Note, DevNet provides support for the Jabber Web SDK, not the capabilities of the Jabber native clients.
However, I think you can accomplish what you describe via 'cross launching': when Jabber is installed, it creates an associated between various 'URI schemes' (e.g. 'ciscotel://xxxx') and itself in Windows, so that links that match the URL scheme will launch Jabber. This works in much the same way that a 'mailto://xxxx' URI works.
Jabber should support the following URL schemes for making a call:
- TEL://
- CISCOTEL://
- SIP://
e.g.;
<a href="CISCOTEL://914055551212">test link</a>
This document is specific for Jabber for iPad, but discusses the various Jabber URI schemes that should exist: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/iPad/9_x/JABP_BK_J3C828CB_00_jabber-for-ipad-admin-9-1-1_chapt…