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H323 Fast Start Issue

Hi all,

Call start Fast was dropping calls with Temporary Failure (41) after put on hold and in show call history voice id, RemoteUDPPort=0.

If I change to call start slow, calls are OK, but I need use fast start.

Scenario is:

PSTN -> GW (E1 CAS) -> Device SCCP (CUCM 7.x)

GW config

voice class h323 1

  h225 timeout tcp establish 3

  call start fast

  call preserve

voice class codec 1

codec preference 1 g711ulaw

codec preference 2 g711alaw

codec preference 3 g729r8

dial-peer voice 110 voip

destination pattern 74.........$

rtp payload-type comfort-noise 13

voice class h323 1

voice class codec 1

session target ipv4:10.0.0.10

dtmf-relay h245-alphanumeric

fax-relay ecm disable

ip qos dscp cs3 signaling

no vad

The Enable Inbound FastStart was checked in CUCM GW config.

Any idea???

Thanks

Lonardoni

1 Reply 1

Do you have already seen these notes?

https://supportforums.cisco.com/thread/2112035

What's happen if you try to disable h245 tunnel?

Regrds.