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Problems with ISDN calls

admin_2
Level 3
Level 3

Some calls from VoIP network to the PSTN fail. I use CISCO2620 with BRI ports. The calls which fail seems to be segmented. Debug isdn q.931&q.921 shows Cause i = 0x80D1 - Invalid call reference value

What does it mean? Where should I look to solve the problem ?

1 Reply 1

Not applicable

You need to look at the q931 call setup,

to see what the call reference and options

are that are being complained about. So

the info before the cause code is generated

is important.

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