Voice Interface Card Installation
This
section introduces the performance, installation
and connecting method of
different voice interface card.
The voice interface card transfers the voice signal into IP packet or frame form on the data network.The voice interface card supplies different kinds of interface to connect telephone equipment or network.The interface cards supplied now are :2-portFXS,2-portFXO,2-portE&M.They can be used on any slots of 1750/2620/2621 router, slot1/slot3 of 2630 router and slot1/slot4 of 2650router.
Picture1
voice interface card
1. Supply
2-port full-flex voice channel.
2. Support the following compressed voice number:
G.723.1 6.3/5.3 kbps,
G.729 AnnexA 8k,
G.727 32k 32k/40k,
G.726 32k 40k,
G.711 alaw 64k,
G.711 ulaw 64k
3.
Meet FRF.11 VoFR IA.voice frame form
4.
Support G.168 回波抵消协议
5.
TIA 464B DTMF test and produce
VAD/CNG(Silence Suppression): G.729 B for G.729A coders,
G.723.1A for G.723.1 coders. High Grade proprietary for G.711,
G.726/727 &NetCoder;
6.
Supply FXS/FXO interfaces and so on.Easy to change.
7 . Support to connect to many telephone equipment and PBX.
Voice module includes three interfaces: FXS,FXO,E&M and can connect to telephone and PSTN as following:
The interface locates between the
user's line and digital exchange network to solve the problems between users
and exchanging network.The terminal is CCITT Z port which can connect the
telephone of the user and supply low-speed data connecting by Modem.
1.
Function:
A.
Battery Feed,Over Voltage Protection,Ringing,Supervision,Codec,2/4
Hybrid, Test of every user.
B . The digital exchange network can only transmit TTL electrical digital signal and can not used for Battery Feed, Ringing, Supervision and Test ,so use the special cable (FXS interface).
C.
The common telephone line is double line and transfer the analog signal,so the
users must use 2/4 line exchange and module/data exchange to connect the user's
line and digital exchange network.
D. The
interruption of thunder and eletricity is possible because the line of
analog user is very complex.. However the equipment used by the router is low
voltage ,so the Over Voltage Protection should be added.
E.
Add the line
management for the line test.
F. The concentration and
deconcentration of traffic service .Above-line connects
multi-terminal of the users and concentrated on the IP network.Below-line
deconcentrates the voice flaw on the IP network to many terminals.
G.
Supply recognizability, counting and Ringing flaw control.
H.
Collect the signal of the users to supply the router choices.
There is one indicator lamp on evry port of the rear panel: In Use——State indicator lamp, indicates the port is using, show as picture :
The local call can be connect to
PSTNor PBX on FXO interface which is supplied by a standard telephone.
1. Performance:
A. The control treatment including bell stream inspection, picking up and hanging up the telephone, dialing-up and etc…
B. The transformation between analog signal and digital voice signal
C. Impedance matching and 2/4 line transfer. Circuit protection
D. Every port of FXO rear panel has two indicator lamp
E, Use---- Mode indicator light, used to indicate the current interface mode.
As the following picture:
FXS/FXO interface uses standard RJ11 connector cable:
RJ11 pin:
Pin |
Signal |
1 |
- |
2 |
- |
3 |
Ring |
4 |
Tip |
5 |
- |
6 |
- |
Note :Do not connect FXS interface to PSTN directly.
Interface features
Entry |
parameter |
Loop impedance: according to the national standard of Z interface of the user A User B
local-used equipment |
200ohm+(560ohm//0.1uF) 200ohm+(680ohm//0.1uF) |
Terminal
impedance balances circuit return loss |
(TBRL) no less than 16dB within
the zone (300~3400Hz) |
The peak value of the bell stream
is no less than |
58V |
Bell value frequency |
25Hz |
Select
the signal type |
DTMF (double audio frequency) |
Command signal type |
China No.1 command signal (Channel
Associated Signaling CAS) |
Dialing tone |
450Hz |
Answering
tone |
450Hz, communicate within 1
second, stop within 4 seconds |
Busy tone |
450Hz, communicate within 1
second, stop within 1 second |
Flapping bell feature |
communicate within 1 second, stop
within 4 seconds |
Use standard RJ45 connector as picture7
Pin |
Signal |
1 |
SB |
2 |
M-lead |
3 |
R(4line:voice input;2line:no use) |
4 |
R or R1(4line:voice output;2line:voice input/output) |
5 |
T or T1(4line:voice output;2line:voice outpput/input) |
6 |
T(4line:voice input;2line:no use) |
7 |
E-lead |
8 |
SG |
table3 RJ45pin
E&M gives conception to every connecting between relay current and signal unit.D-Link analog E&M interface works at signal unit ,so consider another as relay .The two ends can be connected back-to-back by crossing the signal when E&M chooses II or V types and not when the E&M chooses Ior III types.The E&M relay of most PBX can work on relay current and signal unit.The relay configuration of PBX must be changed to work on the relay terminal because the D-Link analog E&M interface works on signal unit.Type I or III is the only method for PBX works with D-Link E&M interface. Some PBX equipments can only work with E&M signal unit of the interface . This means that if you choose I or III type of E&M interface it can not work with D-Link E&M interface but it can connect to D-Link E&M interface if you choose II or V type of E&M.
Every E&M type has only one model
and connecting picture:
Note:
The two units can not be connected back-to-back .
The type I signal unit side and relay circuit side should all be grounded.
D-Link touch-grounged equipment and PBX is very important ,or it is easy to interrupt the E&M signal.
The connecting of typeI& interface of 2 line uses 4 leads.
The connecting of typeI& interface of 4 line uses 6 leads.
(2)、E&M II interface model:
Note:
E&M interfaces can connect back-to-back by crossing the signal line.
The connecting of typeI& interface of 2 line uses 6 leads.
The connecting of typeI& interface of 4 line uses 8 leads.
(3)、E&M III interface model
Note:
The two sides can not connect back-to-back.
The connecting of typeIII& interface of 2 line uses 6 leads.
The connecting of typeIII& interface of 4 line uses 8 leads.
(4)、E&M V interface model:
Note:
Do not isolate ground when it uses typeV.
The two units can not be connected back-to-back .
The connecting of typeV& interface of 2 line uses 4 leads.
The connecting of typeV& interface of 4 line uses 6 leads.
The connecting of E&M interface is complex for the different socket connectors of PBX E&M interface.So the interface cable is not supplied. The connecting of E&M interface refers to" PBX Information".
5. E&M panel lamp
There is one indicator lamp of evry port on the E&M rear panel: In Use--state indicator lamp,used to indicate the port is using.
VIM-2E&M rear panel picture:
VIM-4E&M rear panel picture: