User`s guide

System Administrator’s Guide – Release 7.2.3.x
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trademarks of their respective owners.
Revised: September 1, 2010
Page 62
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
– This setting determines 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
– This value is the 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.
Source IP Address
– This parameter is used to determine the static IP address for the Allworx server end of a
data connection. Typically, this is the public IP address associated with your ISP connection. If a value of
0.0.0.0 is entered, the service provider is expected to provide the correct value dynamically during session
establishment, if the service provider supports that. Consult your ISP for more information.
Destination IP Address
– This parameter is used to determine the static IP address associated with the
router/gateway at the far end of this Digital Line. A value of 0.0.0.0 can be used to have the service provider
assign the proper value, if the service supports that. Consult your ISP for more information.
Channel Assignments
– On a Digital Line you must specify the desired operating mode for each time slot per
the provisioning defined by the service provider or the device you have connected at the other end of the
Digital Line. If the proper selections are not made, improper operation will result. Currently the following
modes are supported:
Disabled
– Indicates that this time slot is not used on this Digital Line
PRI B Channel
– A bearer channel for ISDN PRI operation that can be used for carrying voice calls.
Specifying this mode, in effect, defines a new outside line for the PBX for each slot configured in this
mode.
PRI D Channel
– A data-signaling channel for ISDN PRI operation, which is used for transporting call
control information between the PBX and the Central Office. The Allworx server always operates as
user equipment on a PRI line. If PRI operation is enabled on this line, exactly one slot must be
configured as the PRI D channel. Typically, this will be slot 24. When using NFAS, the D channel must
be on the T1-A port.
T1 E and M Immediate Start RBS
– A circuit switched Ear and Mouth mode Robbed Bit Signaling trunk that
uses Immediate Start signaling. Specifying this mode defines a new outside line for the PBX for each
slot configured in this mode. This mode is symmetrical and can be used to hook PBXs back to back to
tie PBXs between sites on a leased line.