User guide

System Administrator’s Guide – Release 7.5
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Revised: April 9, 2013
Page 107
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]
* These settings are specific to the ITSP. For instructions on configuring them for Allworx
partner ITSPs, download the ITSP Application Notes from
www.allworxportal.com.
VoIP Settings*
Force Remote Phone audio
through server
A NAT traversal aid for remote phones that are calling other
internet devices (ITSPs, other remote phones). This setting
only applies to:
• WAN-to-WAN calls,
• Remote phones that are behind a NAT/Firewall, and
• Remote phones that use RFC 3581 "Symmetric Response
Routing (rport)" for NAT traversal.
Note: your ITSP may require enabling this feature.
When enabled:
• the server will proxy the RTP packets for the end-points in
the call,
• twice the bandwidth is used per call.
When disabled:
• the server is not involved in the RTP of the call,
• no bandwidth is used in the WAN-to-WAN calls, and
• remote phones need to be port-forwarded through any
NAT/Firewalls to use internet VoIP services
RTP DTMF Payload Used in the SIP INVITE messages when calls are placed. The
typical value is 96. Some ITSPs require other values (e.g.
101). An incorrect setting of this parameter will result in
outbound calls not being able to navigate external Auto
Attendants. If SIP trunks from two different ITSPs are on the
same system and the ITSPs require different values, then the
value should be set per the ITSP requirements for the SIP
trunk used most for outbound calls. The other SIP trunk will
experience the Auto Attendant problem. Also, it may not be
possible to transfer calls between the trunks
*In addition to the settings on the SIP Proxy page, there are settings on the VoIP server page
(Servers > VoIP) that must be checked.
Many parameters associated with SIP Gateways are the same as their counterpart under SIP
proxies. The 6x12 servers do not support SIP Gateways.
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
Used when the gateway does not support registration or when
you do not wish to authenticate the gateway. Contacting the