Black Box 5000 series Reference Manual page 47

Considerations:
The state of the Logical ISDN type option is saved when performing a software upgrade. This means that
when the P1700 restarts, it will return to the operation state that was enabled before the upgrade was
performed.
4 - ISDN Set-Up
The ISDN Set-Up option takes you to the ISDN Set-up menu where ISDN switch types and other ISDN parameters
may be set.
Note: this option appears only if the router has an ISDN BRI module installed on this link and Logical ISDN Type is
set to ISDN.
5 - Group
The identifying number of the Group to which this link is to belong is set here.
Default: [1]
Choices: 1 or 2 if a single interface module is present
1 to 4 if two ISDN interfaces present
Consideration for units with two ISDN interface modules:
If this configuration is setup with remote site callback eanbled, (this router will place a return call when it receives a
prompting call from a remote site) then a callback group should be set up. A callback group is a grouping of one (the
primary ISDN call number) or two (primary and alternate) ISDN numbers that a remote site router may dial to trigger
the callback from this router. If a callback group is not set up, the callback would come from the first available ISDN
link; this may not be the primary or alternate number used by the remote site router, causing the callback to be rejected
by the remote site.
Note: Groups may also be set under the Group Set-up Menu. Links set in that menu need not be set here.
Note: this option appears only if the router has at least one ISDN dual BRI module installed on this link and Logical
ISDN type is set to ISDN.
Menus Reference Manual: Link Set-Up Menu
47