User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
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checkbox is not checked, the Allworx will act as a proxy between the two remote ends of the calls. Typically
this checkbox is checked.
Supports SIP Redirect
– This selects the method of redirecting inbound calls that are forwarded back to the
service provider without being answered (e.g. all calls are forwarded to a cell phone). If this checkbox is
checked, a SIP 300 redirect message is sent. If this checkbox is not checked, the Allworx will negotiate the
call setup for the service provider. Typically this checkbox is not checked.
Use E.164 format for phone numbers
- Enabling this feature causes rewriting of phone numbers into the
international E.164 format (e.g. 800-555-1212 becomes [phone]). Typically this is unchecked unless
required by the ITSP.
Offer ‘100rel’ support
- Used to indicate the Allworx supports 'reliability of provisional responses (RFC 3262)'.
Typically this checkbox is enabled.
Obtain DID/DNIS number from [source]
– For inbound calls, this describes where the server should get DID
and DNIS information from. Typically this is set to [SIP To: header field].
Use [source] in Request URI of outbound calls
– This defines the username parameter of the SIP Request
Uniform Resource Identifier (URI) for outbound calls to the service provider. Most service providers expect to
have the requested number or ID [dialed number] in this field, but some require the registered account
information [address of record]. Typically this is set to [dialed number].
Details about SIP Gateways
Many parameters associated with SIP Gateways are the same as their counterpart under SIP proxies. In
particular, all the Advanced Settings are identical. See Section 10.4.2, Details about SIP Proxies, for more
information about the common fields. Parameter information specific to SIP Gateways is detailed here.
Gateway uses SIP Registration
– If the gateway supports registration, choose this option. Assign an arbitrary
Login ID and Password for the gateway to use to register with Allworx. This is the desired configuration to
use especially if the gateway uses DHCP to obtain its IP address so that the Allworx always knows how to
contact the gateway for outbound calls.
Gateway uses Static IP Address
– This parameter selection is used when the gateway does not support
registration or when you do not wish to authenticate the gateway. Contacting the gateway through this
mechanism requires the gateway to have a static IP address. DNS names are not allowed for security
reasons.
Prefix String
– This parameter defines DTMF digits to be prepended to the dialed number string when placing
outbound calls through the gateway (e.g. ‘9’ for dialing through another SIP PBX).
10.4.3 Enterprise Dialing Feature
The Enterprise Dialing feature allows 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.
Allworx Enterprise Client
Each Allworx
server can be configured as an enterprise client and direct inter-office calls to the central hub. A
SIP Proxy is created for the central hub with the call routing set to Proxy is an enterprise server. The