DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1262PKT-INT (Packet Interface Circuit Pack)
9
Private Looparound Tests (#885)
This test requests the Packet Interface circ uit pack to execute its th ree private
looparound tests: Level 2 loopa round, Broadcast path loo paround, and Level 3
looparound. These tests verify the health of the c ircuit pack’s Packet Bus
interface, as well as the translation RA M, inward and outward bound data paths,
parity indications and CRC calculations, and the Level 3 p rocessing firmware.
■Level 2 (LAPD) Link Looparound
LAPD is a link level protocol that is used for all system links. This test
verifies the health of the processing of these links.
■Broadcast Link Looparound
Each ISDN BRI port has two associated broadc ast signaling links, one for
call control and one for maintenan ce and management. Since these li nks
have separate routing circ uitry from the Level 2 Looparound, this test
forces a CRC error to verify the CRC hardware associated with the
broadcast data p ath.
■Level 3 Link Looparound
Level 3 Links support the X.25 Data Phase protoc ol used with the Packet
Gateway to support X.25 links such as those used for AUDIX. This test
verifies the health of the Level 3 firmware. Since soft errors are possib le,
the Packet Interface circuit p ack retries the test before reporting an error.
These tests are also run as part of the reset tests. If the Level 2 or Level 3
looparound test fail as bac kground tests, a "fatal error" message will be sent to
the Packet Interface maintenance software and the Packet Interface circuit p ack
will be put in the "out-of-service" state. Therefore, it is expected that the repair
procedures associated with Abort Code 1137 (out-of-servic e) would normally be
followed when failures with the Level 2 and Level 3 tests occur.
PASS The circuit pack’s firmware is in a proper state. If problems are still reported on
the circuit pack, check for errors on the Private Looparound test (#885) and
Maintenance Looparound Test (#886).
Table 9-498. TEST #884 Memory Checksum Test — Continued
Error
Code Test
Result Description/ Recommendation
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