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RFC 4733, "RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals", December 2006

Source of RFC: avt (rai)
See Also: RFC 4733 w/ inline errata

Errata ID: 985
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Alfred Hoenes
Date Reported: 2006-12-19
Verifier Name: Tom Taylor
Date Verified: 2006-12-19

Appendix A, Table 8, says:

   +-------------+---------------------------------------+-------------+
   | Event Codes | RFC 2833 Description                  | Disposition |
   +-------------+---------------------------------------+-------------+
   |        0-15 | DTMF digits                           | RFC 4733    |
   |          16 | Line flash (deprecated)               | Reserved    |
   |       23-31 | Unused                                | [16]        |
   |       32-40 | Data and fax                          | [16]        |
   |       41-48 | Data and fax (V.8bis, deprecated)     | Reserved    |
   |       52-63 | Unused                                | [16]        |
   |       64-89 | E.182 line events (deprecated)        | Reserved    |
   |      96-112 | Country-specific line events          | Reserved    |
   |             | (deprecated)                          |             |
   |     121-127 | Unused                                | [17]        |
   |     128-137 | Trunks: MF 0-9                        | [17]        |
   |     138-143 | Trunks: other MF (deprecated)         | Reserved    |
   |     144-159 | Trunks: ABCD signalling               | [17]        |
   |     160-168 | Trunks: various (deprecated)          | Reserved    |
   |     170-173 | Trunks: various (deprecated)          | Reserved    |
   |     174-205 | Unused                                | [17]        |
   +-------------+---------------------------------------+-------------+

It should say:

   +-------------+---------------------------------------+-------------+
   | Event Codes | RFC 2833 Description                  | Disposition |
   +-------------+---------------------------------------+-------------+
   |        0-15 | DTMF digits                           | RFC 4733    |
   |          16 | Line flash (deprecated)               | Reserved    |
   |       23-31 | Unused                                | [16]        |
   |       32-40 | Data and fax                          | [16]        |
   |       41-48 | Data and fax (V.8bis, deprecated)     | Reserved    |
|  |          49 | Calling Tone                          | [16]        |
   |       52-63 | Unused                                | [16]        |
   |       64-89 | E.182 line events (deprecated)        | Reserved    |
   |      96-112 | Country-specific line events          | Reserved    |
   |             | (deprecated)                          |             |
   |     121-127 | Unused                                | [17]        |
   |     128-137 | Trunks: MF 0-9                        | [17]        |
   |     138-143 | Trunks: other MF (deprecated)         | Reserved    |
   |     144-159 | Trunks: ABCD signalling               | [17]        |
   |     160-168 | Trunks: various (deprecated)          | Reserved    |
   |     170-173 | Trunks: various (deprecated)          | Reserved    |
|  |     174-211 | Unused                                | [17]        |
   +-------------+---------------------------------------+-------------+

Notes:

Section 7 of RFC 4733, in the lower half of page 39,
specifies the initial content of the IANA maintained
audio-telephone-event-registry subregistry, as intended
for after publication of RFC 4733 -- see (1a) below.

Additionally, in Appendix A, on page 47, RFC 4733 restates this
information and summarizes the disposition of the legacy event
code assignments from the obsoleted RFC 2833, in particular,
Table 8 represents the current assignments and dispositions,
as per RFC 4733 -- see (1b) below.

Unfortunately, there are significant inconsistencies between
these two text blocks. Looking into Ref. [17] of RFC 4733,
the ietf-avt-rfc2833biscas draft, it turns out that both
text blocks are also inconsistent with that future RFC.
Consequently, the current IANA file is also affected.

from pending

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