PRI T1 primary and back-up d channel limitiations 2

[BigBenjaBear]

Does anyone know if there is a limitation on the primary and backup d channel configuration for pri service. Suppose I have 6 pri t-1's with a primary and back-up d-channel and I want to add 16 more t1's to this arrangement. I am looking for an answer as it realtes primarily as it relates to call center traffic on an Avaya PBX

Ben Crawford

 

[ISDNman]

My guess is that it

1) Varies state to state according to tarrif

2) Wil be somewhat dependent on what the Avaya can support.

I'd check on #2 first.

Good luck

 

[johnpoole]

my limit on a single dch is 23 pri's, with or without a backup, i am in a merridian switchm but the limit is set by the dms 100 central office switch. i am running 12 with a single dch and bdch on a very busy route without problems

john poole
bellsouth business
columbia,sc

 

[lopes1211]

20 ds1's is the limit for a signalling group in a g3r. Personally, I would seperate them into 2 trunk groups from the lec anyway to get 4 D channels for some greater redundancy.

-CL

 

[johnpoole]

i agree with that, never put all your voice on one d with a backup.. if the pri with the primary fails, the switchover to the backup could take several minutes, calls don't drop, just no new calls and the caller gets a busy.. with dual routes, that transfer time goes away, d fails, trunks a switches to backup, group 2 takes calls.. ie group 1 backs up group 2, group 2 backs up one.. my merridian has a total of 31 pri's with 20 d's.. sounds like a lot but i have a backup for each route, and routes to a lot of different carriers and remote switches

john poole
bellsouth business
columbia,sc

 

[BigBenjaBear]

Thanks everyone...it seems that the limitations are tied to both the PBX and the LEC, or so it seems. What we decided to do was to add 5 to the existing six and then create a second group of 11 with a primary and backup. Since it is going into an Avaya G3R, lopes1211 you information followed along the lines that we thought. Thanks again to all.



Ben Crawford