Specifications

Excalibur Multirate DAP Installation and Operation
6-32
Analog Dial Line Tests
The Excalibur Multirate DAP provides five diagnostic tests that check the performance of
the dial backup line when the Dial Mode parameter is set to BIS+ in the Dial
Configuration submenu. Three of the tests (Dial Tone Test, End-to-End Call Test, and
Self-Error Test) can be initiated only during digital line operation. They do not interrupt
the DAP's data transmission during or after the test. The End-to-End Error Test and the
Loop 2 Error Test can be initiated only during dial backup operation. When the Dial
Mode parameter is set to 32BIS in the Dial Configuration submenu, two tests are
available: Dial Tone Test and Self-Error Test.
• Dial Tone Test - takes the dial line off-hook and checks for a dial tone.
• End-to-End Call Test - establishes a dial line connection between the local and
remote DAPs. The local DAP then sends a message to verify the end-to-end
connection.
• Self-Error Test - loops the dial interface back towards the unit and a pseudo-
random 2047 or 511 test pattern is transmitted, received, and checked for errors.
The error count can be monitored and errors can be inserted.
• End-to-End Error Test - local and remote units stop passing main channel data
and transmit and receive a pseudo-random 2047 or 511 test pattern. The error
count from each unit can be monitored and errors can be inserted at each unit.
• Loop 2 Error Test - places the far-end unit into a Digital Loop or a V.54 Digital
Loop depending on the Remote Digital Loop parameter setting in the DAP
Configuration submenu. The local unit generates a 2047 or 511 test pattern
through the looped path. The error count can be monitored and errors can be
inserted at the local unit.
Notes: To select the test pattern for the Self-Error Test, End-to-End Error Test, or Loop
2 Error Test, enter the DAP Configuration submenu and press the button beneath Pttrn.
Then press the button beneath the desired test pattern.
If the Diagnostic Compatibility parameter in the RCP submenu is set to On, the DAP will
generate the 511 test pattern for the End-to-End Error Test and the Loop 2 Error Test
during dial backup operation regardless of the pattern selected in the DAP Configuration
submenu.