I?m doing the design for an IP telephony infrastructure for a client. We are planning on running 5 gateways to the PSTN and GSM operator (2 2821 and 3 2851).
To the PSTN we use a VWIC-1MFT-E1 and to the GSM Operators we use 3 VIC2-2BRI-NT/TE per gateway. The VIC interfaces are connected to a phone cell and is this component that converts the G.711 to what ever the GSM protocol used.
In the router patterns the PSTN is design to be the backup to the GSM Operators.
My question is if there is any way to automatically detected (trough an email or something like that) when a interface that servers the GSM operator can?t complete the call, do to problems with the phone cell or with the VIC card.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...