GP4020

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Notes for implementing Radio over IP using Cisco routers.

Diagrams

This is the wiring diagram between a Cisco 2821 4 Wire E&M card and the Alinco DR-135 Data connector.

RJ-45 (M)       Function   Alinco DR-135 - DB9 Data Connector
1        SB     
2        M      
3        R      Spkr +     4    Out 1200 Baud
4        R1     Mic  -     5    GND
5        T1     Mic  +     9    In  1200 Baud
6        T      Spkr -     5    GND
7        E      PTT        7    PTT
8        GND    GND        5    GND

The configuration for monitoring an audio source. Dialing 7668 connects the softphone to port 1/0/1.

voice-port 1/0/1
 auto-cut-through
 operation 4-wire
 type 2
 signal lmr
 bootup e-lead off
 lmr e-lead inactive
 lmr led-on
 input gain -3
 output attenuation 10
 no echo-cancel enable
 no comfort-noise
 timeouts call-disconnect 3
 timing delay-voice tdm 470
 timing ignore m-lead 500
 threshold noise -60

dial-peer voice 41 pots
 destination-pattern 7668
 port 1/0/1

References