URL Scheme for Phone Call

user_76391 0
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Much like the "mailto" URL prefix launches the user's default mail program and starts a new email with specified address, is there a similar URL scheme that would initiate a phone call? Perhaps "phone," "call," or "sip"?

Incidentally, I'm targeting a platform that is using Cisco CUPS, so there may be a platform-specific way for me to initiate a call that is particular to Cisco, but I thought I'd ask the more general question first. However if anyone knows specifically how to programmatically initiate a call via CUPS, that would be great too.

tel phone-call url-scheme url
4 Answers

There is such a URI scheme: tel. It has an elaborate syntax, but here is a simple example of its usage:

tel:123-4567

For the full specification, refer to http://www.ietf.org/rfc/rfc3966.txt .

user_1333270

I'm after the same sort of functionality for Microsoft Office Communicator. After a bit of investigation I found that the following URI syntax will initiate a (VoIP) phone call via communicator: 

tel:+number

eg: to get communicator to call my extension:

tel:+7780
geofftnz_201220

sip: (or sips:) is the official URI scheme for SIP, and I think callto: was used by Skype, but is deprecated.

user_1192120
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