IBM 5280 Manual page 232

A B COMMUNICATIONS MAP
I I
NON AUTO ANSl-JER
PAGE
2
OF
5
004
The data/talk
switch is not
wired,
correctly in the
telephone.
005
- Place the telephone on hook.
- Have a call placed from another
telephone.
Does th.e telephone ri ng?
Y N
006
007
Telephone problem.
Have the customer place a call
to the telephone company.
- Take the telephone off hook.
Can you talk with the person on
the other telephone?
Y N
008
C
Telephone problem.
Have ~he customer place a call
to the telephone company.
C
f'1AP 3013-2
009
Place the telephone(s) on hook.
Go back to the MDI prompt,
an
5
w e r '
Y' ,
an d fo
11
ow the
prompts.
(ENTRY POINT B)
THIS IS THE TRANSMIT LEVEL CHECK
FOR A SWITCHED NETWORK WITH A CDT
TYPE COUPLER.
The communications MDIs should
be loaded and set up to transmit
a constant data
p~ttern
of hex
FFFF.
Again, place a call to the modem
telephone from another
telephone.
Carefully place the talk/data
mode switch into its alternate
position. This puts the modem
telephone into data mode.
Do not place the modem telephone
on hook.
Connect th~ dB meter between
'Data Tip' and 'Data Ring' at
the coupler.
Does the dB meter indicate the
value expected (should be marked
on the coupler) within a tolerance
of one dB?
Y N
5 3
D E
EC840874 PEC839787
MAP 3013-2