I have a Nortel CS1000 version 7.5 with SIP trunks connected to a Virtual Mitel 3300 version 12.0.3.15, the Mitel has SIP trunks to a LD provider. Occasionally when making a call from a Nortel IP phone that goes to the Mitel via the SIP trunks and out the LD providers SIP trunks the Nortel...
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