Tuesday, January 25, 2011

VG224 FXS port as SCCP registered to call manager

The default behavior for an FXS port (a port that you connect an analog phone or fax to)  on a cisco router is to act as a gateway port that is configured with h.323 in CallManager Express.
We can make the FXS port act just like a SCCP controlled phone like a VG224 port or phone connected to an analog telephony adapter.  This way you can control the phone in CallManager express and use CME to manage hunting and other features.

Cisco has a configuration guide for STCAPP at This Link

Below is a sample working configuration:
sccp local FastEthernet0/0.15
sccp ccm identifier 10
sccp ccm identifier 12

sccp ccm group 1
associate ccm 10 priority 1
associate ccm 12 priority 2
associate ccm 30 priority 3
switchback method graceful
stcapp ccm-group 1

dial-peer voice 3 pots
service stcapp
port 0/1/0

voice-port 0/1/0
caller-id enable

The FXS port also needs to The FXS port also needs to be registered as an analog phone:
ephone 13
device-security-mode none
mac-address DA2F.E2B0.0001
type anl
button 1:2
You can find the MAC address of the port by issuing the command from the CLI:

show stcapp device summary

Which will give you this display:

Total Devices: 3
Total Calls in Progress: 0
Total Call Legs in Use: 0

Port Device Device Call Dev Directory Dev
Identifier Name State State Type Number Cntl
---------- --------------- -------- ------------- ------- ----------- ----
0/0/0 AN1DA2FE2B00000 IS IDLE ALG 111 CME
0/0/1 AN1DA2FE2B00001 IS IDLE ALG 112 CME
0/0/2 AN1DA2FE2B00002 IS IDLE ALG 222 CME


  1. Hi guy. I was searching for a document like yours. It is interesting but little bit confused.
    Could you more specify where lines for CME and other for VGs?

  2. Found this doc on cisco website

    VG224 Voice Gateway SCCP Registration with CME Configuration Example


    this might help.