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Protocol Action: Conventions for the use of the Session Description Protocol (SDP)for ATM Bearer Connections to Proposed Standard
The IESG has approved the Internet-Draft 'Conventions for the use of
the Session Description Protocol (SDP)for ATM Bearer Connections'
<draft-ietf-mmusic-sdp-atm-05.txt> as a Proposed Standard. This
document is the product of the Multiparty Multimedia Session Control
Working Group. The IESG contact persons are Allison Mankin and Scott
This document describes conventions for using the Session Description
Protocol (SDP) described in RFC 2327 for controlling ATM Bearer
Connections, and any associated ATM Adaptation Layer (AAL). The AALs
addressed are Type 1, Type 2 and Type 5. This list of conventions is meant
to be exhaustive. Individual applications can use subsets of these
conventions. Further, these conventions are meant to comply strictly with
the SDP syntax as defined in RFC 2327.
SDP will be used in conjunction with a connection handling /device control
protocol such as Megaco (H.248) and SIP to communicate the information
needed to set up ATM and AAL2 bearer connections. These connections
include voice connections, voiceband data connections, clear channel
circuit emulation connections, video connections and baseband data
connections (such as fax relay, modem relay, SSCOP, frame relay etc.).
These conventions use standard SDP syntax as defined in RFC 2327 to
describe the ATM-level and AAL-level connections, addresses and other
parameters. In general, parameters associated with layers higher than the
ATM adaptation layer are included only if they are tightly coupled to the
ATM or AAL layers. Since the syntax conforms to RFC 2327, standard SDP
parsers should react in a well-defined and safe manner on receiving session
descriptions based on the SDP conventions in this document. This is done by
extending the values of fields defined in RFC2327 rather than by defining
new fields. This is true for all SDP lines except the of the media
attribute lines, in which case new attributes are defined.
Working Group Summary
There was working group consensus in support of this proposal.
This document was reviewed for the IESG by Allison Mankin.