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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Sun, 24 Jan 1993 04:49:29 GMT
- From: goldstein@carafe.dnet.dec.com (Fred R. Goldstein)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Sprint Can't Do Switched 56k
- Message-ID: <telecom13.41.11@eecs.nwu.edu>
- Organization: Digital Equipment Corp., Littleton MA USA
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 41, Message 11 of 12
- Lines: 39
-
- In article <telecom13.28.6@eecs.nwu.edu>, eap@ora.com (Eric Pearce)
- writes:
-
- > We have a Sprint T1 with 16 channels for voice and 1 56k dedicated
- > data line. I want to add a single switched 56k line out of the same
- > channel bank (since there are spare slots). The reasoning behind
- > getting a CB was to be able to mix and match various types of service.
-
- > Sprint sales says they can't do it, as their "switched 56k network is
- > too advanced for PacBell and won't be able to talk to it" (we are in
- > northern CA). They also volunteered that AT&T and MCI are be able to
- > provide this even though Sprint can't. Does this make any sense?
-
- Huh? I specifically remember Sprint's ads touting that their domestic
- network carries Switch 56 and speech equally and doesn't distinguish
- between the two. You get a T1 access into Sprint's POP and then can
- make speech or 56 kbps calls interchangeably. The one trick is that
- you may need to send the echo canceller canceller (not a repeat) tone.
-
- This does not make use of PacBell's Switched 56 at all. Indeed if
- PacBell is like New England Tel, then Switched 56 won't talk to Sprint
- -- Switched 56 from the Bell is classmarked as "in the data domain"
- and won't talk to trunks "in the voice domain" which includes Sprint.
-
- But if you have a PBX, its own 56 kbps data applique is probably
- compatible with Sprint Switched 56. As is a channel bank, using the
- standard "7/8" coding (V.110/56k). The signaling is inband tone, same
- a a voice call.
-
- BTW, this is probably what inspired me to play with "data over speech"
- on ISDN. We now have ISDN using speech calls carrying 56 kbps around
- the LATA, where NETel doesn't even have data trunks yet.
-
-
- Fred R. Goldstein goldstein@carafe.tay2.dec.com
- k1io or goldstein@delni.enet.dec.com voice:+1 508 952 3274
- Standard Disclaimer: Opinions are mine alone; sharing requires permission.
-
-