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2010 Jun 24
2
T.38 on a MAX/Lucent/Ascend TNT
...h a data call without any problems (although at a maximum of 31200bps/3429 baud using a 33.6 modem, for reasons I haven't dug into yet.) Whenever I try to send a fax from the laptop, however, the call always seems to fail in the first HDLC phase (phase B) with either a timeout or error 23 (COMREC invalid command received.) The modem is connected directly to the channel bank and the channel bank is connected directly to the TNT in an attempt to reduce the number of variables. With my current configuration, the call to Asterisk will come up as a voice call, then be dumped into t38modem w...