RE: J0/J1 encoding issues

["Brungard, Deborah A, ALASO" <dbrungard@att.com>]

As Jonathan says, the current G.707 is using T.50. And there's more. Example, for J0, one currently needs to support:
- previously defined C1 (repeating one-byte)
- T.50 (with format of G.707)
- no J0 (for equipment not supporting).

So already we have defined multiple applications for this byte. Not to say, there will be not any new ones. Even ITU knows, it never is final;-)

For supporting LMP's use, we need to understand the scenarios of use (sounds familiar to T1X1.5 participants?) e.g. intra-operator, inter-operator, applied for equipment installation verification or service connection verification, etc. And hardware implications.

Actually, G.831 defines multiple uses depending if inter or intra - including for intra-operator, support of routing/path set-up (and G.831 was done years ago).

Suggest, for timing, as a T1X1.5 meeting is dec 4-dec 5, contribute the proposal for the meeting and we can start the discussion. The next ITU-T meeting is in January. If the LMP editors need help on our T1X1.5 process, just ask.

Deborah

-----Original Message-----
From: Jonathan Sadler [mailto:jonathan.sadler@tellabs.com]
Sent: Monday, November 18, 2002 7:59 PM
To: ccamp
Subject: J0/J1 encoding issues


All -

As mentioned at the CCAMP meeting, the SDH trace bytes (J0/J1/J2)
have restrictions not only on the length of a trace message and on
the bits usable in a octet, but also on whether the payload in the
message uses printable ASCII characters.

The requirements for J0/J1/J2 (found in G.707) state the trace
message payload must utilize the printable characters defined in
T.50.  Two current LMP drafts (draft-ietf-ccamp-lmp-test-sonet-sdh &
draft-lang-ccamp-lmp-bootstrap) utilize encodings that are not
consistant with this requirement.

This message is being sent to document this issue.  It is not a
statement that no other issues exist -- I expect that the appropriate
experts in the ITU will review the rest of these two drafts and
provide appropriate comment.

Jonathan Sadler
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