This test requires either an X.21 interface loop or an X.21 analyzer. A loop connector
can be made very easily; it requires a 15 male sub-D connector with the connections
given by the following table (refer to chapter 4, section “X.21 interfaces (X4X.21
card)” (p. 4-45)). If an X.21 analyzer is available then perform the test as a TM
configuration (refer to note 4).
From to Pins
Transmit - Receive - 1 to 2
Control - Control - 3 to 5
Transmit + Receive + 9 to 11
Control + Control + 10 to 12
Remark: No timing connections are required because the clock is supplied by the
option card itself.
Note 4:
For TM configurations (S11, S41, L11, and L41), an X.21 analyzer is required with
two applicable test leads (refer to the remarks of the X.21 option test card).
Stand-alone test procedures
Test equipment and accessories
...................................................................................................................................................................................................................................
365-312-802R7.2
Issue 4, June 2007
Alcatel-Lucent - Proprietary
See notice on first page
7-5
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