AT&T MERLIN 1030 Installation Manual page 40

Most times crosstalk on the larger Merlin systems is the result of
a defective line module, voice terminal module, or a basic
telephone module.
The following is a step-by-step outline on the trouble shooting
procedures to determine which module(s) are defective.
1) Determine how many links your system has
a) Multiply the number of line modules by 18
b) Multiply the number of voice terminal modules by 6
c) Multiply the number of basic telephone modules by 6
d) Add all your answers, a, b, and c together, this
equals total number of links
(e.i.)
*Note:
If total is less than 48, always assume there are at least
48 links.
2) Cycle Power (Turn power off, then on at control unit)
*Note: If system has an upper expansion unit (3070), and
there is not a voice terminal module in the upper carrier in slots
21, 22, or 23, at this time insert a voice terminal module into
slot 21. It is o.k. to swap a voice terminal module out of the
lower cabinet for the purpose of this test.
3) Using any model Merlin voice terminal (5, 10, or 34 btn.
voice terminal)
a) (1030) Plug voice terminal into any port in your
1st voice terminal module (slot 9)
(3070) plug voice terminal into any port in any
voice terminal module (slot 21, 22, 23)
b) Depress intercom voice, then depress speaker, and
adjust the volume lever to the center postion.
c) Quickly alternate between intercom voice and
intercom ring buttons 24 times.
d)
Depress recall twice.
NETWORK LINK TEST
Crosstalk On Merlin 1030/3070
(3) Line modules
(4) Voice terminal modules
Basic telephone module
(1)
Total Number of Links
Attachment 1
3 x 18 = 54
4
x 6 =
24
1 x 6 =
6
84
=