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CCM MGCP configuration for an analog phone

Hi all,

I am in trouble with between CCM and FXS port. When I pick an analog phone up on FXS port, It always sounds busy-tone, so I can not dial everytimes. Strangely it is possible to call from ip phone to analog phone, but not from the analog phone to IP phone. Of course, I made sure that both of FXS port and phone were registered to CCM properly.

In this case, Do I need specific configuration for FXS on IOS gateway, based on 2600xx, or on CCM ?

can anybody else know about those kinds of situation or experienced people ?

My simple config is the following

-------- the following on 26xxXM IOS ---------

MGCP

mgcp

mgcp dtmf-relay voip codec all mode out-of-band

mgcp call-agent 192.168.10.10

mgcp sdp simple

...

ccm-manager mgcp

...

...

dial-peer voice 101 pots

application MGCPAPP

port 1/0/0

-------- the end --------------

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