User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
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Enterprise Dialing rule (Phone System / Dial Plan web page) is set to a service group that contains just the
SIP Proxy entry for the central hub server. The number of digits to collect/send is set to cover the entire
enterprise.
The Allworx
dial plan uses an ‘8’ prefix
†
to indicate that the dialed number is to be forwarded to the Enterprise
Server. For example, dialing 81234 will send a SIP INVITE with a URI of <sip:1234@centralHubServer> to
the Enterprise Server.
Central Hub / Enterprise Server
The central hub is a SIP proxy server that accepts incoming INVITEs from the Allworx
servers, determines
the final destination for the request, and forwards the request to the destination Allworx. It maintains an active
list of Enterprise extensions and their mappings to extensions at each site. For example, an enterprise with 4-
digit dialing might have the following information in its databases.
Site Account Name Account Password Current address Site Description
allworx1 ****** 66.64.219.38:5060 New York City office
allworx2 ********* 64.129.42.33:5060 Atlanta office
allworx3 ***** 129.116.21.193:5060 San Diego office
The current address is the IP Address and SIP Protocol port of the Allworx
server. This can be static or
updated through periodic SIP Registration. The Enterprise extensions could be configured as follows (using
3-digit extensions):
Enterprise Extension
†
User User Extension
†
Site
1234 John Doe 108 allworx1
1452 Larry Tate 111 allworx1
4689 Fred Jones 108 allworx2
5999 Jane Smith 177 allworx3
For example, John Doe in New York City dials 84689
†
to reach Fred Jones. The SIP INVITE is sent to the
central hub with a URI of <sip:4689@centralHubAddress>. The Central Hub validates the sender’s
credentials and looks up 4689 in its databases. It composes an INVITE with a URI of
<sip:108@64.129.42.33:5060> and sends it to allworx2. Fred Jones answers the phone and the call is
established.
Shortly after, John Doe dials 81452
†
to reach Larry Tate. The SIP INVITE is sent to the central hub with a
URI of <sip:1452@centralHubAddress>. The Central Hub validates the sender’s credentials and looks up
1452 in its databases. The recipient is on the same server as the sender (allworx1), so the hub responds with
†
Extensions may vary per system. If you are using a non-default Internal Dial Plan, consult the Phone Features tab of the
My Allworx Manager page to determine what extensions are being used for the corresponding feature.