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ATM-EI (Expansion Interface Circuit Pack)
Issue 1 June 2005 545
Expansion Interface 2-Way Transmission Test (#241)
This test is nondestructive and applies to every ATM-EI, both active and standby. It is run as
part of craft short and long testing, periodic, scheduled, initialization, and error analysis testing.
The test sets up a connection between a Tone-Clock in one cabinet and a Tone Detector in a
separate cabinet and transmits a digital test count between the PNs. The ATM-EIs used to set
up this connection are chosen by maintenance, not call processing. After the connection is
checked for dial-tone, the connection is torn down and re-established in the opposite direction.
For this test, the second ATM-EI can reside in any PN outside the tested ATM-EI’s PN.
Therefore, if the test should fail in either direction, the test is repeated with a different PN, if
available. This aids the fault isolation procedure.
The test results indicate if the test failed in one or both directions. The test aborts if the ATM-EIs
do not exist on both ends (for example, the EIs are not administered correctly). If the test
passes, the TDM and ATM framer interfaces of both ATM-EIs are functioning properly. If the
test fails, a series of tests are run on the board. Figure 25: Expansion Interface 2-Way
Transmit Test #241 PN X and PN Y represent any of 44 possible PNs. on page 545 shows a
schematic of this test.
Figure 25: Expansion Interface 2-Way Transmit Test #241
PN X and PN Y represent any of 44 possible PNs.
Table 174: Expansion Interface 2-Way Transmission Test (#241)
Error
Code
Test
Result
Description / Recommendation
ABRT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 5 times.
1002 ABRT The system could not allocate time slots for the test. The system could be
under heavy traffic conditions or it can have time slots out of service due
to TDM-BUS errors.
1. If the system has no TDM-BUS errors and is not handling heavy
traffic, retry the command at 1-minute intervals up to 3 times.
1 of 8
Tone
clock
Tone
clock
Tone
detector
Tone
detector
PNC modePNC mode
iodf2wayAWF 040699
ATM
switch
TDM bus
(PN X)
TDM bus
(PN Y)
ATM
circuit
pack
ATM
circuit
pack