User guide

System Administrator’s Guide – Release 7.5
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Revised: April 9, 2013
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gateway through this mechanism requires the gateway to have
a static IP address. The system does not enable DNS names
for security reasons.
Prefix String Define DTMF digits prepended to the dialed number string
when placing outbound calls through the gateway (e.g. ‘9’ for
dialing through another SIP PBX).
13.3.3 Enterprise Dialing Feature
The Enterprise Dialing feature enables a third party SIP server to be the central hub for
calls between multiple sites that have Allworx servers. This provides a centralized
phone book and administrative service for the entire VoIP network.
13.3.4 Allworx Enterprise Client
Each Allworx server can be configured as an enterprise client and direct inter-office
calls to the central hub. An SIP Proxy is created for the central hub with the call routing
set to Proxy is an enterprise server. The Enterprise Dialing rule (Phone System > Dial
Plan 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.
13.3.5 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
†
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.