UC520 can support multiple SIP Trunks. Using Credential CLI you can configure multiple username/password for registration with the realm being the distinguishing factor.
On the IOS you can create several dial-peers specifying different SIP Registrar/Proxy servers under different VoIP dial-peers.
Under sip-ua mode you will need to enter the credentials commands for the different providers if you have to be authenticated. When you will be challenged by the SP, you will answer with a REGISTER message using the corresponding credentials depending on the SP domain name.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...