It usually means there was a timeout reading TPKT header. TPKT is a wrapper
around a H.245 message. It consists of 4 bytes: a constant value 3, a padding 
byte (usually 0),
and 2 bytes showing packet length. Maybe your equipment does not set the first 
byte to 3?
A tcpdump/wireshark could reveal more details.

  ----- Original Message ----- 
  From: Paul Hii 
  To: [email protected] 
  Cc: Megat Ahmad Nazri 
  Sent: Thursday, September 04, 2008 10:07 AM
  Subject: Re: [Openh323gk-users] Openh323gk-users Digest, Vol 22, Issue 16



  Hi, 

  we have been having an issue with a Tandberg Edge 95 MXP that is failing to 
establish calls via our gnugk 2.2.7. 

  Tandberg Edge 95 MXP (Malaysia) --- gnugk227 (Australia) --- Tandberg 150 
(Australia) 

  The gnugk227 is in routed mode and proxies all calls. Both the Edge 95 and 
T150 are registered to the gnugk227. 

  The T150 initiated the call via the gnugk227 to Edge 95. The usual arq, acf, 
q931 (setup, alert, connect) happens until the call connection failed in the 
exchange of h245 terminalCapabilitySet. 

  Please see the gnugk log below: 

  2008/08/28 14:27:31.333        3        ProxyChannel.cxx(3719)        H245    
    Connected from T150:5559 on gnugk227:11473 
  2008/08/28 14:27:31.436        3        ProxyChannel.cxx(3751)        H245    
    Connect to edge95:11016 from gnugk227:0 successful 
  2008/08/28 14:27:31.436        5        ProxyChannel.cxx(5088)        
ProxyH(5) total sockets 4 
  2008/08/28 14:27:31.437        5                 job.cxx(426)        JOB      
  Job H245Connector deleted 
  2008/08/28 14:27:31.437        5                 job.cxx(415)        JOB      
  Worker threads: 21 total - 19 busy, 2 idle 
  2008/08/28 14:27:31.511        5            yasocket.cxx(783)        
ProxyH(5)        1 sockets selected from 4, total 4/0 
  2008/08/28 14:27:31.511        5        ProxyChannel.cxx(623)        H245s    
    Reading from T150:5559 
  2008/08/28 14:27:31.512        4        ProxyChannel.cxx(1093)        H245    
    Received: request terminalCapabilitySet { 
  ................. 
  2008/08/28 14:27:31.513        4        ProxyChannel.cxx(4487)        H245    
    Request: terminalCapabilitySet 
  2008/08/28 14:27:31.581        5            yasocket.cxx(783)        
ProxyH(5)        1 sockets selected from 4, total 4/0 
  2008/08/28 14:27:31.581        5        ProxyChannel.cxx(623)        H245d    
    Reading from edge95:11016 
  2008/08/28 14:27:31.681        4            yasocket.cxx(656)        H245d    
    edge95:11016 Error(0): Timeout 
  2008/08/28 14:27:31.693        5            yasocket.cxx(783)        
ProxyH(5)        1 sockets selected from 4, total 4/0 
  2008/08/28 14:27:31.693        5        ProxyChannel.cxx(623)        H245d    
    Reading from edge95:11016 
  2008/08/28 14:27:31.693        2        ProxyChannel.cxx(631)        Proxy    
    edge95:11016 NOT TPKT PACKET! 
  2008/08/28 14:27:31.693        5            yasocket.cxx(783)        
ProxyH(5)        1 sockets selected from 4, total 4/0 
  2008/08/28 14:27:31.693        5        ProxyChannel.cxx(623)        H245d    
    Reading from edge95:11016 
  2008/08/28 14:27:31.693        2        ProxyChannel.cxx(631)        Proxy    
    edge95:11016 NOT TPKT PACKET! 

  Syslog on the edge95 showed that the edge95 did receive and respond to the 
request for terminalCapabilitySet from the gnugk227. 

  We have had many calls by Tandberg endpoints via the gnugk227 without problem 
except for this particular model, Edge 95 MXP. 

  Any idea what could be cause of the Timeout and NOT TPKT PACKET? 

  Thanks in advance for all help. 

  Cheers, 
  Paul
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