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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-359DATA-CHL (Network Control Data Channel)
10
Data Channel Remote Maintenance Loop Around
Test (#109)
This test verifies the integrity of the entire DATA-CHL (that is, the software, dual
port RAM, and hardware that compose it). It verifies that a connection can be
established over the DATA-CHL and that the DATA-CHL can correctly send and
receive data over the connection (that is, over the TDM Bus). The test actually
involves two DATA-CHLs: the DATA-CHL that is the target of the test and a
second, arbitrary, unbusy DATA-CHL. A connection is set up by placing a call
out from the arbitrary DATA-CHL and into the target DATA-CHL. Data is looped
over the connection in each direction (that is, the target DATA-CHL is tested as
both a sender of data and a receiver of data). The test checks that the data
received by one DATA-CHL is the same as the data that was sent by the other
DATA-CHL.
Because it establishes a connection between two Network Control Data
Channels (DATA-CHLs) across the TDM Bus, this test does more than just verify
the integrity of the target DATA-CHL. It also verifies the integrity of the
DATA-CON (by establishing the connection) and of the TDM Bus and
Tone-Clock circuit pack (by sending and receiving data).
If this test aborts or fails, it is impossible to determine from this test alone whether
the defective DATA-CHL is the target DATA-CHL or the arbitrarily chosen
DATA-CHL, or if the problem lies with the DATA-CON, TDM Bus, or Tone-Clock
Table 10-116. TEST #108 Data Channel Dual Port RAM Test
Error
Code
Test
Result Description/Recommendation
1000 ABORT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals a maximum of 5 times.
2020 ABORT Refer to “STBY-SPE” for a description of these error codes.
FAIL The DATA-CON dual port RAM is not functioning correctly. Either the
software cannot correctly read from it and/or write to it or the hardware
cannot correctly read from it and/or write to it. Connections cannot be
established over the DATA-CHLs.
1. Execute the command again.
2. If the problem persists, replace the TN777 Network Control circuit
pack. After the Network Control circuit pack has been replaced, its
Time-of-Day clock must be set using the set time command.
PASS The DATA-CON dual port RAM is functioning. Connections can be
established over the DATA-CHLs.
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