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Testing and maintenance
Purpose
This document includes procedures to test the operation of M2000
Digital telephones.
M2000 Digital Telephone testing
M2000 Digital Telephone testing consists basically of acceptance test
procedures. Impulse noise, background noise, and crosstalk
compatibility problems are unlikely. Examine loop length, connect the
telephone, and check performance by establishing a communication
path to another telephone (or data terminal) and going through the
different call routines (enabled features) while observing and verifying
the responses at the telephone and data terminal. Check polarity of tip
and ring leads for reversals before going into more detailed follow-up
tests. The M2000 Digital Telephones are polarity sensitive, and a dead
loop or absence of dial tone may indicate reversed tip and ring
polarities.
Key/LCD indicator tests
Some station access tests originate at the M2000 Digital Telephone by
dialing a 2- or 3-digit access code, usually prefixed by a pound sign (#),
and the last five digits of the Directory Number (DN). The access code
is typically 797, but is defined by the customer. The number of DN digits
depends on the numbering plan used for extension dialing. This access
code sets the M2000 Digital Telephone to the maintenance state.
Perform the steps in Procedure 1. All responses must be as shown in
the ''Response" column for the digital telephone to pass the test. Each
key need only be operated momentarily. The telephone passes the test
if all required responses are met. Replace any telephone not meeting
all test requirements.
If the last five digits of the DN are not correct for the telephone, reorder
tone is received. The tester must press the Rls (Release) key to stop
Meridian SL-100 M2000 Digital Telephone Reference Manual
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