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When using Abacus to test SIP, why it cannot correctly deliver the 200OK message with "DATE" header and how to overcome it?


The date header format may not correct. According to RFC3261, the date hearder should be:

20.17 Date

The Date header field contains the date and ime. Unlike HTTP/1.1, SIP only supports the most recent RFC 1123[20] formate for dates. As in [H3.3], SIP restricts the time zone in SIP-date to "GMT", while RFC 1123 alows any time zone. An RFC 1123 dte is case-sensitive.

The Date header field reflects the time when the request or response is first sent.

The Date header field can be used by simple end systems without a battery-backed clock to acquire a notion of current time. However, in its GMT form, it requires cients to know their offset from GMT.

Example: Date: Sat, 13 Nov 2010 23:29:00 GMT

If the Date header is not correct, there are two ways to overcome this:

1. Correct the DUT's Date header format

2. Since the header is not really used by Aacus SIP end point, you may use a filter to filter it out in Protocol development/Incoming filters.



Product : Abacus,6.20,6.11 and below,SIP