PtP T1 - Can it be used for data?

[bryandj23]

Hi all. My company is reinvestigating our internet options, and in talking with the owners about our options, they brought up the point that we're paying a little over $500 per month for a T1 between our two offices' Magix(es). Currently, we also have another expensive connection between the two offices just for data. In our remote office, there are 4 incoming POTS lines, and a maximum of 4 people simultaneously at the office at a given time. I'm wondering if it is possible (and what would it take) to use a portion of that T1 for data? I've read on the forums that voice and data can be split out, but am I correct that it requires an external DSU?

Here's what the main office's T1 configuration is at:

A DS1 SLOT ATTRIBUTES

A Slot Type Format Supp Signal LineComp
A 5 PRI ESF B8ZS DMI-MOS 1

A CSU/DSU ATTRIBUTES

A Slot 5
A CSU: Activated
A Assigned Channels:
A DSU: Deactivated
A Data Port 1
A Receive Clock: DTE
A Invert Transmit Clock: No
A Invert Receive Clock: No
A Invert Transmit Data: No
A Invert Receive Data: No
A Rate: 56 kbps
A Assigned Channels:
A Data Port 2
A Receive Clock: DTE
A Invert Transmit Clock: No
A Invert Receive Clock: No
A Invert Transmit Data: No
A Invert Receive Data: No
A Rate: 56 kbps
A Assigned Channels:
A PRI INFORMATION



A Slot 5 Switch: MERLIN-Ntwk

A System: By line

A BchnlGrp #: Slot: TestTelNum: NtwkServ: Incoming Routing:
A 80 5 ElecTandNtwk Route Directly to UDP

A Channel ID: 23 22 21 20 19 18 17 16 15 14
A 13 12 11 10 9 8 7 6 5 4
A 3 2 1

A Line PhoneNumber NumberToSend
A 8121
A 8122
A 8123
A 8124
A 8125
A 8126
A 8127
A 8128
A 8129
A 8130
A 8131
A 8132
A 8133
A 8134
A 8135
A 8136
A 8137
A 8138
A 8139
A 8140
A 8141
A 8142
A 8143

Thanks for the help - you guys are great!

 

[phonesrus]

Yes you can, a Paradyne 3160 (or other csu/dsu)will work. Since you have a PRI between the sites you must keep channel 24 for the voice data channel (d-channel) but you could drop a block of channels out for your data needs (xy thru 23) depending on your needs and keep 01 thru xx for voice.
You will, of course, need to remove channels xy thru 23 from your "b" channel group 80. But it is definitely do-able.

 

[bryandj23]

I've always thought this was possible. Is there a way of knowing how many channels are needed for voice? This is why I mentioned the 4 incoming POTS and the 4 people in that office. (There's really only 2 people there, but from time to time someone from the main office goes to our other location to "visit"). I'd like to use as much of that T1 for data as I possibly can.

Thanks for the info. I've got my research cut out for me today!

 

[merlinman]

If your T1 Card is a 100-DCD, the "DSU" is built in, and can do that "Split Out" function for you.

Before I make an estimate of how many channels for voice, I need to know if the "OFF SITE" location uses the Voice Mail in the HOME OFFICE.

 

[bryandj23]

Merlinman...

Yes, the remote site uses the Merlin Messaging system here at the home office. The T1 card is a 100DCD.

 

[merlinman]

I would say that you would want at least 6 channels for voice then.

You could always start with some number and see how that worked.

So, since you have a 100-DCD, then all you need is some programming and re-arranging.

But, sometimes there are issues with the 100-DCD and Data, depending on the Release of the Magix.

I had a PROBLEM using R4.0 Magix.

Then, we had to go to EXTERNAL DSU's.

I believe there is some info on Avaya's web site.

 

[bryandj23]

merlinman...

Thanks much for the info. I'll have a look around avaya's site to see what I kind find. That's really good to know - I can completely reorganize the network in that office, and save a ton by eliminating some services from our ISP.

By the way, System Inventory shows Magix 1.5 V6.0 on slot 00.

 

[bryandj23]

Shoot...I almost forgot a point that may effect how many channels I can use....

Calls to the remote office on any of the 4 POTS lines go thru the T1 to our main office to be answered by the receptionist.

Not sure if this makes a difference or not.

 

[bryandj23]

I would still need a DS1 router on each end to convert the DCD100's data cable to ethernet though, correct?

 

[bryandj23]

Ok. I think I've got it. After much of the day reading various posts, manuals, etc...I think I got it.

First, I'll need to pull some T1 channels out of BchnlGrp80 to use for Data. I'll assign those T1 channels to Data Port 1 on both ends.

I'll need two routers to bridge between v.35 on data port 1 and ethernet connections to our LAN switches.

That's it? Almost sounds too easy.

 

[bryandj23]

Bump!

Hi All. Am I correct in my previous post that I can just connect a router to the v.35 cable coming off the 100DCD card?

We have a few Cisco 1605r's laying around. I'm thinking I could pop WIC-1T cards into these, connect them to the PBX and the ethernet switches.

Sorry for all of the questions. I'm trying to put together a final cost for what it's going to cost our company with the two proposals we've received from AT&T and our cable company. (T1 vs. Fiber).

 

[dagwoodsystems]

You got it.

The only thing is that those blocky "Winchester style" V.35 connectors can be a bit of a bother, and there IS a distance limitation on how far they can be extended (please just use what Cisco provides with their WICs). Plan on having the Cisco close to the PBX.

 

[bryandj23]

That was my plan, Dagwood. Thanks for the info!