I work with Cisco AS5350XM GW , version 12.3 (12r)PI6b.
I tried to make a call scenario with protocol H.323 only from TS trough Cisco gateway back to same TS. The call scenario with h.323 fast start was successful, but when I switched to slow start, Cisco gateway did not respond on h245 massage and release the call.
dial-peer 12 voip
voice-class h323 1
session target ipv4:x.x.x.x
dtmf-relay rtp-nte h245-alphanumeric
voice class h323 1
call start slow
thank in advance