Problems Asterisk - E1 - TOPEX GSM Gateway


I have 2 asterisk boxes connected both through internet with 8Mbit via IAX trunking. In asterisk A I have one TE410P card with one E1 active and I receive calls from PSTN and send them to asterisk B.

In asterisk B I have other TE410P and one port is connected to one TOPEX GSM Gateway for outgoing calls to GSM network.

Anyone using TOPEX with Asterisk connected with E1 interface? I have problems about quality of calls and ASR indicator is really low. I tested to use other IP gateways and it was fine.

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