I've a group of 5 FXO on a 2821 controlled via MGCP. Each mgcp is connected to an old cellulink, and when I dial using them, the first digit is randomly dropped. I must send 8 digit through the cellulink, but sometimes arrives only 7.
I've checked with show voice call status, and always 8 digits are sended, but on the cellulink screen I can check that sometimes arrives only 7.
It happens in any of the 5 FXO voice ports randomly.
I've readed that it's a problem with the timing digit or timing inter-digit with old cellulinks, but I've tried different configuration for this without any result.
I've also 2 new cellulink connected with another FXO ports, that works without problem.
CCM is an 5.1(1) version and 2821 has a 12.4(3)g IOS.
If you have a solution for this please let me know.
Do you have you more that one dial-peer configured with the same destination-pattern using your trunk-group of 5 FXO ports?
Ordinarily if your destination-pattern is configured for example as 9.1XXXXXX, then the explicit match is 9.1 and these digits would be stripped and the remaining 7 digits forwarded. Therefore in order to forward all eight digits includng 1 configure forward-digits 8 within your dial-peer.
The FXO are MGCP controlled, so there is no destination pattern configured. The Route pattern is the same for every FXO, because they are assigned in a route group (circular) and linked to the route pattern with a route list.
I've checked on the GW using debugs and show voice call status, and every time I call, the 8 numbers are sended to the FXOs, so there is no strip between the CCM and the MGCP GW.
Thanks for your support, it worked with pre-dial-delay 2 and timing inter-digit 150.
There is only one commentary: because the pre-dial-delay isn't a parameter that can be configured via the CCM interface of the MGCP FXO, everytime I update that interface the configuration on the GW is cleaned from the pre-dial-delay command.
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