[comp.dcom.telecom] Information Wanted on Combination DID/DOD Trunk

0004526627@mcimail.com (The Network Group) (02/26/91)

Many years ago, I had a practice from the old Pacific Telephone or
A.T.&T that explained the circuit design of a combined DID/DOD trunk.

I am now attempting to get a combination inbound DID trunk with
outbound dialling. I don't really care about passing the PBX extension
number to the C.O. for billing purposes, just to make it a two-way
trunk. Has anyone been successful if getting this type of trunk?

On a related note, I am also trying to get E & M Type I terminations
for Centrex off of a 1A ESS machine. The folks at Pac Bell recited
Hymn # 12: "Well, we don't provide that because we haven't done that
before"!  I've heard this type of explanation many *many* times over
the last 25 or so years and it is still not acceptable.

If anyone can help with either of these two problems, or would care to
share experiences with obtaining these types of circuits, I'd surely
appreciate it.


Al Cohan    The Network Group   P.O. Box 5069
Mammoth Lakes, CA 93546    +1 619 934 6529
MCI MAIL: The Network Group / 452-6627

Disclaimer: If The Network Group ever paid me, only then would they be
entitled to my opinion.

K_MULLHOLAND@unhh.unh.edu (KATH MULLHOLAND) (03/11/91)

In a recent Digest someone asked:

> Many years ago, I had a practice from the old Pacific Telephone or
> A.T.&T that explained the circuit design of a combined DID/DOD trunk.

> I am now attempting to get a combination inbound DID trunk with
> outbound dialling. I don't really care about passing the PBX extension

UNH has a set of inbound/outbound trunks that we use for our operator
consoles.  No PBX extension information gets passed.  New England
Telephone's USOC code for these trunks is TFC.  They are designated a
CLT circuit (as are our DIDs).  Also associated is a USOC code of TJB.

The name of the trunks are flat business combination trunks with
touchtone.

Hope this helps.

Kath Mullholand   UNH Durham, NH.

bruce@camb.com (Barton F. Bruce) (03/15/91)

>> I am now attempting to get a combination inbound DID trunk with
>> outbound dialling. I don't really care about passing the PBX extension

In many places DID trunks are ONLY incoming. They have to let the CO
outpulse or tone the last N digits of the dialed number so the PBX
knows which station to ring.

Priced the way they are here, to protect the really over priced
Centrex service, you certainly don't want to waste any of these for
out going traffic.

The first ten or so cost $80 each. All beyond that are $40. A normal
two-way ground start trunk is $20.

BUT there is now a way to get two-way DID trunks at somewhat better
pricing depending on your mileage from the CO:

If they are ordered as a package delivered on T1, you get two-way
service.  TT is in there too. If you only want 15, tough, you still
pay the same as for 24.

There is a fixed component, and a mileage component. Now that
CO-LOCATION is happening, and nice folks like Met Fiber charge a flat
$425 to ferry a T1 ANYWHERE they cover in Metro Boston, there is a
mileage insensitive option.

Of course as soon as Teleport provides an alternate source of
dialtone, we may even get answer supervision and ALL other reasonable
requests simply by asking - eventually even from the RBOCs.

If your switch can do T1, and the CO is ESS, ask about two-way DID
trunks!