User guide

System Administrator’s Guide – Release 7.5
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Toll Free 1-866-ALLWORX • 585-421-3850 • www.allworx.com
Revised: April 9, 2013
Page 115
looking for the first available channel for a new incoming call,
you will want to configure the PBX for Descending Mode. If
the service provider starts at the top and hunts toward lower-
numbered slots, select Ascending Mode. This parameter is
not critical but having it properly set dramatically lowers the
probability for a condition called glare where both the PBX
and the Central Office attempt to put the same slot into
service simultaneously for two unrelated calls.
Caller ID Name
Since most PRI lines hook directly into the international SS7
telephone signaling network, it is possible to have parties you
call see any Caller-ID string you desire them to see. For
analog phone lines, your CO determines this string but for
PRI lines, the Allworx server can determine it. Set the caller
ID name field to the value you wish called parties to see
when placing outgoing calls on this Digital Line.
Note: The service provider may override these
settings.
Caller ID Number
The phone number presented to called parties for outgoing
calls. See name setting above for more information.
Prefer Originally Dialed
Number (RDNIS) for display
This causes T1/PRI originally-dialed/redirected phone
number to be displayed on Allworx phones if the original call
was redirected and the original call information is provided by
the CO.
Prefer Originally Dialed
Number (RDNIS) for DID
lookup/call routing
This causes T1/PRI originally-dialed/redirected phone
number to be used in DID routing, if the original call was
redirected and the original call information is provided by the
CO.
PPP Username
This is the login account name to use for this Digital Line
when the line has one or more slots defined on it for data
operation. If authentication is not required, leave this field
blank.
PPP Password
This is the login account password to use for this Digital Line
when the line has one or more slots defined on it for data
operation. If authentication is not required, leave this field
blank.
PPP MTU
Determine the Maximum Transmit Unit Size to use when
sending IP packets to the remote end. The Allworx firewall
will force TCP connections to negotiate a MTU no larger than
this value. Typically the default value is 1500. The normal
Ethernet maximum will suffice however lower values may be
required depending on the service provider. If you are having
problems consult your data service provider for advice. If you
are unsure of a proper value to use and are having data
connectivity problems, a value of 512 will negatively impact
performance, but should always work.
PPP HDLC Fill
Fill value to use on the data line across all slots when the
data connection is idle between HDLC frames. Typically the
default value of all 1’s will suffice, but a flag fill may be
desired in AMI line mode.