I have recently done an CM intergration with an alcatel PBX with E1 Qsig.The alcatel phones can call the Cisco Ip phones extensions and vise versa. The issue is the alcatel phones cannot use the telco PSTN PRI on the MGCP gateway for outgoing PSTN calls. Incoming calls to the alcatel phones work fine. I see in the debug isdn that only two digits are been passed e.g "99" to the gateway from the alcatel system.
I need to know is whether the CM is blocking the complete E.64 number or the addition digits is not being passed from the alcatel system itself ?
I have no partitions and CSS configured. The Cisco IP Phones can call out to PSTN using the ISDN PRI.
Following is the debug ISDN Q931 output from a PSTN call made from a alcatel phone 4238 to a GSM number 99431901.
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