H323 trunk vs Qsig trunk

Unanswered Question
Chris Deren Sun, 04/19/2009 - 06:30

H.323 Trunk is an IP (virtual) connection between 2 devices.

QSIG is an ISDN protocol that allows for TDM integration between 2 systems, this requires a physical connection (cable, cards) between the 2.

QSIG was the best solution for PBX integrations in the TDM days where IP protocols were not available.

These days new PBXes support IP protocols and H323 or SIP trunks are the best options.

If your systems support H323 (which obviously it does) then there is no reason to go to QSIG.

HTH, please rate all posts!


acharyr123 Tue, 04/21/2009 - 19:38

Hi Friend,

We want to have similar integration between Alcatel PBX & Cisco 2811 over H.323

Can u plz share what are the parameters to be configured on both the sides!!! I am in deep trouble so asked help from you....


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