PRI Protocol NI2 or SL1?

[BrokenRecord2]

Can anyone tell me what would be the preference in protocols for a PRI connected to a Nortel CO? SL-1 or NI2?

Is there a reason why I would rather use NI2 instead when talking Nortel to Nortel?

Thanks in advance!

 

[mikeyb123]

we use sl1 for our nortel to nortel stuff

It's not getting any smarter out there. You have to come to terms with stupidity, and make it work for you.

 

[phonz1]

SL1 protocol is what the CO uses to talk using a DTI, NI2 is the newest standard for PRI, aka: national. If you have a d channel on your circuit, I would specify NI2 to the CO.

 

[EddieDuece]

We also use NI2.

 

[curtismo]

To be sure you really need to talk to your carrier to find out what they have set up for you at the CO. For example, we have a PRI to our LD carrier and they specify D250 (DMS-250). Carriers usually won't give you a choice. For example, my local PRIs go to a GTD5 switch, so my only choice is NI2. If my numbers were on the DMS-100 (which happens to sit across the aisle in the CO from the GTD5) I know they insist on D100 protocol.

 

[BrokenRecord2]

Thanks for your replies but what I was really looking for was why would I want to switch to NI2 instead of a Nortel Protocol when talking Nortel to NOrtel? Do I get the same things like anti tromboning, MCDN, etc...

I have done it both ways in the past I am just trying to figure out if I should be doing NI2 most of the time and why? In my head I would think that there are some advantages of speaking a Nortel language when connecting two Nortel switches. If I were to connect to M1's by point to point I would do SL1 on both sides. Why wouldn't I do NI2 if its better? Just thinking out loud here.

Thanks again guys!

 

[curtismo]

One reason to do NI2 when talking to a Nortel CO switch is that I believe Caller Name Delivery is only available in the NI2 protocol (25.40B and above).

 

[hawks]

I've always went NI2 as long as the CO can provide it. I use the SL1 Protocol when doing a private network PBX to PBX.