Asterisk TDM to SIP and SIP to TDM Converstion Time

Dear All we are using asterisk as PRI to SIP gateway. There is 6 second delay in dialing. Please suggest how i can reduce that delay. how much time asterisk take to convert TDM call received on PRI(TDM) to SIP(VOIP). please suggest how i can fine tune or reduce that delay.

Packetisation delay is, typically 20ms. There will be some extra delay due to time-space-time switching, as in any TDM system, but this should be small compared with the packatisation delay.

You need to provide detailed logs to work out where you are losing your 6 seconds, but I presume that it is something like end of number being timed out, rather than determined algorithmically.