CN110213141A - A kind of integrated access system based on narrow band service - Google Patents
A kind of integrated access system based on narrow band service Download PDFInfo
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- CN110213141A CN110213141A CN201910478620.9A CN201910478620A CN110213141A CN 110213141 A CN110213141 A CN 110213141A CN 201910478620 A CN201910478620 A CN 201910478620A CN 110213141 A CN110213141 A CN 110213141A
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- interface
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- narrow band
- business
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
Abstract
The invention discloses a kind of integrated access system based on narrow band service, which includes: power supply unit, ringing-current unit, control administrative unit, business interface unit, the business unit being connected with business interface unit, machine frame and its back plane circuitry；Wherein, the business unit includes narrow band service.In the integrated access system of the invention based on narrow band service, the narrow band service includes at least one business of analog phone business, ISDN, Digital Data Net, audio special line；The broadband services interface includes at least one business of single pair line high-speed digital subscriber line, local area network.The beneficial effects of the present invention are: the integrated synthesis access system of the mixing application of multiple analog, data service and Ethernet service can be supported, it is practical convenient for user's multi-mode, have ability to next-generation network transition, convenient, fast, economic net construction pattern is provided for operator, improves Network Competitiveness.
Description
Technical field
The present invention relates to technical field of access networks more particularly to a kind of integrated access systems based on narrow band service.
Background technique
As the integrated service of the fusion that the communications industry and computer industry develop, digitlization, high broadband and high intelligence needs
Ask the direction for having become communications industry future development.Access last portion of net as programme-controlled exchange connection user port
Point, it is the key that user is made to realize communication comprehensive business.Therefore access net becomes current telecommunications industry focus of interest.
Access net covering be the switching port that gets off from programme-controlled exchange until client (ONU) all devices.
By so years development, accesses net and formed multiple technologies and deposited, the status of a variety of industry penetrations.Net is accessed as direct
Connect the network of end user, it is necessary to have the business such as voice, data.In public telecom network, since customer quantity is huge, newly
The features such as technology drives the development of new demand, and inevitable requirement accesses the standby low cost of netting gear, multi-service and high bandwidth.With core net
Gradually move towards broadband, access net, which must also synchronize, to be moved towards broadband and be just able to satisfy growing business demand[2]。
In the development process of access net, great variety also occurs for access technology.From the xDSL technology based on copper transmission
To the various access technologies transmitted based on optical fiber, with the development of science and technology these technologies are also constantly in progress.Operator is due to visitor
Family substantial amounts, business demand is extensive, access net again be directly to be connected with client, in recent years in, operator's main development
The big bandwidth access device such as EPON, GPON.For dedicated networks such as such as electric power, petroleum, army, finance, number of users is limited, industry
Business mainly meets itself needs.Integrated access system mainly meets the voice service of substation to power supply company on electric power,
And the information transparencies such as the video monitoring, dynamic environment monitoring and fire fighting monitoring of substation are transferred to power supply company's platform.In portion
In team's network, integrated access system is the same also to use many communication systems, if military radar system is exactly one in army's network
A application case.With the development of radar system, radar communications system not only from transmitting simple data intelligence and language
Sound function will more develop to the direction of high-definition image, big data quantity secret communication.
Therefore, how can solve can support the integrated access system of multi-service mode to can reduce operating cost and promotion
System availability.
Summary of the invention
The embodiment of the present invention provides a kind of integrated access system based on narrow band service, prolongs for realizing to narrow band service
It stretches.
The embodiment of the present invention provides a kind of integrated access system based on narrow band service, which includes: power supply unit, bell
Flow unit, control administrative unit, business interface unit, the business unit being connected with business interface unit, machine frame and its back
Plate circuit；Wherein, the business unit includes narrow band service.
In the integrated access system of the invention based on narrow band service, the narrow band service includes analog phone business
(POTS, PlainOldTelephoneService), ISDN (ISDN, Integrated Services
Digital Network), at least one business of Digital Data Net (DDN, Digital Data Network), audio special line；
The broadband services interface includes single pair line high-speed digital subscriber line (SHDSL, Single-pair High bit rate
Digital Subscriber Line), at least one business of local area network (LAN, Local Area Network).
In the integrated access system of the invention based on narrow band service, the business interface unit includes that narrow band service connects
Mouth and broadband services interface；
Wherein, the narrow band service interface include POTS interface, ISDN BRI (Basic Rate Interface) interface,
ISDN PRI (Primary Rate Interface) interface, DDN, audio leased-line interface at least one interface；
The broadband services interface includes at least one of SHDSL interface, LAN interface.
In the integrated access system of the invention based on narrow band service, the power supply unit include AC power source include and
The one of which of DC power supply or two kinds；Wherein, the power supply unit is additionally provided at least one power supply indicator.
In the integrated access system of the invention based on narrow band service, the control administrative unit includes central processing
Device, time-slot cross unit and lane testing unit；Wherein, the lane testing unit is used to survey audio interface and E/M signaling
Examination.
In the integrated access system of the invention based on narrow band service, the control administrative unit by communication interface with
Network management platform is connected；Wherein, the network management platform can select the channel that can be tested, and pass through control administrative unit control
The test of the lane testing unit channel.
In the integrated access system of the invention based on narrow band service, the communication interface includes RS232 communication interface
With at least one of IP (Internet Protocol, Internet protocol) communication interface.
In the integrated access system of the invention based on narrow band service, the business unit includes analog phone business mould
Block, data service module, at least one of ISDN business module.
In the integrated access system of the invention based on narrow band service, the ringing-current unit is FXS (Foreign
Exchange Station, external exchange station) block and test cell offer ringing-current.
In the integrated access system of the invention based on narrow band service, which further includes IP unit, for storing this
The Various types of data of system each unit.
The beneficial effects of the present invention are: can support the mixing application of multiple analog, data service and Ethernet service
Integrated synthesis access system, it is practical convenient for user's multi-mode, have ability to next-generation network transition, it is provided for operator
Convenient, fast, economic net construction pattern improves Network Competitiveness.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of system framework figure of the integrated access system of narrow band service provided in an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It is described in detail separately below.
Description and claims of this specification and term " first ", " second ", " third " and " in the attached drawing
Four " etc. are not use to describe a particular order for distinguishing different objects.In addition, term " includes " and " having " and it
Any deformation, it is intended that cover and non-exclusive include.Such as it contains the process, method of a series of steps or units, be
System, product or equipment are not limited to listed step or unit, but optionally further comprising the step of not listing or list
Member, or optionally further comprising other step or units intrinsic for these process, methods, product or equipment.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
It please refers to as shown in Figure 1, being that the embodiment of the invention provides a kind of integrated access systems based on narrow band service
System construction drawing, the system include: power supply unit, ringing-current unit, control administrative unit, business interface unit and business interface
Business unit, machine frame and its back plane circuitry that unit is connected；Wherein, the business unit includes narrow band service.
Wherein, the control administrative unit is connected with power supply unit, ringing-current unit, business unit and back plane circuitry respectively
It connects, wherein the control administrative unit, power supply unit, ringing-current unit, business unit and back plane circuitry are arranged among machine frame.
The system further includes optical cross connect (opticalcross-connect, OXC) light trunk module, the OXC light
Trunk module has two-way module and two kind 2 of single channel module, is intelligent acess transmission mode, can hold hot plugging online, props up
Hold star-like, chain (tree-shaped) and ring-like equal networking modes.Meet PDH, SDH speed grade specification, meets ITU-T (international telecommunication
Alliance's telecommunication standards tissue, ITU-T for ITUT elecommunication Standardization
Sector), Association of Engineers (IEEE, Institute of Electrical and Electronics Engineers),
IEC (Electrical and Electronic International Electrotechnical Commission) technical standard, has the function of OXC (DXC) automatic protection switching.
Two-way module has 2 independent access transmission channels；
Single channel module is 1 transmission channel, can be deployed in proximal end or distal end on demand.OXC light trunk module can be independent
2 different transmission direction optical fiber are accessed, are used by single channel, it can also be with adjacent OXC light trunk module physical location optical port
The corresponding standby usage that constitutes protects channel, realizes and accesses transmission cross protection, switching time≤20ms (maximum switching time≤
30ms)。
Meanwhile module extension bearing data service capacity is the Ethernet of 8 E1 and 100M net rates.
In the integrated access system of the invention based on narrow band service, the narrow band service includes POTS (analog phone
Business), at least one business of ISDN (ISDN), DDN (Digital Data Net), audio special line；The broadband industry
Business interface includes at least one business of SHDSL (single pair line high-speed digital subscriber line), LAN (local area network).
POTS (PlainOldTelephoneService): analog phone business is the analog telephony of standard, and
And almost in the world from anywhere in, it is still the citation form of resident and small business's telephone service.Originally, general
Logical outdated telephone service is referred to as post office telephone service in many countries.Hereafter, although having been incited somebody to action from the mid-term of twentieth century
Since electronic telephone exchange introduces public exchange network, but it is applied to telephone system from the 19th-century later period, use common
Family is substantially not change.
Analog phone business (POTS) quotes the standard telephony service that most of families use.POTS about undergoes 100 years
The time of left and right, by initial analog phone epoch, the public switched telephone network of electronic telephone era development finally
(PSTN) epoch.On the contrary, the telephone service based on high speed, digital line, such as ISDN, DSL and FDDI are not belonging to
The scope of POTS.The main distinction between POTS and non-POTS business is speed and bandwidth.Under normal circumstances by the speed of POTS
It is limited to 52Kbps (52000bits/s).But some emerging digital circuit communications, such as Asymmetrical Digital Subscriber Line
(ADSL) and the connection such as ISDN (ISDN) local channel, is provided for analog phone business (POTS), and is number
Data transmission provides most of bandwidth.
ISDN ISDN (Integrated Services Digital Network, ISDN) is a number
Word telephone network international standard is a kind of typical circuit-switched network system.It is by common copper cable with higher rate
With mass transport voice-and-data.ISDN is the universal telephone network form in Europe.Gsm mobile telephone standard can also be based on
ISDN transmission data.
ISDN has 6 kinds of channels:
A channel 4khz analog channel
B channel 64kbps is for voice data, adjustment data, digital fax
The digital channel of C channel 8kbps/16kbps, is used for transmission low speed data
D channel 16kbps digital channel, is used for transmission user's access signaling
E channel 64kbps digital channel, is used for transmission interior signaling
H-channel 384kbps high speed data transfer digital channel, for such as image, video conference, quick faxes
B represents carrying, and D represents Delta.
ISDN has 3 kinds of standardization access rates:
Basic rate interface (BRI) is by 2 B channels, the D channel group of each bandwidth 64kbps and a bandwidth 16kbps
At.Three channel designs are at 2B+D.
Primary rate interface (PRI)-is made of the D channel of many B channels and a bandwidth 64Kbps, the quantity of B channel
Depending on different countries:
North America and Japan: 23B+1D, total bit rate 1.544Mbit/s (T1)
Europe, Australia: 30B+2D, total bit rate 2.048Mbit/s (E1)
Mixing rate: 1A+1C
Audio call is transmitted by data channel (B), and control signal path (D) is used to be arranged and manage connection.Call setup
When vertical, the synchronizing channel of a 64K is established and occupies, until end of calling.Each channel B could set up one
Independent voice connection.Multiple channel Bs can be merged into the single data channel an of high bandwidth by being multiplexed.
D channel can be used for sending and receiving X.25 data packet, access X.25 packet network.
SHDSL is the English abbreviation of Single-pair High bit rate Digital Subscriber Line, in
Text address single pair line high-speed digital subscriber line, it then follows the consensus standards such as ITU-TG.991.2, G994.2.Agreement exists always in recent years
It supplements.To be developed in HDSL technology, since SHDSL only needs a pair of telephone lines, can greatly reduce operator and
The consumption of the copper wire resource of user.SHDSL uses TC-PAM16/32/64/ coding mode, and coding is higher, and transmission speed is faster.
It can be used in a variety of communications types such as voice, data and video.
Analog phone business, a kind of telecommunications tool of similar shaped like narrow, for transmitting audio call；
DDN (Digital Data Network, Digital Data Net, i.e. usually described Internet access via leased-line mode), is to utilize
The data transmission network of digital channel transmission data-signal.It is to lead to tens of thousands of, the hundreds of thousands of digital circuits based on optical cable
Cross digital circuit management equipment, constitute transmission rate height, high-quality, network delay is small, all-transparent, high flow capacity data pass
Defeated basic network.
Core layer, access layer, user interface layer can be divided into again according to the basic function DDN net of network.
Core layer: with 2M circuit, backbone node core is constituted, the signaling transfer point of network service, including frame relay industry are executed
The signaling transfer point of business.
Access layer: sub-rate multiplexing and interconnection, frame relay service user access and local are provided for all kinds of business of DDN
Frame relay feature and compressed voice/G3 fax user-network access.
User interface layer: adaptation and signaling transfer point are provided for user-network access.Such as low capacity time division multiplex equipment.
SHDSL is the English abbreviation of Single-pair High bit rate Digital Subscriber Line, in
Text address single pair line high-speed digital subscriber line
By the network hardware, (including network server, network workstation, the network printer, network interface card, the network interconnection are set local area network
It is standby etc.) and Network Transfer Media and network software formed.
In the integrated access system of the invention based on narrow band service, the business interface unit includes that narrow band service connects
Mouth and broadband services interface；
Wherein, the narrow band service interface includes POTS interface, ISDN bri interface, ISDN PRI interface, DDN, audio
At least one interface of leased-line interface；
The broadband services interface includes at least one of SHDSL interface, LAN interface.
Wherein, ISDN bri port is realized by router for isdn line and Internet or other telecommunication networks
Connection, for current most of twisted pair copper wire telephone wires.Three channel total bandwidths of ISDN BRI are 144kbps.Wherein
Two channels are known as the channel B (load, Bearer), rate 64kbps, for carrying sound, image and data communication.Third
A channel is D (data) channel, is 16kbps signal path, for telling how public switched telephone network handles each channel B.
There are two types of rate connectivity ports by ISDN, and one is ISDN BRI (basic rate interface), another kind is ISDN PRI (primary rate
Interface), it is based on T1 (23B+D) or E1 (30B+D), total rate is respectively 1.544Mbps or 2.048Mbps.The end ISDN BRI
Mouth is that the connection using RJ-45 standard, with ISDN NT1 uses RJ-45-to-RJ-45 direct-through line.
There are two types of interface structures, i.e. ISDN bri interface, ISDN PRI interface for isdn user and network interface.
ISDNBRI (Integrated Services Digital Network Basic Rate Interface) connects
Mouthful: basic rate interface provides the channel of 2 64kbit/s rates and the channel of 1 16kbit/s rate, that is to say 2 B letters
Road and 1 D channel, the in total truck of 144kbit/s.B channel is for transmitting the logical of the user informations such as voice-and-data
Road.D channel is the channel for transmitting signaling information and low-speed packet data.BRI is interface used in most of user, user
For up to 8 various types terminals can be accessed on this interface, carry out the logical of the multiple business such as voice, data and image
Letter.
ISDN PRI(Integrated Services Digital Network The Primary Rate
Interface it) is also referred to as Primary Rate Interface, is a kind of usual call of circuit types.PRI (30B+D) rate is
2.048Mb/s, can be with analogy E1 route.It is generally used for: the first, the voice service of operator's offer, line size
2.048Mb/s, access ISDN can directly use telephone set and PERCOM peripheral communication after netting；The second, from router to PBX equipment voice
Route can meet Fax and telephone set below the equipment of PBX.Telephone set can be obtained by router and Intranet IP Phone
Connection.
The rate of B channel is as the B channel speed of BRI in PRI interface, but the rate of its D channel is 64kbit/s, this
Sample D channel can provide control service for more B channels.PRI is according to various countries or the different difference of regional digital transmission system
There are two kinds of structures of 23B+D and 30B+D.If the U.S., Japan and tw Taiwan use the primary rate of 1544kbit/s,
PRI uses 23B+D interface structure.European countries and the mainland are all made of the primary rate of 2048kbit/s, and PRI is used
30B+D structure.It is general since PRI can provide highly reliable, large capacity communication bandwidth for user, and due to current intelligent acess
And PRI access is very convenient, so group user largely uses PRI to be accessed.
In the integrated access system of the invention based on narrow band service, the power supply unit include AC power source include and
The one of which of DC power supply or two kinds；Wherein, the power supply unit is additionally provided at least one power supply indicator.
In the integrated access system of the invention based on narrow band service, the control administrative unit includes central processing
Device, time-slot cross unit and lane testing unit；Wherein, the lane testing unit is used to survey audio interface and E/M signaling
Examination.
Single frame 64Kbps access capacity is 192,64 E1.Subcard, maximum expansible 8 PT506 are cascaded by rack
Machine frame, single capacity is up to 1024 lines.
Be connected by the E1 interface of optical communication interface or standard with other transmission devices, realize remote opening voice,
The function of the business such as narrow band data；
The drop/insert function of the achievable all kinds of business of E1 cross-connect matrix；Trunk module can also be configured, is realized
The function of programme-controlled exchange；
Configuration measurement control module and calculation matrix realize that remote equipment and outside line proximal end are managed concentratedly.
Network management supports centralized and distributed network structure, and the PT serial equipment with computer room is cascaded by RS232；Different machines
The equipment in room is connected by the TS0 of 2M.Network management platform is connect by RS232 mouthfuls or by Ethernet with ANM management terminal, capacity
>=(1024 × 1024) network element.
Further, the control administrative unit is connected by communication interface with network management platform；Wherein, the network management is flat
Platform can select the channel that can be tested, and the test of the lane testing unit channel is controlled by controlling administrative unit.
Equipment have local maintenance and management port, while can flexible access network management system, realize network structure figure pipe
Reason, NE management, Topology Management, performance management, configuration management, fault management, log management, measuring management (device measuring and
Loop test), the centralized network management function such as safety management；
Whole network equipment operation conditions is monitored in real time, the behaviour such as fault location, time slot reallocation, on-line testing is carried out to equipment
Make.
Further, the communication interface includes at least one of RS232 communication interface and IP communication interface.
In the integrated access system of the invention based on narrow band service, the business unit includes analog phone business mould
Block, data service module, at least one of ISDN business module.
Wherein, analog phone user interface, also referred to as Z interface.Its extension business is referred to as FXO-FXS business (FXO: periphery
Exchange side interface；FXS: Foreign Exchange Subscriber), V5 interface, which can not be provided, suitable for LE/PBX is connected with access net,
It needs to access net offer FXO interface to be connected with LE/PBX, FXS interface is provided by ordinary user's plate, to complete LE/PBX extraction
Analog interface access net in transparent transmission.This Service Interface Card is divided into local side analog phone Service Interface Card and distal end
Analog phone Service Interface Card.
Wherein, the analog phone business module includes local side analog phone business and far-end analog telephone business.
Further, local side analog phone business, also referred to as FXO.Major function is the user's line for connecting interchanger, accesses language
Sound channel completes the coding of audio signal, decoding, the conversion of two/tetra- lines, ringing signal detection, signaling decoding, establishes proximal end simulation
Speech channel accesses cable physical measurement routing etc..Each FXO module has 4 channels, the extension as convertor user line.With distal end
Analog way module is used cooperatively in pairs.It needs to configure measurement line capture module module when far-end measuring function, receives measurement
Control module instruction and control, can complete the electrical speech level and signaling of testing each channel, determine FXS interface and substation
Whether connect and carry out access cable measured either qualitatively or quantitatively.
Further, far-end analog telephone business, also referred to as FXS.Major function be complete the coding of audio signal, decoding,
The conversion of two/tetra- lines feeds to user, sends ringing-current, provides outdoor twisted pair overvoltage protection etc..Each FXS module has 4 to lead to
Road.FXS and FXO are used cooperatively, and local interface FXO, remote interface is then necessary for FXS.Measure the control of line capture module conjunction measuring
Molding block establishes outside line measurement physics routing, and detects to outdoor route.Can test each channel electrical speech level and
Signaling and progress subscribers' line are measured either qualitatively or quantitatively.
The data service module, can be with remote testing data channel by the cooperation of measurement control module and line capture module
Working condition.
Wherein, the ISDN business module provides number connection end to end for digitizing local loop for user.
Basic rate interface provides 2B+D access, i.e., the B access of 2 64kbit/s and the D access of a 16kbit/s；Primary rate connects
Mouth provides the access of 30B+D, substantially increases data communication rates, and the bit error rate is low, and efficiency of transmission is high.
In the integrated access system of the invention based on narrow band service, the ringing-current unit is FXS, card and test cell
Ringing-current is provided.
In the integrated access system of the invention based on narrow band service, which further includes IP unit, for storing this
The Various types of data of system each unit.
The beneficial effects of the present invention are: can support the mixing application of multiple analog, data service and Ethernet service
Integrated synthesis access system, it is practical convenient for user's multi-mode, have ability to next-generation network transition, it is provided for operator
Convenient, fast, economic net construction pattern improves Network Competitiveness.
The embodiment of the present invention has been described in detail above, specific case used herein to the principle of the present invention and
Embodiment is expounded, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；
At the same time, for those skilled in the art can in specific embodiments and applications according to the thought of the present invention
There is change place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of integrated access system based on narrow band service, which is characterized in that the system include: power supply unit, ringing-current unit,
Control administrative unit, business interface unit, the business unit being connected with business interface unit, machine frame and its back plane circuitry；
Wherein, the business unit includes narrow band service.
2. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the narrow band service packet
Include at least one business of POTS, ISDN, DDN, audio special line；The broadband services interface includes at least the one of SHDSL, LAN
Kind business.
3. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the business interface list
Member includes narrow band service interface and broadband services interface；
Wherein, the narrow band service interface includes POTS interface, ISDN bri interface, ISDN PRI interface, DDN, audio special line
At least one interface of interface；
The broadband services interface includes at least one of SHDSL interface, LAN interface.
4. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the power supply unit packet
Including AC power source includes and the one of which of DC power supply or two kinds；Wherein, the power supply unit is additionally provided at least one electricity
Source indicator light.
5. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the control management is single
Member includes central processing unit, time-slot cross unit and lane testing unit；Wherein, the lane testing unit is for connecing audio
Mouth and E/M signaling test.
6. the integrated access system according to claim 5 based on narrow band service, which is characterized in that the control management is single
Member is connected by communication interface with network management platform；Wherein, the network management platform can select the channel that can be tested, and pass through
Control administrative unit controls the test of the lane testing unit channel.
7. the integrated access system according to claim 6 based on narrow band service, which is characterized in that the communication interface packet
Include at least one of RS232 communication interface and IP communication interface.
8. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the business unit packet
Include at least one of analog phone business module, data service module, ISDN business module.
9. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the ringing-current unit is
FXS card and test cell provide ringing-current.
10. the integrated access system according to claim 1 based on narrow band service, which is characterized in that the system further includes
IP unit, for storing the Various types of data of the system each unit.
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| CN1909558A (en) * | 2006-08-23 | 2007-02-07 | 华为技术有限公司 | Integrated access system, method and narrow-band service interface module |
| CN104468218A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | PCM device based on transmission equipment |
| CN108574528A (en) * | 2017-12-26 | 2018-09-25 | 国网湖北省电力有限公司荆门供电公司 | The special 2M optical interfaces multiplexing channel of protection signal of electric power and application process |
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2019
- 2019-06-03 CN CN201910478620.9A patent/CN110213141A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909558A (en) * | 2006-08-23 | 2007-02-07 | 华为技术有限公司 | Integrated access system, method and narrow-band service interface module |
| CN104468218A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | PCM device based on transmission equipment |
| CN108574528A (en) * | 2017-12-26 | 2018-09-25 | 国网湖北省电力有限公司荆门供电公司 | The special 2M optical interfaces multiplexing channel of protection signal of electric power and application process |
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