Signaling group question

[booman]

Hi - I have a trunk group set up with two IDSN-PRIs in it, each with its own D-channel. The strange thing is that each trunk has its own signaling group. Why it was set up this way is beyond me (before I got here). All the other trunk groups that I've set up have all trunks on the same signaling group, with two D-channels specified from two of the trunks. I need to add two more trunks to this trunk group, and planned on ordering them without D-channels.

Is there any reason why I can't do the following:

1. Change one of the signaling group's Associated Signaling field from "y" to "n", thus changing the form to allow a secondary D-channel to be entered.

2. Enter the D-channel from the second T1 as the secondary D-channel.

3. Change the Trunk Group form to reflect the new signaling group, and add the 48 new ports from the two new T1s.

I'm guessing that at least the second trunk will go out-of-service while I do this. Any thoughts on if I'll lose the first one too? (I'm going to do this after hours when there is little or no traffic)

 

[RTMCKEE]

I believe the D-Channels must be in the same "group" from the Provider.

When you have a primary d and a secondary d, only one is the active d at any given time. If you put two different D-channels in the same sig group, the one that is not active will take down all the b's associated.

RTMCKEE

 

[lopes1211]

You can't do that without the involvement of your LEC. You need them to program their end as well, you can't just change the definity programming and have it work as primary/secondary instead of 2 primarys. You will have to take both circuits out of service.

-CL

 

[booman]

Hmm - I see. Well could I just add these two new trunks to the trunk group, and assign one to one signaling group and the other to the other?

 

[mikeydidit]

It looks like what they done before you got there, is make a primary d signaling channel from one PRI and a secondary d channel from the second PRI. This gives you some redundancy for your trunk group. In the event your primary should fail your secondary will handle the associated signaling needed for your group. Lopes1211 is also correct that you LEC will have to program their end the same you program yours. You may want to add to your existing group. I don’t believe that when you add members to an exsisting group, you other members will be down. If you add 2 more PRI’s and want another trunk group, just make another primary and secondary d channel (one on each) and take off with your new trunk group.


Mikey