atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services T1's, CSU's and DSU's Turning a DS3 into 28 T-1's

Sentra, it's DPC (destination point code) it identifies your switch in the ss7 network. Again, I'd be surprised if your equipment can handle ss7 connectivity. PRI is probably a better choice for call set-up.

DPC is short for Destination Point Code. It identifies your switch from other SS7 switches and is used to route calls to you as well as establish SS7 service to your switch.

One very simplistic way to think of SS7 is as if you were looking right at a person, face to face.

You see the person (T1 circuit) and you can talk to the person (SS7). If SS7 goes down you can still see each other, but you can't communicate with each other.

SST is right. In most cases ISDN service or even standard T1E&M is the way to go, unless you are running a Central Office type switch (Lucent 5E or Nortel DMS-100).

You guys are the best! FOr some reason the carrier is only giving me the options of SS7 or PRI. As I said before, both are too new for my equipment. I am going into a conference with the carrier to put in the T1E&M wink, which is what I ordered. Thanks again for all of your help!

OK, I found out what the BIG problem is. The underlying carrier is PNG, Powernet Global. They use a switch that can only use PRI or SS7 signaling. Is there a solution to switch ss7 or pri to the E&M wink?

If the provider can give you ISDN (PRI) service and your equipment has the capability to work with ISDN service, that would be the way to go only if your equipment can handle ESF/B8ZS circuits.

I would love to know why PNG can't provide you with standard T1E&M service. It's a real bread & butter format.

You could also shop around and kick the tires of other service providers to see if they can give you a DS3 with D4/AMI T1s and T1E&M signalling at a similar or lower cost.

It can't hurt to try! :thumb:

thanks dex and I appreciate all of the help you guys have given me. Apparently PNG uses a switch that only supports PRI and ss7 signaling. They do not have the physical equipment needed to provide us with D4 AMi. We are looking at replacing the DS3 with T-1's from the same provider. The only reason we even went with the DS3 in the first place was to get Paetec's pricing format out to us with a loop cost that is bearable for us because we are in the middle of nowhere. Back to the drawing board... Thanks again!

Interestingly enough, Paetec has an OPS site in the same building my office is located in.

I know what they do have for a switch in their space and it does support T1E&M.

Assuming that they use the same type of switch throughout their network, maybe they can give you a good price on T1E&M trunks.

Try using the Carrier Access Widebank 28 multiplexer. Very easy to operate, multiple framing and encoding choices, Redundant controller and power supplies. Very affordable. You can find them on Ebay.