Black Box 5000 series Reference Manual page 50

Enter :
B1, B2, B1-B2
>
If B-channel 2 has not previously been assigned to the odd numbered link on this ISDN module, the even numbered
link may be assigned B-channel 2 or none.
If link 2 is assigned none, it is not available for user data connection.
This option is available only when the Digital Leased Circuit option is enabled.
Enter :
B2, none
>
Considerations:
If B-channel 2 is already claimed by link 1 and you wish to reassign it to link 2, you must first reassign B1 to link 1 (select
"B1"); otherwise, the following error display will appear:
Error: B2 is currently allocated to first link
Menus Reference Manual: Link Set-Up Menu
50