User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
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• Remote Frames – Incoming data is synchronized and decoded at the frame level. These decoded
frames are then reframed locally and sent back out on the transmitted output line.
• Remote Unframed
– Incoming data is decoded at the bit level from analog voltages to digital bits and
directly sent out as a stream of bits back towards the source on the transmitted output line. No attempt
is made to synchronize or verify the data at the frame level.
• Local Unframed
– An internal analog loop back is performed on the local interface so that transmit data
is immediately looped back to the receive path. This mode is useful for verifying that the physical
interface is operating correctly on the Allworx unit. Although not strictly required, it is recommended that
B8ZS, ESF, and Clock Source Internal be used for such tests.
Line Build Out
– These settings determine the pulse shape and transmit power levels used on the analog
output of the Digital Line interface. The dB settings are for long haul configurations, while the distance
settings are used for short haul configurations. Generally speaking the short haul settings should always be
used since Allworx equipment is intended for use with a local smart jack only and not for driving the physical
T1 lines on the telephone poles directly. You must pick the length setting that matches the cabled distance
between the Allworx server and the service provider’s demarcation point. If this setting is improperly
configured line errors may be very common or problematic and affect system reliability.
PRI Switch Type
– Select the Primary ISDN (PRI) switch type that is used by the service provider. Select
NONE if this interface is not connected to a PRI based service.
Note: If this parameter is improperly configured your telephone service will most likely work, however there
will be subtle problems when certain type of conditions occur such as calling cell phones, busy
numbers, or during network congestion. Additionally, Caller ID functionality may be affected as well.
Take care to find out the correct setting from the service provider and set this parameter accordingly.
Voice Channel Selection Order
– This parameter determines the order the Allworx PBX will attempt to seize a
line for outgoing calls within each service group assigned to this Digital Line. You want to set this selection to
be the opposite direction that the service provider uses for incoming calls. For example, if the service provider
hunts incoming calls starting from slot 1 towards higher numbered slots 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
– This number is 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.