Chapter 5: Testing Equipment and Installations
Note:
Default options are assumed. If you have trouble with any of the
following procedures, a previous user’s programming may be the cause.
Refer to Programming.
Testing Key Systems or PBX Lines
To test key system and PBX lines, connect TLS-4A lines to Tip and Ring of PBX
or key system Central Office loop start trunks (E&M, DID, or ground start
trunks cannot be tested with the TLS-4A.) If a ground reference is required,
connect a 0.080-inch diameter pin tip probe to the chassis ground reference
jack on the unit back panel (Figure 1). Figure 4 shows the pin connections for
the alligator clip cables used to connect TLS-4A lines to a terminal block
(cables not supplied). Figure 5 gives a generalized diagram for key system test
connections.
Caution:
When ringing is applied, the Ring lead of the modular jacks carries
up to 95 VAC referenced to ground (alternating polarity). Be sure the
TLS-4A power switch is off before handling any cord ends or alligator clip
cables.
Manual Continuous Ring Test
· Connect a telephone to Line 1 of the TLS-4A.
· With Line 1 on-hook, press and hold the front panel switch in the
MAN/RING position.
·
Verify that the telephone rings continuously while the button is depressed
and that the Line 1 indicator blinks.
Line Wiring/Basic Function Test
The following test is used with Tone or Rotary phones.
·
Connect at least two telephones (or other telecom devices) to the TLS-4A.
·
Go off-hook with one telephone and dial the first telephone number for the
other telephone. Default numbers are 101, 102, 103, and 104 for Lines 1
through 4, respectively. Up to 16 digits can be programmed for each line,
as described in Programming.
·
Verify that a standard ring (2 seconds on, 4 seconds off) occurs at the other
telephone.
·
Go off-hook at the other telephone and verify that a connection is
established.
Reference Manual Chapter 5: Testing Equipment and Installations
40-400-00033, Rev. C
Page 17
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