Hi List, We have some issue when we are restricting caller id to a particular sip carrier using a Cisco 5350XM. The cisco 5350XM sends the from header as From: "anonymous" <sip:0xxxxxx0@xx.yy.zz.99 &lt;sip%3A0282073300(a)202.85.241.99&gt;&gt;;tag=1F480924-17D9 but the sip provider's SBC is case sensitive and requires From: "Anonymous" <sip:0282073300@xx.yy.zz.99<sip%3A0282073300@202.85.241.99> I can't find a config on Cisco to change anonymous to Anonymous. Does anyone knows how to change this on the AS5350XM. Thank you. Regards, Mark Anthony C. Delfin