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  • Configure PDK US_FXS_LS_IO for Cisco FXS Voice Port
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When configuring a Dialogic JCT series media board with a T-1 interface to connect to a Cisco Voice Gateway via an FXS board, there are settings needed in the Cisco configuration to make sure the port operates properly.


First, configure the FXS voice port for loopstart:

R1#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

R1(config)#voice-port 1/1
R1(config-voiceport)#signal loopstart
R1(config-voiceport)#ring cadence define 50 10
R1(config-voiceport)#no shutdown
R1(config-voiceport)#impedance 600c

If issues occur with hookflash, try these configuration adjustments

- Increase the interdigit timing duration using the following configuration command:

R1(config-voiceport)#timing interdigit 150

- Insert a # in the post-hookflash number dial to ensure the call completes.

Product List

Dialogic JCT series T1 Media Boards

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