BCM 50 1.0 can not call BCM 4.0 or 2.0 H.323 VOIP trunks after upgrade.Also have a 50 2.0 with SIP to the 4.0 that works and the 2.0 and 4.0 can call the 1.0. Nortel level one (India) can't figure it out. Nothing changed except the 400 going from a 3.7 to a 4.0 and adding SIP to the H.323 trunks.Plus the voice quality has degraded. Any ideas.