[SIPForum-discussion] Which escaped chars in an escaped Replaces header?

Zuccari, Massimiliano (Massimiliano)** CTR ** mzuccari at lucent.com
Fri Nov 4 15:45:36 UTC 2005

Hi all,

Is there any specific requirement on whether in an escaped Replaces header (e.g. in a Refer-To header) some characters are not allowed and so have to be "escaped"?

As an example, we were trying to send what follows:

Refer-To: sip:partyC at ipc.client1.itl.it?Replaces=987656 at client1.itl.it%3Bto-tag%3D4edft67%3Bfrom-tag%3D9iujy6332

And we are finding that some phones do accept a non-escaped "@", while others reject it unless it's escaped with "%40".

Where could I find detailed specs for this issue?

Thanks in advance

Massimiliano Zuccari
Systems Engineer
Covansys Italia
Via Cesare Giulio Viola 65, Roma
fixed      +39 06 6553493
mobile   +39 335 7483620

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