(Answer) (Category) SIP FAQ : (Category) Relationship to Other Protocols :
How do I interconnect Q.931 (ISDN signaling) and SIP?
A gateway that initiates an ISDN call based on a SIP call or vice versa is reasonably straightforward, as sketched here: (Download) isdn_sip.pdf (8.7 K)

Some additional information and links to related Internet Drafts can be found at http://www.softarmor.com/sipwg/teams/sipt/index.html.

[Append to This Answer]
islepchin@dynamicsoft.com
2000-Jul-04 11:09pm
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