I have a Cisco 8945 IP Phone with SCCP firmware. I like to convert it to SIP firmware. I don't have Call Manager but TFTP loaded with SIP firmware for the 8945. I tried to reset the phone to boot up and connect to TFTP server but it keeps coming back...

I have a spa525G2 using SIP at a remote location which needs to register to a TFTP server over the Internet.The remote locaiton does not have a TFTP server or option 66 or 150 in DHCP, so I want to either hard code the IP of the TFTP server in the 52...

I have a spa525G2 using SIP at a remote location which needs to register to a TFTP server over the Internet.The remote locaiton does not have a TFTP server or option 66 or 150 in DHCP, so I want to either hard code the IP of the TFTP server in the 52...

We have UC520 connected via SIP trunk to a provider. We have been experiencing bad quality when more than one line is connected to a conferencing system outside. So lets say more than one person call this conferencing system through the SIP trunk fro...

Our SIP providers is saying we should configure our UC520 to communicate with their proxy sip devices for more security between us and them. can anyone give me an ideas of how to configure ALG from UC520 to a SIP proxy. The current setup works fine b...