[Asterisk-Users] Strange problem with TDM400 FXO in UK

[Ian D. Wlloughby]

Hi Folks,
I have a Rev H TDM01B board which seems to be working pretty well. However sometimes when I dial out on the Zap channel I get the Congestion signal on my SIP phone and a message logged in the log file saying :-
Unable to create channel of type 'Zap'

followed by :-

Dial argument takes format (technology1/[device:]numbe&technology2/[device:]number2...|optional timeout)

If I then dial in my SIP phone rings and I am again able to dial out.

I am guessing the Polarity reversal on the dial in is reseting the channel but why is it getting in this state in the first place, any idea's?

Regards
Ian
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