How can I configure in a FXO port which only one specific IP phone can dial out this port?

[admin_2]

In a AVVID network: a CCM, 5 C7960 and one VG200 with a T1 CAS to PBX.

I configured the port 1/0:0 as FXO as extension 6003 and configure the connection plar 6001(IP Phone), so when make a call from PBX to 6003, the call will auto-ring to 6001.

and I also need only allow 6001(IP phone ) to use this FXO port, all others IP phone can't use this FXO,

Please point me how to configure.

[#2]

Not knowing the entire dial-plan, it's hard to pin point.

You can do several things on the call manager, specify calling space. and patition etc.

One simple thing you can try is

on the Vg200, specify a voip dial-peer as following:

dial-peer voice 100 voip

desttination-pattern 6001

incoming called-number 6003

session target ipv4:( call-manager ipadd)