Dear All,
I fixed the issue. let me explain; The 3Com switches are a bit difference with other switches, especially in VoIP part. We should give the manufacturer OUI address to provide the traffic in between phones and VoIP server. in this case we have to Add Avaya's OUI number. The OUI number is the first 6 digit of MAC Address. For example, if the MAC address is 001b4f51b3cb is the mac address, the OUI number is 001b4f. Then we have to change this OUI number to showing format like 001b.4f00.0000. Then there is MAC Mask for MAC address filtering. The common MAC Mask is ffff-ff00-0000. The these to Values must add to the 3Com switch's Voice VLAN. The command is:
[highlight #F57900]System-view[/highlight]
voice vlan mac-address [OUI Number] mask ffff-ff00-0000 description Avaya Phones.
Here this command will be
voice vlan mac-address 001b.4f00.0000 mask ffff-ff00-0000 description Avaya Phones. Then all other configurations will be over ride and the switch will allow the traffic to the Phones.