Specifications
139
Model 26 Backup in a VoIP System
Figure 48: Model 6203/6204 Connections for a VoIP System using Radio Backup
Jumper Changes inside the Model 6203
Depending on how the Model 6203 was originally configured, you may not need to
change anything. Still you will need to check the positions of the jumpers mentioned here
in order to ensure proper operation of the station alerting unit in both normal and backup
modes. For help in locating jumpers on the station alerting unit motherboard, refer to
Figure 49 on page 148.
♦ Checking the Model 6203 jumper settings:
1. Check that the Dual RX Audio Source Summing jumper is installed on JP14
(instead of a normal 2-pin jumper). This jumper will be three pins wide and have a
small PCB attached to its top.
2. Check that the COR Pull-up (JP9) jumper is in the “A” position.
3. Check that the VOX Control (JP3) jumper is in the “B” position.
IP
Interface
Board
Backup Radio
Carrying
Voice Audio
&
FFSK Data
Model 6203
IP Station
Unit
Model 6204
IP Station
Unit
AUX RX-A
AUX RX-B
RX COR
TX Audio +
TX Audio -
PA Audio Comm A
PA Audio Comm B
GND
11
9
8
7
4
3
2
J4
GND
1
11
9
J3
Common
PA System
Input 2Input 1
RX Audio
PTT In
P4
3
GND
8
7
4
3
2
1
J5
Handset PTT
HKSW
Off Hook
2
6
IP
Network
GND
PTT Out
1
PTT
RX COR
4
TX Audio
5
RX Audio
RX AUD +
RX AUD -
PA Busy
11
9
8
7
4
3
2
J4
XMIT PTT
RX COR
GND
4
3
2
1
J5
RX AUD +
RX AUD -
GND
AUX RX-B
AUX RX-A
XMIT PTT
GND
TX Audio -
TX Audio +
PA Busy
PA Audio Comm A
PA Audio Comm B
1
11
9
J3
TX Audio
NC
GND