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  1. Burgal77

    Mitel returning SIP 486 when extension busy

    We have a mitel micollab virtual appliance running 6.0 sp2. When a call comes in to a fax ata when the fax is engaged the ata returns sip 486 busy here to the Mitel appliance. Mitel changes this sip message and returns sip 480 temporarily unavailable to the pri sip trunk. The caller hears...

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