Subject: [Megaco] question about draft-laha-megaco-cas-mntc-00.txt

From: Zhao Bo <[email-masked]>
Date: Tue, 09 Sep 2003 09:40:59 +0800

Dear editors:
    The questions is how to unblock a blocked line via casmntc package signal. My first thinking is send a an empty signal description. But according to draft-manyfolks-megaco-caspackage-02.txt, section 6.6.4: 

       A line signal should always be present on a CAS interface. If the 
       MGC sets a SignalsDescriptor that would result in the removal of a 
       line signal without the specification of a new line signal, such as 
       an empty SignalsDescriptor, the execution of the command fails. The 
       MG SHALL include error code 458 "Illegal action, line signal can not 
       be stopped" in its response.

    To do this is illegal. Maybe MGC shall send a "idle" signal or something? I didn't find an "idle" signal in bcas package. 
    What's your advisement? Thanks and best regard!

Zhao Bo

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