home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.protocols.tcp-ip:4388 comp.dcom.isdn:533
- Path: sparky!uunet!aria!marc
- From: marc@aria.Ascend.COM (Marco S Hyman)
- Newsgroups: comp.protocols.tcp-ip,comp.dcom.isdn
- Subject: Re: TCP/IP over ISDN
- Message-ID: <3302@aria.Ascend.COM>
- Date: 11 Sep 92 18:45:56 GMT
- References: <1992Sep8.183030.330@gandalf.ca> <1992Sep10.040648.20853@dumbcat.sf.ca.us> <1992Sep10.143836.11131@cbfsb.cb.att.com>
- Followup-To: comp.protocols.tcp-ip
- Organization: Ascend Communications, Alameda, CA
- Lines: 39
-
- In article <1992Sep10.143836.11131@cbfsb.cb.att.com> deej@cbnewsf.cb.att.com
- (david.g.lewis) writes:
- > In a previous article I wrote:
- > >The "mandatory" called party number isn't in setups that come from a
- > > Definity Generic I PBX.
- >
- > Over a PRI it certainly is. If a SETUP message is sent by a PBX to the AT&T
- > network and does not include a Called Party Number IE, the call attempt will
- > be cleared. On the terminal side of the Definity, the terminal may receive
- > information via Keypad IEs.
-
- Uhh, this may be a function of the funny way we use our Definity. It's the
- best T1/PRI test took we have (in addition to being a great PBX). We have
- PRI on both the Network and Terminal side, an AT&T PRI from the network and
- several (6 or 8) internal T1 lines, some configured as PRI, with the PBX
- told they are tie lines. Each internal line is a trunk group of its
- own and is dialed by using the trunk group. When dialing from one PRI trunk
- group to another PRI trunk group the Called Party Number IE on the answering
- side exists but has no number.
-
- > Again, to get back to the original thread, certain IEs are designated as
- > usable for user to user information transfer. These include UUI, High Layer
- > Compatibility, Low Layer Compatibility, subaddress IEs, and Codeset 7 IEs.
- > If you attempt to use anything else to transfer user to user information,
- > there is no guarantee, explicit or implied, that it will be delivered the
- > way you want it - or that it will be delivered at all.
-
- Agreed. However, given the heterogeneous nature of the network there is
- currently no guarantee that any of the above will work between any two
- arbitrary endpoints.
-
- I guess I'm coming down on the side of making a connection and performing
- control inband. TCP/IP over xxx over ISDN. PPP is overkill for xxx but
- will certainly work.
-
- // marc
- --
- // work: marc@ascend.com uunet!aria!marc
- // home: marc@dumbcat.sf.ca.us pacbell!dumbcat!marc
-