CN102035958A - Plain old telephony service (POTS) call processing equipment, system and method - Google Patents
Plain old telephony service (POTS) call processing equipment, system and method Download PDFInfo
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- CN102035958A CN102035958A CN2010105937120A CN201010593712A CN102035958A CN 102035958 A CN102035958 A CN 102035958A CN 2010105937120 A CN2010105937120 A CN 2010105937120A CN 201010593712 A CN201010593712 A CN 201010593712A CN 102035958 A CN102035958 A CN 102035958A
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Abstract
The embodiment of the invention discloses plain old telephony service (POTS) call processing equipment. In the system, current and voltage of a POTS system are sampled by a current sampling unit and a voltage sampling unit respectively; a sampled voltage signal is output to an amplifying unit to be amplified; the voltage signal output by the amplifying unit is converted into a corresponding digital signal; a microcontrol unit (MCU) calculates the surplus power of the POTS system according to the digital signal of an analog-digital (AD) converting unit and the rated power of the POTS system; and a call of the POTS system is processed according to the surplus power calculated by the MCU, so that the problem that the POTS system cannot operate normally due to overload protection of the POTS system when the power is too high during capacity expansion of the POTS system is solved, and the stability of the POTS system is improved.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of Plain Old Telephone Service pots call treatment facility, system, and method.
Background technology
Along with the develop rapidly of semiconductor technology, board integration is also more and more higher.Adopt following technology to realize when at present existing Plain Old Telephone Service POTS system being carried out upgrading: under the immovable situation of the power of system power supply, by changing POTS veneer plug-in card, make on onesize POTS veneer, to reach the POTS number of users at double, thereby realization is to POTS user's dilatation.
After the POTS system carried out dilatation, rated power P was constant, and the port number after this equipment dilatation increases.If after this equipment dilatation M port arranged, when then M port carried out the phone call business simultaneously, the computing formula of the realtime power P2 of this equipment was: P2=M*P1+P0; Wherein this POTS system of M value representation has M port, each single port power of P1 value representation POTS system, and the static power of P0 value representation POTS system, wherein the rated power of POTS system is P.
In realizing process of the present invention; the inventor finds that there are the following problems at least in the prior art: P does not change when power; realize dilatation by on onesize POTS equipment, increasing the POTS number of users; this just make on monolithic POTS veneer a plurality of POTS users by a plurality of ports carry out multichannel when calling out simultaneously power excessive; cause the actual power loss of this POTS system to surpass the specified maximum power dissipation of this equipment; when being P2＞P (realtime power of this equipment is greater than the rated power of this equipment); will cause the overload protection of this equipment, thereby make the POTS system normally to move.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of Plain Old Telephone Service pots call treatment facility, system; and method; power is excessive when being used for solving prior art Plain Old Telephone Service POTS system and carrying out dilatation; cause the overload protection of this POTS system; thereby cause normally operation problem of POTS system, improved the stability of POTS system.
For addressing the above problem, the embodiment of the invention provides a kind of Plain Old Telephone Service pots call treatment facility, and described equipment comprises:
Current sampling unit is used for the current conversion of system is become voltage signal, and exports described voltage signal and give amplifying unit;
The voltage sample unit is used for the voltage of system is sampled, and the voltage signal after the sampling is exported to amplifying unit;
Amplifying unit be used for the voltage signal of amplified current sampling unit output and the voltage signal of voltage sample unit output, and the voltage signal after will amplifying is respectively exported to the AD converting unit.
The analog digital A/D converting unit is used for converting the voltage signal that amplifying unit is exported to digital signal corresponding and exports to micro-control unit MCU;
Micro-control unit MCU is used for the digital signal according to the AD converting unit, and the rated power of described POTS system, calculates the dump power that obtains described POTS system;
Processing unit is used for calculating the dump power that obtains according to described MCU, and described POTS system is carried out call treatment.
A kind of Plain Old Telephone Service POTS system, described POTS system comprises: pots call treatment facility and user terminal;
Described pots call treatment facility is used for the current conversion of system is become voltage signal, first voltage signal after the output conversion; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified; Described first voltage signal after will amplifying respectively and described second voltage signal convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; According to the dump power of described POTS system, determine that described POTS system increases or cuts off described pots call;
Described user terminal links to each other with POTS equipment, is used for initiating pots call to the pots call treatment facility when the pots call treatment facility determines that described POTS system can increase pots call.
A kind of in Plain Old Telephone Service POTS system the method for call treatment, described method comprises:
The current conversion of system is become voltage signal, first voltage signal after the output conversion;
Voltage to system is sampled, second voltage signal after the output sampling;
Respectively described first voltage signal and second voltage signal are amplified;
Described first voltage signal after will amplifying respectively and described second voltage signal convert corresponding digital signal to;
According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system;
According to the dump power of described POTS system, described POTS system is carried out call treatment.
A kind of Plain Old Telephone Service POTS system, equipment that the embodiment of the invention provides, and in the POTS system method of call treatment, become voltage signal by current conversion, first voltage signal after the output conversion with system; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified, and convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; Dump power according to described POTS system; described POTS system is carried out call treatment; power is excessive when having solved Plain Old Telephone Service POTS system and carrying out dilatation; cause the overload protection of this POTS system; thereby cause normally operation problem of POTS system, improved the stability of POTS system.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below.Apparently, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of Plain Old Telephone Service pots call treatment facility that Fig. 1 provides for the embodiment of the invention;
The structural representation of a kind of Plain Old Telephone Service POTS system that Fig. 2 provides for the embodiment of the invention;
Fig. 3 for the embodiment of the invention provide a kind of in Plain Old Telephone Service POTS system the method flow diagram of call treatment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
A kind of Plain Old Telephone Service pots call treatment facility structure schematic diagram that Fig. 1 provides for the embodiment of the invention.As shown in Figure 1, the structure of the pots call treatment facility of the embodiment of the invention can comprise:
Be specially: current sampling unit can be realized its function by current sampling circuit.
Current sampling unit can pass through sampling resistor or precision current transducer, and the current conversion of this POTS system is become voltage signal.Wherein, if adopt sampling resistor, the value of voltage signal V1 after the conversion of this POTS system output can be calculated by following functional relation and obtain: the input current of this POTS system is Iin, behind this POT electric current process current sampling unit, and the functional relation below the magnitude of voltage of output satisfies:
V1＝R1*Iin
Wherein R1 is a sampling resistor, and Iin is the input current of POTS system, and this electric current, by the magnitude of voltage V1 after the above-mentioned formula calculating acquisition sampling and is imported amplifying unit with described magnitude of voltage V1 and carried out processing and amplifying through the R1 sampling resistor.
Its function can be realized by voltage sampling circuit in described voltage sample unit.
Be specially: described voltage sample unit can pass through potential-divider network or accurate voltage transducer, and system voltage is sampled, and makes to satisfy following functional relation between input voltage value and the conversion value:
V2＝Vin*A
Wherein, Vin is the input voltage of POTS system; A is the dividing potential drop coefficient, and this is worth according to the side circuit value, makes the value of the voltage signal V2 that the POTS system exports can satisfy the voltage request of device.
Amplifying unit 106 be used for the voltage signal of amplified current sampling unit output and the voltage signal of voltage sample unit output, and the voltage signal after will amplifying is respectively exported to the AD converting unit.
Described amplifying unit can be realized its function by amplifying circuit.
Be specially: described amplifying unit comprises operational amplifier, amplify by electric current, the voltage signal (being the voltage signal V1 of current sampling unit output and the voltage signal V2 of voltage sample unit output) of described operational amplifier, make that can simulated digital AD converting unit through the voltage signal after amplifying correctly discerns sampling.
AD converting unit 108 is used for converting the voltage signal that amplifying unit is exported to digital signal corresponding and exports to micro-control unit MCU.
Described AD converting unit can realize its function by A/D convertor circuit.
Be specially: described AD converting unit becomes digital signal with amplified analog signal by sample conversion, promptly, convert voltage signal V1 and voltage signal V2 to corresponding digital signal (being generally binary code), make it possible to correctly be discerned by microprocessor MCU.
In transfer process, can also guarantee that the AD sampling has accurate reference point, makes transfer process more accurate by reference power supply 110 for the AD conversion provides biasing.
Micro-control unit MCU112 is used for the digital signal according to the AD converting unit, and the rated power of described POTS system, calculates the dump power that obtains described POTS system.
Be specially: described MCU is according to the digital signal of AD converting unit output, calculates the real time power consumption P2 of present POTS system, and computing formula is as follows:
P2＝Iin*Vin＝(V2*V1)/(R1*A)
Described R1 is the sampling resistor in the power supply sampling unit, A is that dividing potential drop coefficient in the voltage sample unit is not (if having dividing potential drop coefficient and a sampling resistor, then do not need value) then, deduct the real time power consumption P2 of POTS system according to the rated disspation P of POTS system and can draw residue power consumption P3, computing formula is as follows:
P3＝P-P2
Described MCU can also be according to the power of each POTS port of dump power and described POTS system, calculates the residue call number that obtains described POTS system.This action of calculating the residue call number also can be carried out by following processing unit 112.
It is specific as follows further to calculate the residue call number:
Residue power consumption decision pots call way according to described POTS system.The calling power consumption of supposing the POTS port of each POTS equipment is P3, then can go out the calling way N that POTS can increase or needs reduce according to the residue power consumption calculation, so that the real time power consumption of the system of assurance is less than the rated disspation P of system.
N＝P3/P1
Wherein, N is the residue calls value of described POTS system, and P3 is the dump power of this POTS system, and P1 is the rated power of this POTS system.
If described MCU calculates the dump power that obtains described POTS system, then processing unit 112 is according to the dump power of described POTS, and the power of each POTS port of described POTS system, calculates the residue call number that obtains described POTS system; According to described residue call number described POTS system is carried out call treatment.
If described MCU calculates the residue call number that obtains described POTS system, then described processing unit 114 carries out call treatment according to described residue call number to described POTS system.
Wherein said processing unit 114 carries out call treatment according to described residue call number to described POTS system and specifically comprises:
(1) when P3＞0, this POTS system allows to increase the pots call of calls value N, and promptly this POTS system can increase the pots call of N road;
(2) when P3＜0, this POTS system will cut off the pots call of calls value N, and promptly this POTS system will reduce the pots call of N road.
Illustrate the course of work of pots call treatment facility below:
After the POTS system carries out the POTS dilatation, set described POTS system by being increased to by original 32 tunnel pots call after 64 tunnel pots calls, this moment, the realtime power of this POTS system was P2, the rated power of described POTS system is 60W.
If the input voltage vin of described POTS system is 10V, the input current Iin=5A of system.
Current sampling unit converts the current signal Iin of described POTS system to correspondent voltage signal V1, the functional relation below wherein input current Iin and output voltage values satisfy by sampling resistor:
V1＝R1*Iin
When the input current Iin of system is a 5A peace, selecting sampling resistor R1 for use is 0.5 ohm.This moment V1=5*0.5=2.5V.
The voltage sample unit is respectively to the voltage signal Vin of the POTS system calculating of sampling.This moment, the output voltage V 2 of voltage sample unit can be passed through following functional relation:
V2＝Vin*A
Wherein, A is the dividing potential drop coefficient, according to the value that side circuit is got A, makes the output voltage of V2 satisfy the requirement of device, gets 0.2 (specifically can realize by two electric resistance partial pressures) such as A, then this moment V2=Vin*A=10*0.2=2V.
The AD converting unit is sent to the AD converting unit respectively with the voltage sample unit of system and the voltage signal V1 and the V2 of current sampling unit output, by the AD converting unit this analog signal conversion is become digital signal, to make things convenient for MCU identification.
The V1=2.5V of above-mentioned input AD converting unit, V2=2V, if A/D convertor circuit is 8, wherein reference voltage V ref is 5V, then V1, V2 can convert following binary code W1, W2 to.
W1＝V1*255/Vref＝O127.5＝B10000000
W2＝V2*255/Vref＝O102＝B1100110
Wherein, " 255 " are the maximum numbers that 8 binary codes can be represented." O " represents 10 system numbers, and " B " represents binary number.
The MCU unit calculates realtime power P2 according to the binary code of above-mentioned conversion.Wherein represent in the decimal system: P2=V1*V2/R1*A=2.5*2/0.2*0.5=50W
The calculating of the dump power P3 of described POTS system.
P3＝P-P2＝60-50＝10W
Processing unit, according to the dump power of described POTS system, and the power of each POTS port of described POTS system, described calling is handled.
(1) when P3＞0, described processing unit allows the pots call of POTS system calling to count N can to calculate by following formula:
N＝P3/P1＝10/1＝10
Wherein the power output of each POTS port of POTS system is 1W, and promptly this formulate POTS system also allows 10 tunnel pots calls this moment.
(2) when P3＜0, described POTS system cuts off pots call and counts N and can calculate by following formula:
N＝P3/P1＝10/1＝10
Wherein the power output of each POTS port of POTS system is 1W, and promptly this POTS system this moment of formulate system need cut off 10 tunnel pots calls, to satisfy system power dissipation.
A kind of Plain Old Telephone Service pots call treatment facility that the embodiment of the invention provides; pass through current sampling unit respectively by electric current and voltage with the POTS system; the voltage sample unit; amplifying unit; AD converting unit and MCU unit; obtain the dump power or the residue call number of described POTS system; carry out call treatment by processing unit according to dump power or residue call number again; power is excessive when having solved Plain Old Telephone Service POTS system and carrying out dilatation; cause the overload protection of this POTS system; thereby cause normally operation problem of POTS system, improved the stability of POTS system.
The embodiment of the invention also provides a kind of Plain Old Telephone Service POTS system, as shown in Figure 2.
Described pots call treatment facility 202 is used for the current conversion of system is become voltage signal, first voltage signal after the output conversion; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified; Described first voltage signal after will amplifying respectively and described second voltage signal convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; According to the dump power of described POTS system, determine that described POTS system increases or cuts off described pots call.
Described user terminal 204 links to each other with POTS equipment, is used for initiating pots call to the pots call treatment facility when the pots call treatment facility determines that described POTS system can increase pots call.
Wherein said pots call treatment facility can be arranged in the optical network unit in the EPON and described POTS system at least one pots call treatment facility is arranged, each pots call treatment facility can connect at least one user terminal.
The function and the annexation of each unit are consistent with each unit among Fig. 1 in the concrete pots call treatment facility, specifically see also Fig. 1 and describe part accordingly, just repeat no more here.
What the embodiment of the invention provided is a kind of in Plain Old Telephone Service POTS system, by the pots call treatment facility current conversion of system is become voltage signal, first voltage signal after the output conversion; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified, and convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; Dump power according to described POTS system; described POTS system is carried out call treatment; power is excessive when having solved Plain Old Telephone Service POTS system and carrying out dilatation; cause the overload protection of this POTS system; thereby cause normally operation problem of POTS system, improved the stability of POTS system.
As shown in Figure 3, Fig. 3 for the embodiment of the invention provide a kind of in Plain Old Telephone Service POTS system the method flow diagram of call treatment.
Step S302, the current conversion of POTS system is become voltage signal, first voltage signal after the output conversion.
This step can be carried out by current sampling unit (perhaps current sampling circuit), and be specially: current sampling unit can pass through sampling resistor or precision current transducer, and the current conversion of this POTS system is become voltage signal.Wherein, if adopt sampling resistor, the acquisition of multiplying each other of the current value of the resistance value that the first voltage signal V1 after the conversion of this POTS system output can be by sampling resistor and the input current of this POTS system, and the magnitude of voltage V1 after the described sampling, and described magnitude of voltage V1 is imported amplifying unit carry out processing and amplifying.
Step S304, the voltage of system is sampled second voltage signal after the output sampling.
Described voltage sample unit can pass through potential-divider network or accurate voltage transducer, and system voltage is sampled, and exports the second voltage signal V2 of this system behind over-sampling.
If pass through potential-divider network, if the dividing potential drop coefficient of this potential-divider network is A, then input voltage that the value of the second voltage signal V2 can be by this system and the voltage divider system A acquisition of multiplying each other, thus make the value of voltage signal V2 of POTS system output can satisfy the voltage request of device.
Step S306, respectively described first voltage signal and second voltage signal are amplified.
Be specially: amplify by electric current, the voltage signal (being first voltage signal V1 of current sampling unit output and the first voltage signal V2 of voltage sample unit output) of described operational amplifier, make that can simulated digital AD converting unit through the voltage signal after amplifying correctly discerns sampling.
Step S308, described first voltage signal after will amplifying and described second voltage signal convert corresponding digital signal to respectively.
Convert the first voltage signal V1 and voltage signal V2 to corresponding digital signal (being generally binary code), make it possible to correctly be discerned by microprocessor MCU.
In transfer process, can also provide biasing for transfer process, when guaranteeing that analog signal conversion becomes digital signal, accurate reference point be arranged when sampling, make transfer process more accurate by reference power supply.
Step S310, according to the digital signal after the described conversion, and the rated power of described POTS system calculates the dump power that obtains described POTS system.
Specifically comprise:
According to the digital signal after the described conversion, calculate the realtime power of the described POTS of acquisition system;
Rated power according to the realtime power of described POTS system and described POTS system, calculate the dump power of the described POTS of acquisition system, wherein specifically calculate the specific descriptions of the computational process of the dump power POTS system configuration in can reference example 1, just repeat no more here.
Step S312, according to the dump power of described POTS system, described POTS system is carried out call treatment.
Be specially:
According to the power of each POTS port of the dump power of described POTS system and described POTS system, calculate the residue call number that obtains described POTS system;
According to the residue call number of described POTS system, described POTS system is carried out call treatment.
Described POTS system is carried out call treatment specifically to be comprised:
When described dump power greater than zero the time, in described POTS system, increase the pots call of calls value; Perhaps,
When described dump power less than zero the time, cut off the pots call of the calls value of described POTS system.
The embodiment of the invention provides a kind of in Plain Old Telephone Service POTS system the method for call treatment, become voltage signal by current conversion, first voltage signal after the output conversion with system; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified, and convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; Dump power according to described POTS system; described POTS system is carried out call treatment; power is excessive when having solved Plain Old Telephone Service POTS system and carrying out dilatation; cause the overload protection of this POTS system; thereby cause normally operation problem of POTS system, improved the stability of POTS system.One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. Plain Old Telephone Service pots call treatment facility is characterized in that described equipment comprises:
Current sampling unit is used for the current conversion of POTS system is become voltage signal, and exports described voltage signal and give amplifying unit;
The voltage sample unit is used for the voltage of POTS system is sampled, and the voltage signal after the sampling is exported to amplifying unit;
Amplifying unit be used for the voltage signal of amplified current sampling unit output and the voltage signal of voltage sample unit output, and the voltage signal after will amplifying is respectively exported to the AD converting unit.
The analog digital A/D converting unit is used for converting the voltage signal that amplifying unit is exported to digital signal corresponding and exports to micro-control unit MCU;
Micro-control unit MCU is used for the digital signal according to the AD converting unit, and the rated power of described POTS system, calculates the dump power that obtains described POTS system;
Processing unit is used for calculating the dump power that obtains according to described MCU, and described POTS system is carried out call treatment.
2. pots call treatment facility according to claim 1, it is characterized in that, micro-control unit MCU also is used for the dump power according to described POTS system, and the power of each POTS port of described POTS system, calculates the residue call number that obtains described POTS system.
3. pots call treatment facility according to claim 2 is characterized in that, described processing unit also is used for according to the residue call number of described POTS system described system being carried out call treatment.
4. pots call treatment facility according to claim 3 is characterized in that described processing unit specifically is used for, when described dump power greater than zero the time, in described POTS system, increase the pots call of calls value; Perhaps, when described dump power less than zero the time, cut off the pots call of the calls value of described POTS system.
5. a Plain Old Telephone Service POTS system is characterized in that, described POTS system comprises: pots call treatment facility and user terminal;
Described pots call treatment facility is used for the current conversion of system is become voltage signal, first voltage signal after the output conversion; Voltage to system is sampled, second voltage signal after the output sampling; Respectively described first voltage signal and second voltage signal are amplified; Described first voltage signal after will amplifying respectively and described second voltage signal convert corresponding digital signal to; According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system; According to the dump power of described POTS system, determine that described POTS system increases or cuts off described pots call;
Described user terminal links to each other with POTS equipment, is used for initiating pots call to the pots call treatment facility when the pots call treatment facility determines that described POTS system can increase pots call.
6. POTS according to claim 5 system is characterized in that described pots call treatment facility is arranged in the optical network unit.
7. the method for a call treatment in Plain Old Telephone Service POTS system is characterized in that described method comprises:
The current conversion of system is become voltage signal, first voltage signal after the output conversion;
Voltage to system is sampled, second voltage signal after the output sampling;
Respectively described first voltage signal and second voltage signal are amplified;
Described first voltage signal after will amplifying respectively and described second voltage signal convert corresponding digital signal to;
According to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system;
According to the dump power of described POTS system, described POTS system is carried out call treatment.
8. according to the method for the described call treatment of claim 7, it is characterized in that, described according to the digital signal after the described conversion, and the rated power of described POTS system, calculate the dump power that obtains described POTS system and specifically comprise:
According to the digital signal after the described conversion, calculate the realtime power of the described POTS of acquisition system;
According to the rated power of the realtime power of described POTS system and described POTS system, calculate the dump power that obtains described POTS system.
9. according to the method for the described call treatment of claim 7, it is characterized in that described dump power according to described POTS system is carried out call treatment to described POTS system and specifically comprised:
According to the power of each POTS port of the dump power of described POTS system and described POTS system, calculate the residue pots call quantity that obtains described POTS system;
According to the residue pots call quantity of described POTS system, described POTS system is carried out call treatment.
10. according to the method for the described call treatment of claim 9, it is characterized in that described residue call number according to described POTS system carries out call treatment to described POTS system and specifically comprises:
When described dump power greater than zero the time, in described POTS system, increase the pots call of residue pots call quantitative value; Perhaps,
When described dump power less than zero the time, cut off the pots call of the residue pots call quantitative value of described POTS system.
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Application publication date: 20110427 |