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- From: cstorry@gandalf.ca (Chuck Storry)
- Subject: Re: BONDING and T1 Letter Ballot
- Message-ID: <1993Jan26.164255.26315@gandalf.ca>
- Keywords: BONDING,ISDN
- Organization: Gandalf Data Ltd.
- References: <C19x6v.CLG@ms.uky.edu> <1993Jan25.054421.22650@scott.skidmore.edu> <Kevin.Kershaw.4@StPaul.NCR.COM>
- Date: Tue, 26 Jan 1993 16:42:55 GMT
- Lines: 59
-
- In <Kevin.Kershaw.4@StPaul.NCR.COM> Kevin.Kershaw@StPaul.NCR.COM (Kevin Kershaw ) writes:
-
-
- >Thanks to all who respoded to my inquiry on BONDING and T1 Multi-
- >rate capability. Your information has been very helpful.
- >As a follow on issue, I would be interested in obtaining more
- >information on the BONDING protocols. I am currently supervising
- >a development that provides both BRI and PRI support for devices
- >attached to our line of communications processors. We have
- >implemented a proprietary end-to-end protocol between our own
- >devices that allows multiple B-channels to be brought into
- >service to increase the end-to-end bandwidth. This capability is
- >dynamic (channels are brought into and out of service as needed)
- >and can span channels on combinations of BRI and PRI interfaces.
- >This product was designed almost 2 years ago so the BONDING work
- >was unknown to us at that time. I would like examine whether it
- >makes sense for us to move to BONDING in future releases. Does
- >anyone know where I might obtain the specs for the BONDING
- >procedures?
-
- There are other "standards" in addition to BONDING to consider (or perhaps
- not). They include CCITT H.221 and I belive that Australia has one.
-
- I heard a rumour that CCITT rejected the BONDING spec as the basis for
- inverse muxing in favour of a revised/modified H.221. Anyone know the
- details or validity on this ?
-
-
-
- >The big difference with ISDN on this point is that you are going
- >to pay your service provider for each additional channel you
- >bring on line. If you are running 2 B already (128K) and another
- >64K on line will cover your needs, why pay for another 128K?
-
- This brings me to BONDING mode 3. Do we really need to add bandwidth on
- 8khz increments ? If you add another B channel why not give all 64K to
- the user ?
-
- (For those not in the know BONDING consists of 4 modes:
- mode 0 - inband negotiation (no B channel aggregation)
- mode 1 - inband negotiation , channel equalization and subsequent aggregation
- (but no monitoring for loss of sync and no end-end com channel)
- mode 2 - mode 1 and overhead framing to determine synchronization status
- and an end-end communication channel in order to dynamically
- add and remove channels (and maintenance : loopback, etc)
- mode 3 - as per mode 2 but bnadwidth is added in 8k increments rather than
- "B" channel (56/64k) increments.
-
- Note: this is my interpretation of the Spec and is not an officially
- sanctioned synopsis of BONDING.
-
- >Kevin Kershaw DAMN IT'S COLD OUT......
- >NCR Network Products Division
- >St. Paul, MN.
- --
- Chuck Storry, Principal Designer CAnet: cstorry@gandalf.ca
- Gandalf Data Ltd. Voice: (613) 723-6500
- 130 Colonnade Rd So, Nepean, Ontario Fax: (613) 226-1717
- Canada K2E 7M4
-