What equipment does the voice core network need?

1, central node (high-speed stable processor): 1 set of voice exchange equipment (with multiple backup capabilities, redundancy and remote backup capabilities. Generally, there are at least two central nodes to ensure the remote disaster tolerance of the whole voice communication network;

2. The device has the function of connecting ordinary telephone, digital telephone, IP telephone, SIP telephone, IP soft telephone and video conference, and supports WIFI wireless telephone, DECT wireless telephone, etc.

3. The equipment must meet the requirements of traditional telephone communication and IP visual communication.

China Telecom and China Netcom.

At present, Huawei and ZTE's equipment are mainly used. The backbone lines are all optical fibers, and the remote end carries out voice transmission through multi-channel optical fiber voice gateways.

Optical transmission equipment 1)SDH optical transmission equipment

2)PDH transmission equipment

3) wavelength division multiplexing (WDM) equipment

4) Optical transmission equipment without optical fiber

5) Optical transmission network equipment

6) Other digital multiplexing and transmission equipment

6. 1) pulse code modulation (PCM) equipment

6.2) Digital circuit multiplier (DCME, etc. )

6.3)PDH multiplexing equipment

6.4) Others

2. Digital program-controlled switching system 1) Fixed program-controlled digital telephone exchange

2) Mobile program-controlled digital telephone switching system (including MSC, VLR, HLR, etc. )

3) Digital program-controlled dispatcher

4) Digital queuing machine

3. No.7 signaling equipment 1) No.7 signaling equipment

4. Intelligent network equipment 1) Fixed intelligent network equipment

1. 1) SSP equipment of service switching point.

1.2) service control point SCP equipment.

1.3) SMP device of service management point

1.4) intelligent peripheral IP

1.5) SCEP equipment service generation environment point

2)GSM intelligent network system equipment

2. 1) SSP equipment of service switching point

2.2) service control point SCP equipment

2.3) SMP equipment of service management point

2.4) Intelligent peripheral IP

3)CDMA intelligent network system equipment

3. 1) SSP equipment of service switching point

3.2) service control point SCP equipment

3.3) Intelligent peripheral IP

4) Printer server

5) Pint Gateway

6) Others

5. Synchronization device 1)GPS/GLONASS receiving device

2)BITS equipment

3)SDH clock transmission equipment

6. Access network equipment 1) Wired access

1. 1) high bit rate digital subscriber loop HDSL equipment.

1.2) ADSL equipment of asymmetric digital subscriber loop.

1.3) Single-pair high-speed digital subscriber loop SHDSL equipment

1.4) Multi-rate symmetric digital subscriber loop MS/HDSL equipment

1.5) ultra-high speed digital subscriber loop VDSL equipment.

1.6) active optical network access equipment

1.7) passive optical network access equipment (PON, A-PON)

1.8)HomePNA device

1.9) Other

2) Wireless access

2. 1)SCDMA wireless access equipment

2.2)450MHz wireless access equipment

2.3)DECT wireless access equipment

2.4) point-to-multipoint microwave access equipment

2.5) Local multipoint distributed wireless access equipment LMDS

2.6)3.5G fixed wireless access equipment

2.7) Others

3) Ethernet access

3. 1) Ethernet access equipment

7. Frame Relay Switch 1) Frame Relay Switch

8.ATM switch 1)ATM switch

9. Integrated service switching system 1) Integrated switching equipment

2) Softswitch equipment

10, routing device 1) core (high-end) router device

2) Edge (low-end) router equipment

1 1, IP gateway and gatekeeper 1)IP telephone gateway.

2)IP phone gatekeeper

3) Media gateway equipment

4)WAP gateway equipment

5) Softswitch equipment

6) Others

12, data communication equipment 1) multiplexer

2) Network access server

3) Digital cross connection

4) DDN node equipment of digital data network

5)GPRS network equipment

6)SMS center

13, call center equipment 1) call center equipment