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
MP-MLQ/ACELP at 6.3/5.3 kbps,
G.729/Annex A CS-ACELP at 8.0 kbps,
G.727 E-ADPCM at 16 to 40 kbps,
G.726 ADPCM at 16 to
G.711 PCM at 64 kbps. NetCoder at 6.4 to 9.6kbps。
3.
Meet FRF.11 VoFR IA.voice frame form
4.
Support G.168 Echo counteract
protocol
5.
TIA 464B DTMF
test and produce
6.
VAD/CNG(Silence Suppression):
G.729
B for G.729A coders,
and G.723.1A for G.723.1
High
Grade proprietary for G.711, G.726/727 &NetCoder
7.
Supply FXS/FXO
interfaces and so on. Easy to change.
8 . Support to connect to many telephone equipment and PBX.
Note:The
voice interface card does not support hot swap
for avoidingdamage the interface cards, so you should power OFF the router and
disconnect the cable before installing/dismounting the interface card .
The
steps of installing the voice interface card:
1.Power
OFF.
2.Press
the voice interface card into the slot in the rack and tighten the screws of
the voice interface card.
3.Connect the cable to voice interface card and power ON.
4.If it necessary to change the voice interface card .Please react as step1-3.
The
voice interface card of the router includs three kinds:FXS,FXO and E&M.
They can connect telephone ,PBX loop out relay
and interface of PSTN
analog user.As the follows:
picture2
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 evry user.
B . The digital exchange network can only transfer 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
recognition, counting and Ringing flaw control.
H. Collect the signal of the users to supply the router choices.
2.
Line performance:
A. Ring
impendance: Z
interface of the users according to the nation standard.
B.
The
terminal
200ohm+(560ohm/0.1uF)
C.
LAN
computer
200ohm+(680ohm/0.1uF)
D. Terminal impedance balanced return lose (TBRL) is no lower than 16Db within the zone (300~3400Hz).
E. Max
of Ringing flaw is not lower than 100V
F. The
frequency of Ringing flaw
25Hz
G. Type
of the choosing signal
DTMF(double
voice frequency)
H. Type
of signal command
Chinese1 signal command(CAS)
I. Voltage
of battery Feed
>-24V
J. Interface
RJ-11
connector(3
pinàRING, 4
pinàTIP)
K. Dial
voice
450Hz
L. Answer
voice
450Hz,1
second pass,4 second
stop
M. Busy
voice
450Hz,1
second pass,1second
stop
N. Ringing
performance
1second
pass,4second
stop
3.
Lugs:
The
standard RJ11
connector(see figure 3):
figure3: RJ11 cable
Pin |
Signal |
1 |
- |
2 |
- |
3 |
Ring |
4 |
Tip |
5 |
- |
6 |
- |
table1:
RJ11
4.
FXS panel lamp
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 4:
picture4
rear panel of FXS network interface card
The local call can be connect to PSTNor PBX on
FXO interface which is supplied by a standard telephone.
1. Performance:
A.Control
treatment including bell stream detection, pickup and hang up the telephone,
dial-up and etc…
B. The exchange of analog signal and digital voice signal
C. Impendance and
2/4
hybrid
D. Line
protection
2. FXO
lug
FXO lug uses standard RJ11
connector:
picture5 RJ11 cable
|
Signal |
1 |
- |
2 |
- |
3 |
Ring |
4 |
Tip |
5 |
- |
6 |
- |
table2 RJ11 pin
3. FXO panel lamp
show
as pictuer6:
Ring——call indicator lamp, indicates weather there is calling.
Use—— state indicator lamp, indicates the state of the port.
picture6 rear panel of FXO
network interface card
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 output/input)
|
6
|
T(4line:voice input;2line:no use)
|
7
|
E-lead
|
8
|
SG
|
table3 RJ45
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 signal unit and relay of type I must touch ground.
The direct “grounded connection” between D-Link device and PBX is very important, or it will easily generate E&M signal break and continuation.
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 every port on the E&M rear panel: In Use--state indicator lamp,used to indicate the port is using.
picture8 E&M rear panel