"Upgrading the Cisco IOS gateway to a software release later than Cisco IOS 12.2( 8 )T causes calls to and from NetMeeting, or another third party H323 device, to fail."
"The h245 caps mode restricted command is present in Cisco IOS Software Release 12.2(11)T, and prevents
Dual Tone Multifrequency (DTMF) Named Telephone Events (NTEs) as well as T38 capability indication in
the H245 Terminal Capability Set packet. When these options are present, it can prevent the H245 negotiation
from completing with some devices, specifically with NetMeeting. Without the h245 caps mode restricted
command, calls in either direction will fail."
Способ решения предлагается следующий
esc−3640−3(conf−serv−h323)#h245 caps mode restricted
esc−3640−3(conf−serv−h323)#h245 tunnel disable
После первой команды пропадает глобальная поддержка Т.38, но ее можно включить на конкретном диал-пире, после этого факсы по Т.38 ходят в обе стороны.
Проверено на 5350 IOS 12.3.1 Enterprize Plus и DG-104SH Boot PROM Version 1.0B13-G Firmware Version 1.0B42-G.
_________________ С уважением, Дмитрий Письменов
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