[asterisk-bugs] [JIRA] (ASTERISK-21150) UDPTL Error Correction Scheme Negotiation Issue, Asterisk copies the Error Correction Scheme from T38 offer from remote peer even if UDPTL error correction scheme is set to NONE for that peer in sip.conf

[NITESH BANSAL (JIRA)]

NITESH BANSAL created ASTERISK-21150:
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             Summary: UDPTL Error Correction Scheme Negotiation Issue, Asterisk copies the Error Correction Scheme from T38 offer from remote peer even if UDPTL error correction scheme is set to NONE for that peer in sip.conf
                 Key: ASTERISK-21150
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21150
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/T.38
    Affects Versions: SVN
         Environment: x86_64 Debian Squeeze Distro
            Reporter: NITESH BANSAL
            Severity: Minor


Scenario: Asterisk receives a T38 invite which proposes some error correction scheme, Asterisk copies the error correction scheme from the offer and puts it in 200 OK. This behaviour does not change even if UDPTL error correction scheme is set to NONE for this peer.
Expected Output: Asterisk should respond with no error correction scheme if this peer has t38_udptl error correction scheme set to NONE.
Below is the reference from T38 spec:
""""T38FaxUdpEC is negotiated only when using UDPTL as the transport. This parameter can have
one of three values (see also Table D.2): t38UDPNoEC, t38UDPRedundancy, or t38UDPFEC. If
the answering endpoint supports the offered error correction mode, then it shall return the same
value in the answer, otherwise a different value shall be returned""""



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