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Unanswered Question

Using debug isdn q931 I saw the message: Mandatory information element missing.

Could this be an erros between SRST and PBX ? (PBX is connected to PSTN)

Jun 12 13:57:42.440: ISDN Se1/0:15 Q931: RX <- STATUS pd = 8 callref = 0x5B31

Cause i = 0x81E01C - Mandatory information element missing

Call State i = 0x0A

Thanks.

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