[Users] uac_replace_from function

I am using uac_replace_from function as below. # replace only display and do not touch uri uac_replace_from("35418474",""); After running uac_replace_from function, I get the following message. U 203.193.4.242:5060 -> 203.193.4.226:5060 SIP/2.0 183 Session Progress. Via: SIP/2.0/UDP 203.193.4.226;branch=z9hG4bKaed7.46cc4101.0,SIP/2.0/UDP 10.0.0.52:5060;rport=5060;received=210.184.4.31;branch=z9hG4bKHNHpldVsKca6IYUS. From: "35418474"<sip:882754853589@ow01.owtel.com>;tag=sBl2gLH6O1myyqL5. To: "92588819" <sip:92588819@ow01.owtel.com>;tag=47C61DF4-26CD. Date: Fri, 06 Jan 2006 10:41:17 GMT. Call-ID: yTCQvS56ZCZXCHgt(a)10.0.0.52. Server: Cisco-SIPGateway/IOS-12.x. In the normal message, sip message, there is a space between display name and uri. ie. From: "35418474" <sip:882754853589@ow01.owtel.com> However, after I apply uac_replace_from function, there is a space there. How can I add a space such that it looks like a normal sip message? Does the space will affect the caller display?