RFC 3108, "Conventions for the use of the Session Description Protocol (SDP) for ATM Bearer Connections", May 2001

Errata ID: 8446
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Robert Hanton
Date Reported: 2025-06-03
Verifier Name: Andy Newton
Date Verified: 2025-11-01

Section 5.6.3.2 says:

When present, the 'silenceSupp' attribute is used to indicate the use
or non-use of silence suppression.  The format of the 'silenceSupp'
media attribute line is as follows:

a=silenceSupp: <silenceSuppEnable> <silenceTimer> <suppPref> <sidUse> <fxnslevel>

It should say:

When present, the 'silenceSupp' attribute is used to indicate the use
or non-use of silence suppression.  The format of the 'silenceSupp'
media attribute line is as follows:

a=silenceSupp:<silenceSuppEnable> <silenceTimer> <suppPref> <sidUse> <fxnslevel>

Notes:

There is a space after the colon in the format of the 'silenceSupp' attribute. This does not match the a=<attribute>:<value> format specified in RFC2327 (which would have been normative at the time) or the two RFCs that superceded it, or the corresponding ABNF.

It also does not match the ABNF given for the attribute itself in section 9 of the RFC (RFC3108), which is "silenceSupp" ":" silenceSuppEnable space silenceTimer space suppPref space sidUse space fxnslevel / .

While I am submitting this errata as an example of the issue for review, a considerable number of other attributes in the document also exhibit this same issue in their format definitions. If this errata is accepted I can file matching errata for all other similar errors.

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