Digital Private Network Signalling System: Difference between revisions

Revision as of 01:09, 20 December 2014

Revision as of 22:49, 10 January 2015

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==Practical Considerations==

As HDLC can operate successfully in quite poor (errored) data environments, DPNSS will work over a 2 MbMbit/s link running without proper synchronisation (plesiochronously) and over poor quality connections (including badly terminated connectors). When setting up PBXs to run a DPNSS connection one end must be defined as the primary or 'A' end. This is a protocol requirement and has nothing to do with link synchronisation. However, such badly synchronised links were frowned upon because of the problems associated with sending faxes and/or other modem based communication which were not specifically identified within the protocol.

==DPNSS and VoIP==