T1 and PRI Questions

[GroundWire]

Hey folks.. I've got some questions about the way a Merlin Legend handles T1 circuits.

1) Why is it necessary to use a CSU with the 100D module and a straight DS1, when it doesn't appear you need one when using a PRI... or am I mistaken here?

2) While looking around in the documentation, I've seen what looks like might be some AT&T propriatary T1 stuff. (When dealing with dial plans and routing) I've got a T1 (B8ZS, ESF - immediate-wink start, dialtone comes from remote end) that is provided by Qwest, and dialtone comes from Worldcomm.

Any reason why this would not work with a 100D module?

3) What is the typical configuration for a 100D module, all of the lines (801-824 for instance) get put into a line pool, and when you hit 9 to get an outside line, you get whatever line is next?

4) What are the minimum system requirements for using a 100D module. If I'm reading correctly, It appears to run on an R4, using a CKE3 processor.. is this correct?

Thanks for taking the time to answer!!

- Joel

 

[killbox]

CSU's are standard and act like a surge protector really. Rather a CSU fry from a lightning hit that a card.

For 1 instance, some AT&T T1's do not want to see the 1 when dialing LD, so the switch will delete 1 digit as a PRI under special service, delete digit, pattern 5.
Are you setting up a PRI or a DS1 with Qwest. If it's a PRI, call the provider of the T1 and ask the switch type. They'll tell you, 5E, DMS, etc. I know Qwest works because I have a couple out there.

If you label each trunk port (T1 channels) as 801 -824, you'll see the different channels used when you start dialing.

The minimum is actually R3 as per Avaya, but for a PRI it has to be coming out of a 5E switch they said. I have a customer w/R3 and we put a PRI in about 6 months ago.

KILLBOX

 

[GroundWire]

It's a DS1 for sure. They don't even have phone numbers assigned to the circuit, as it's used completely for LD outcalling.

So then - can I build a test system that will work without a CSU, and then put the CSU in once they actually want to buy the system, and we install it permanently?

I'm asking because I don't have one, and I'd hate to have to buy one if it's not actually necessary. (I do understand the concept though, these phone systems get a little wall-mounted UPS too.. so don't think that I'm trying to cut costs, at the expense of some expensive electronics.)

Thanks for your assistance!


- Joel

 

[FoneDude66]

I was under the impression that the CSU/DSU had to be there for legal reasons. If you were to call Avaya for support and they were somehow to find out that there is not a CSU present, then they will not support you. I am speaking only from hear-say and I have not ever actually experienced this situation.

 

[killbox]

That's true also fonedude. But all aside from the Avaya BS, it's not needed. I've had telrads, avayas, nec's out there without a CSU. Yes, dealers don't support and but it will work.

And groundwire, you are just cutting a cost. They're so cheap. Maybe you can get a used or refurbished one for real cheap.