Voice Gateway Media Card maintenance Page 689 of 910
IP Line Description, Installation and Maintenance
During power-up, the card performs multiple self-tests, including an internal
RAM test, ALU test, address mode test, boot ROM test, timer test, and
external RAM test. If any of these tests fail, the card enters a maintenance
loop, and no further processing is possible. A failure message is printed on
the display to indicate which test failed. For example, if the timer test fails on
the ITG-P 24-port line card, F:05 is displayed.
If the other tests fail (up to and including the EEPROM test), a message is
displayed for three seconds. If more than one test fails, the message displayed
indicates the first failure. If verbose mode has been selected (by the test input
pin on the backplane), the three-second failure message is not displayed.
If the maintenance display on the ITG-P 24-port line card shows a persistent
T:20 indicating an IP Line 4.5 software failure, and if this occurs after the
card was reset during a loadware download procedure, call Nortel technical
support for assistance in attempting to download new software onto the card.
Table 79
ITG-P 24-port line card faceplate maintenance display codes
(Part 1 of 2)
Normal code Fault code Message
T:00 F:00 Initialization
T:01 F:01 Testing Internal RAM
T:02 F:02 Testing ALU
T:03 F:03 Testing address modes
T:04 F:04 Testing Boot ROM
T:05 F:05 Testing timers
T:06 F:06 Testing watchdog
T:07 F:07 Testing external RAM
T:08 F:08 Testing Host DPRAM
T:09 F:09 Testing DS30 DPRAM
T:10 F:10 Testing Security Device