[asterisk-dev] SIP Interoperability in Asterisk?

[John Lange]

http://www.sipforum.org/component/option,com_docman/task,doc_download/gid,83/Itemid,75/

The above linked document describes how SIP should be implemented to
ensure interoperability between IP PBX type systems.

First, I just want to make sure the Asterisk community is aware of this
document.

Second just curious what the status of these items are within Asterisk?
How close is Asterisk to complying with these requirements?

Here is a brief overview of whats inside.

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The specific areas where this document provides implementation guidance
include:
•  Specification of a reference architecture that describes the common
network elements necessary for Service Provider to IP PBX peering for
the primary purpose of PSTN call origination and termination.
•  Specification of the basic protocols (and protocol extensions) that
must be supported by each element of the reference architecture.
•  Specification of the exact standards associated with these protocols
that must or should be supported by each element of the reference
architecture.
•  Specification of standard methods for negotiating protocols, protocol
extensions, and exchanging capability information between endpoints.
•  Specification of methods of formulating protocol messages where
multiple legitimate implementation options exist.
•  Definition of an authentication scheme that provides user security
and billing traceability to a single Enterprise.
•  Specification of minimum requirements and consensus methods for codec
support, packetization intervals, and capability negotiation.
•  Specification of a consensus method for handling fax and modem
transmissions.
•  Specification of minimum requirements and consensus methods for
handling echo cancellation.
•  Specification of a consensus method for transporting DTMF tones.
•  Specification of a consensus method for conveying traffic priority to
the Service Provider in order to enable proper QoS delivery.
•  Specification of a basic set of guidelines for interfacing with an IP
PBX when Network Address Translation and/or packet filtering devices are
utilized in the communications path.
•  Definition of a basic security model based on existing standards to
authenticate and authorize utilization of the Service Provider’s
resources by an IP PBX.


John