondly, in step S32, judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application, promptly particularly, can obtain the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating, and obtain to be responsible for the dump power that this application is distributed the ringing-current source of ringing-current power, judge whether this ringing-current source has enough residue ringing-current power division to give this new ringing-current application;
Particularly, obtain the method for the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating, comprise: the relevant parameter that obtains the subscriber line circuit loop of this new ringing-current application correspondence earlier, and then utilize these relevant parameters, calculate the ringing-current power of its required reality.More specifically, can obtain the relevant parameter of subscriber line circuit loop by the method for Single Ended Loop Testing.Wherein, in these parameters, comprise that the most important parameter of calculating required ringing-current power is the dc impedance R of subscriber line circuit loop cWith AC impedance R Ac
In addition, because the user that required ringing-current power is concrete with corresponding is relevant, if communication system obtains its required ringing-current power by other method in advance, and this parameter is kept in communication equipment or the relevant device as configuration parameter, then can obtains required ringing-current power by the method for inquiry.Such as Single Ended Loop Testing, can periodically carry out automatically, and the circuit parameter that is obtained is kept in the switching equipment 130 by switching equipment 130, when needs use above-mentioned parameter, can in time obtain easily by the mode of inquiry.
Then, by judging, if the new required ringing-current power of ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source, execution in step S33 then, promptly the ringing-current source was for should new application distributing ringing-current power, this application success; If the new required ringing-current power of ringing-current application is higher than the remaining ringing-current power in ringing-current source, then whether execution in step S34 promptly detects scheduled event and takes place, if detect scheduled event, and repeated execution of steps S32 then.
Concrete, this scheduled event comprises ringing-current power release event takes place in the given time.When other just the user of ring because change reasons such as subscribers feeder controlled state as called subscriber's off-hook, calling subscriber's on-hook, operator, when having discharged the ringing-current power of originally distributing to it, then get back to step S32 and rejudge this ringing-current source and whether have the ability to distribute ringing-current power for this new ringing-current application.
If detect less than scheduled event, then execution in step S35 promptly refuses this new ringing-current application.
Embodiment three
Fig. 4 has shown the device block diagram of managing ringing-current power according to a specific embodiment of the present invention in communication equipment.This ringing-current management devices 40 comprises receiving system 401, judgment means 402 and distributor 403.
Wherein, receiving system 401 is used to receive the new ringing-current application of an incoming call.
Judgment means 402, be used to judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application, promptly particularly, can obtain the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating, and obtain to be responsible for the dump power that this application is distributed the ringing-current source of ringing-current power, judge whether this ringing-current source has enough residue ringing-current power division to give this new ringing-current application.
More specifically, before judgment means 402, can also comprise parameter obtaining device, be used for obtaining the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating.The relevant parameter that parameter obtaining device at first obtains the subscriber line circuit loop of this new ringing-current application correspondence utilizes these relevant parameters then, calculates the ringing-current power of its required reality.Parameter obtaining device also may further include testing apparatus, is used for obtaining by the method for Single Ended Loop Testing the relevant parameter of subscriber line circuit loop.Wherein, in these parameters, comprise that the most important parameter of calculating required ringing-current power is the dc impedance R of subscriber line circuit loop cWith AC impedance R Ac
In addition, because the user that required ringing-current power is concrete with corresponding is relevant, if communication system obtains its required ringing-current power by other method in advance, and this parameter is kept in communication equipment or the relevant device as configuration parameter, then testing apparatus also can obtain required ringing-current power by the method for inquiry.
Distributor 403 is less than or equal to the remaining ringing-current power in ringing-current source if be used for the required ringing-current power of this new ringing-current application, then distributes required ringing-current power for this new ringing-current application.
In addition, distributor 403 also is used for, if the required ringing-current power of this new ringing-current application is higher than the remaining ringing-current power in ringing-current source, and then this new ringing-current application of refusal.
Embodiment four
Fig. 5 has shown that another embodiment according to the present invention manages the device block diagram of ringing-current power in communication equipment.This ringing-current management devices 50 comprises receiving system 501, judgment means 502 and distributor 503, and checkout gear 504 and control device 505.
Wherein, receiving system 501 is used to receive the new ringing-current application of an incoming call.
Judgment means 502, be used to judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application, promptly particularly, can obtain the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating, and obtain to be responsible for the dump power that this application is distributed the ringing-current source of ringing-current power, judge whether this ringing-current source has enough residue ringing-current power division to give this new ringing-current application.
More specifically, before judgment means 502, can also comprise parameter obtaining device, be used for obtaining the concrete ringing-current power of the needed reality of this new ringing-current application by approach such as inquiry or calculating.The relevant parameter that parameter obtaining device at first obtains the subscriber line circuit loop of this new ringing-current application correspondence utilizes these relevant parameters then, calculates the ringing-current power of its required reality.Parameter obtaining device also may further include testing apparatus, is used for obtaining by the method for Single Ended Loop Testing the relevant parameter of subscriber line circuit loop.Wherein, in these parameters, comprise that the most important parameter of calculating required ringing-current power is the dc impedance R of subscriber line circuit loop cWith AC impedance R Ac
In addition, because the user that required ringing-current power is concrete with corresponding is relevant, if communication system obtains its required ringing-current power by other method in advance, and this parameter is kept in communication equipment or the relevant device as configuration parameter, then testing apparatus also can obtain required ringing-current power by the method for inquiry.
Distributor 503 is less than or equal to the remaining ringing-current power in ringing-current source if be used for the required ringing-current power of this new ringing-current application, then distributes required ringing-current power for this new ringing-current application.
In addition, judge when judgment means 502 to draw that the required ringing-current power of this new ringing-current application is higher than the remaining ringing-current power in ringing-current source, whether then the start detection device 504, be used to detect scheduled event and take place.Wherein, this scheduled event comprises ringing-current power release event takes place in the given time.
If checkout gear 504 detects the scheduled time, then the start-up control device 505, are used to control judgment means 502 and distributor 503 and finish its above-mentioned arbitration functions and above-mentioned distribution function respectively once more.
In addition, distributor 503 also is used for, if the required ringing-current power of this new ringing-current application is higher than the remaining ringing-current power in ringing-current source, and then this new ringing-current application of refusal.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various modification or modification within the scope of the appended claims.

Claims (14)

1. a method that is used for ring-current power management in communication equipment is characterized in that, comprises step:
Receive the new ringing-current application of an incoming call;
Wherein, also comprise:
B. judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application;
If the required ringing-current power of c. described new ringing-current application is less than or equal to the remaining ringing-current power in described ringing-current source, then distribute required ringing-current power for described new ringing-current application.
2. the method for ring-current power management according to claim 1 is characterized in that, also comprises:
If the required ringing-current power of-described new ringing-current application is higher than the remaining ringing-current power in described ringing-current source, then refuse described new ringing-current application.
3. the method for ring-current power management according to claim 1 is characterized in that, also comprises:
If-describedly be higher than the remaining ringing-current power in described ringing-current source for the required ringing-current power of new ringing-current application, then detect scheduled event and whether take place;
-if described scheduled event, then repeating said steps b to c take place.
4. ring-current power management method according to claim 3 is characterized in that, described scheduled event comprises:
-ringing-current power release event takes place in the given time.
5. according to each described ring-current power management method among the claim 1-4, it is characterized in that, before described step b, also comprise the steps:
A1. obtain the relevant parameter of described new ringing-current application respective user circuit loop;
A2. based on described relevant parameter, calculating described is the required ringing-current power of described new ringing-current application.
6. ring-current power management method according to claim 5 is characterized in that, described step a1 comprises:
-obtain the relevant parameter of described new ringing-current application respective user circuit loop by Single Ended Loop Testing.
7. according to claim 5 or 6 described ring-current power management methods, it is characterized in that described relevant parameter comprises the dc impedance and the AC impedance of described subscriber line circuit loop.
8. a management devices that is used for ring-current power management in communication equipment is characterized in that, comprising:
-receiving system is used to receive the new ringing-current application of an incoming call;
Wherein, also comprise:
-judgment means is used to judge whether the required ringing-current power of described new ringing-current application is less than or equal to the remaining ringing-current power in ringing-current source that distributes ringing-current power into described new ringing-current application;
-distributor is less than or equal to the remaining ringing-current power in described ringing-current source if be used for the required ringing-current power of described new ringing-current application, then distributes required ringing-current power for described new ringing-current application.
9. the management devices that is used for ring-current power management according to claim 8 is characterized in that, described distributor also is used for:
If the required ringing-current power of-described new ringing-current application is higher than the remaining ringing-current power in described ringing-current source, then refuse described new ringing-current application.
10. the management devices that is used for ring-current power management according to claim 8 is characterized in that, also comprises:
Whether-checkout gear if be used for describedly being higher than the remaining ringing-current power in described ringing-current source for the required ringing-current power of new ringing-current application, then detect scheduled event and takes place;
-control device takes place if be used for described scheduled event, then controls described judgment means and described distributor and finishes its described deterministic process and described assigning process respectively.
11. the management devices that is used for ring-current power management according to claim 10 is characterized in that, described scheduled event comprises:
-ringing-current power release event takes place in the given time.
12. each described management devices that is used for ring-current power management is characterized in that according to Claim 8-11, also comprises before the described judgment means:
-parameter obtaining device is used to obtain the relevant parameter of described new ringing-current application respective user circuit loop;
-calculation element is used for based on described relevant parameter, and calculating described is the required ringing-current power of described new ringing-current application.
13. the management devices that is used for ring-current power management according to claim 12 is characterized in that, described parameter obtaining device comprises:
-testing apparatus: the relevant parameter that is used for obtaining described new ringing-current application respective user circuit loop by Single Ended Loop Testing.
14., it is characterized in that described relevant parameter comprises the dc impedance and the AC impedance of described subscriber line circuit loop according to claim 12 or the 13 described management devices that are used for ring-current power management.
CN2008100372901A 2008-05-12 2008-05-12 Method and device for ring-current power management in communication equipment Active CN101582958B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102035958A (en) * 2010-12-17 2011-04-27 华为技术有限公司 Plain old telephony service (POTS) call processing equipment, system and method
WO2014107972A1 (en) * 2013-01-08 2014-07-17 中兴通讯股份有限公司 Voip terminal and ringing parameter setting method therefor
CN109525742A (en) * 2019-01-04 2019-03-26 烽火通信科技股份有限公司 A kind of multi-path voice equipment ringing-current voltage intelligent adjusting method and system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1113518C (en) * 1999-03-18 2003-07-02 上海贝尔电话设备制造有限公司 User board controller for cut-in network equipment
US6735305B1 (en) * 1999-10-04 2004-05-11 Agere Systems Inc. Detection of low tip/ring currents in a line powered DAA
US6917681B2 (en) * 2002-04-01 2005-07-12 Adtran, Inc. Peak power management and active decoupling arrangement for span-powered remote terminal access platforms

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102035958A (en) * 2010-12-17 2011-04-27 华为技术有限公司 Plain old telephony service (POTS) call processing equipment, system and method
WO2014107972A1 (en) * 2013-01-08 2014-07-17 中兴通讯股份有限公司 Voip terminal and ringing parameter setting method therefor
US9369593B2 (en) 2013-01-08 2016-06-14 Zte Corporation VOIP terminal and ringing parameter setting method therefor
RU2622771C2 (en) * 2013-01-08 2017-06-20 ЗетТиИ Корпорейшн Voice transmitting terminal through the internet protocol (voip) and method for call parameter setting for such terminal
CN109525742A (en) * 2019-01-04 2019-03-26 烽火通信科技股份有限公司 A kind of multi-path voice equipment ringing-current voltage intelligent adjusting method and system

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