> Is their any specific length of To/ From header defined by the standard
No. > In case no specific length is defined, is their any common-practice > for max length? RFC 3261 section 18.1.1 might provide you some guidance for message size minimums to support. The common practice is not cap the individual header sizes unless using really high maximum. From an individual header perspective, the Via, Call-ID, Route, Record-Route, and Contact tend to be larger than implementations originally might think (especially when using comma-separated format); thus vendors attempting to use maximum below 256 bytes for comma-separated segment usually have to increase their caps for interoperability reasons. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
