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- From: scott@labtam.labtam.oz.au (Scott Colwell)
- Subject: Re: BONDING and T1 Letter Ballot
- Organization: Labtam Australia Pty. Ltd., Melbourne, Australia
- Date: Wed, 27 Jan 1993 02:48:36 GMT
- Message-ID: <scott.728102916@labtam>
- References: <C19x6v.CLG@ms.uky.edu> <1993Jan25.054421.22650@scott.skidmore.edu> <Kevin.Kershaw.4@StPaul.NCR.COM> <1993Jan26.164255.26315@gandalf.ca>
- Keywords: BONDING,ISDN
- Lines: 34
-
- cstorry@gandalf.ca (Chuck Storry) writes:
- >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.
-
- The Australian standard referred to is AS 4046-1992 "Information Processing-
- Digital channel aggregation (n x 64)". There is also a draft standard for
- comment out at the moment which proposes some enhancements to the above
- standard and some refinements to clarify interpretations of it.
-
- It is simpler than H.221. The enhancements are related to providing a
- signaling channel based on HDLC and providing error performance
- monitoring for recovery of 'bad' channels etc.
-
- >(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)
-
- Basic AS 4046 provides this plus sync detection and recovery.
-
- >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)
-
- Pretty much what is in the draft proposes. (DR92238:S)
-
- >mode 3 - as per mode 2 but bnadwidth is added in 8k increments rather than
- > "B" channel (56/64k) increments.
-
- ??? I agree with Chuck ! Who wants this?
- --
- Scott Colwell Labtam Australia Pty. Ltd.
- net: scott@labtam.labtam.oz.au 41 Malcolm Rd., Braeside
- phone: +61-3-587-1444 Melbourne, Australia 3195
-