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Redundancy & High Availability:Software:Signaling Protocols

Revision as of 15:46, 10 February 2011 by Cbilodeau (talk | contribs) (add cas, isdn, sip text and example)

The most recent signaling protocols have inherent redundancy and high availability features. For the other signaling protocols, there are still way to improve service availability.

TMG800 / TMG3200 Series

SS7

TelcoBridges recommends to use 2 timeslots as MTP2 links on different line interface. This will protect against E1/T1 or DS3 failure. Also, the TMG3200-DS3 and TMG3200-STM1 have 2 signaling ports that can be configure as MTP2 links.


The following example shows the redundancy of MTP2 links.

TMG3200 MTP2 Redundancy Setup

The SS7 network is still available if 1 link goes down.

TMG3200 MTP2 Redundancy Setup With Link Down


SIGTRAN

SIGTRAN supports multiple destination addresses and peers to create redundancy.

The following example shows how M2UA can take advantage of the Tmedia dual VoIP interfaces to create a redundant system (Note: M2PA and M3UA have similar features).

TMG3200 M2UA Redundancy Setup

The M2UA system is still operational even if there is a network failure.

TMG3200 M2UA Redundancy Setup

The M2UA system is still operational even if a M2UA peer goes down.

Power Distribution Recommended Setup


TMG7800

CAS/ISDN/SIP

With TMG7800 system composed of multiple telecom units, it is recommended to spread the TDM connections between the providers between the telecom units.

The next example shows 2 TMG7800 Telecom units connected to 2 providers with their DS3 load shared between them:

TMG7800 TDM Interfaces Load Sharing

Even if a telecom units fails, all the providers will be accessible through other unit:

TMG7800 TDM Interfaces Load Sharing With Telecom Unit Failure


SS7/SIGTRAN