- What type of MD connection for the incoming calls, is it DID or ISND, from PSTN or PBX ? (ROCAP & RODAP)
- What is SERV for the group hunt ? (GHDAP)
- Is it the same if the call comes directly to the operator, i.e. not through hunt group ?
Maybe the other PBX is not sending A-number in alerting.
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