I have a Catalyst 4948 switch running 12.2(54)SG and having an issue with one device receiving a DHCP address.The Device is the new phone system, an Avaya IP Office 500 V2 R11.Currently there is a Windows Server running DHCP issuing addresses and eve...

Hi all, I am experiencing an odd problem with my voice gateway behind a my NAT firewall. I have a cisco 2811 as a NAT/Firewall and behind the NAT/Firewall is another cisco 2811 acting as a voice gateway. The NAT/firewall is Cisco IOS Software, 2800 S...

Hi All, I am having an issue where I have just installed a 1941 router to act as the NAT and Firewall and now the net2phone polycom VVX400 phones will not register. The phones were working fine on the cable modem/firewall and now moving over to the n...

Good Afternoon, I have an issue and I'm not sure that there is a solution but I figured I would ask the forum. I have an ISDN to IP gateway (cisco 3945 Version 15.1 with UC license) which allows my older PBX (ISDN-PBX), which can only handle a T1, to...