Configure Physical Voice Port

Configure Analog Voice Port

To configure CME voice port on router, first find out what voice ports is equipped on the router by running the following command:
Router# show voice port summary
FXS: Foreign eXchange Station
FXO: Foreign eXchange Office

For analog FXS port configuration, there are several configuration options:
- signaling:
   Ground start: must be configured and typically used when connecting to PBX equipment.
   Loop start: is mon by default and typically is used when connecting to telephone, modem or fax.
- Call progress tones: audio signaling that inform the caller how the call is progressing.
- Caller ID information.

Note: each ephone-dn configured using CME will show up as EXFS port.
Configuration example for fax line connected to FXS port
# show voice port summary
Find available FXS port for the fax line.
# config t
voice-port 0/0/0
signal loop start
cptone sg
station-id name 3rd floor fax
station-id number 555-1001