ISDN Adapter Option
980-001-0221C
FrameSaver NP 64+ User’s Manual - Installation Guide
6-17
March 2001
ISDN Tests
ISDN testing features include Network Loopback and Operator-Initiated Management
Session Tests.
Loopback
The ISDN “B” channels may be looped back (toward the Network) for external testing.
Configured for Backup operation
Loopback of a B-Channel is automatically initiated when connection is made to a Dial-
In call, provided the B-Channel is currently configured for Backup operation.
NOTE: In some cases, the Directory # assigned (as entered and displayed on
the ISDN Configuration screen), may not match the actual number to be di-
aled in order to establish a Dial-In connection to the B-Channels. Contact the
Network Control Center or Telephone Service Provider to verify the Dial-In
number if problems are encountered.
The Backup process has priority over loopback, and will automatically clear a B-Chan-
nel loopback and initiate the Backup process if Backup is triggered while a loopback
is established.
Configured for On-Demand operation
The “Call Out/Loop” test feature on the ISDN Status / Test screen initiates a Band-
width On Demand (BOD) call-out and sets a loopback toward the Network at the On-
Demand configured data rate.
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