View source for Redundancy & High Availability:Software:Signaling Protocols

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 [[T1,_E1,_and_J1_interfaces|E1/T1]] or [[DS3_interfaces|DS3]] failure. Also, the [http://www.telcobridges.com/en/tmg3200.aspx TMG3200-DS3] and [http://www.telcobridges.com/en/tmg3200.aspx TMG3200-STM1] have 2 signaling ports that can be configure as MTP2 links.

The following example shows the redundancy of [[MTP2_Layer|MTP2]] links.

[[Image:Ha_TMG3200_MTP2.png|TMG3200 MTP2 Redundancy Setup]]

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

[[Image:Ha_TMG3200_MTP2_Link_Down.png|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). 

[[Image:Ha_TMG3200_M2UA.png|TMG3200 M2UA Redundancy Setup]]

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

[[Image:Ha_TMG3200_M2UA_Network_fail.png|TMG3200 M2UA Redundancy Setup]]

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

[[Image:Ha_TMG3200_M2UA_Peer_fail.png|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 ISDN stacks load shared between them (CAS and SIP can be configured in a similar fashion):

[[Image:Ha_TMG7800_TDM_Load_Share.png|TMG7800 TDM Interfaces Load Sharing]]

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

[[Image:Ha_TMG7800_TDM_Load_Share_Fail.png|TMG7800 TDM Interfaces Load Sharing With Telecom Unit Failure]]


=== SS7 ===

TelcoBridges [[SS7]] stack has a multitude of redundancy mechanism that can fortify a [[TMG7800]] system against failure.
*[[MTP2_Layer|MTP2]] Link Redundancy
*[[MTP3_Layer|MTP3]] Layer is shared between multiple telecom units
*[[ISUP]] Layer Redundancy

With the TMG7800, it is recommended to configure the [[Tmedia]] system with at least 2 [[MTP2_Layer|MTP2]] links each on different telecom units and 2 [[ISUP]] each one stack on different TMG7800 telecom units.

In the following example, the system [[SS7]] will still be operational whether a link, stack or [[TMG7800]] telecom units failure.

[[Image:Ha_TMG7800_SS7_Network.png|TMG7800 Recommended SS7 Network Configuration]]


=== SIGTRAN ===

The [[TMG7800]] can really create a fully redundant [[SIGTRAN]] system, it supports multiple destination addresses, multiple peers.

The following example shows a [[SIGTRAN]] system with 2 [[MTP2_Layer|MTP2]] links, 2 [[M2UA]] links and 2 [[M2UA]] peers (Note: [[M2PA]] and [[M3UA]] have similar features). 

[[Image:Ha_TMG7800_M2UA.png|TMG7800 M2UA Redundancy Setup]]


[[Category:Tmedia_High_Availability|Signaling Protocols]]