IBM 5280 Manual page 246

C E F
122
COMMUNICATIONS MAP
AUTO ANSWER
PAGE 4 OF
7
011
- Measure
Relay' .
A-D8B03 'Transfer
Is the signal approximately
-2.7 Vdc?
Y N
012
- Defective
adapter
812).
013
3SLS line
card (A-D7)(MIM
Defective World Trade line
plate.
014
- Check
for 2100 Hz between
A-D7DC5
, , r.
_.a. ....
...,....,'-""1 ...
0
A-D7DOS 'GND'.
T~_'
• 't'"
--....I
a l i U
Is 2100 Hz present during 3.5
seconds?
Y N
015
Defective 3SLS line adapter
card (A-D7)(MIM 812).
016
017
Defective World Trade
plate.
line
Does the answering tone stop after
3.5 seconds?
Y N
5 5
H J
MAP 3016-4
A-DSB03 'Transfer Relay' signal
levels:
On: -2.7 Vdc
Off: -4.5 Vdc
The
38LS
should activate the
'Transfer Relay' when 'Current
Detection l' and 'Current
Detection 2' are activated
(together three times), and when
the machine is in data mode.
Use CE tool 'intercom' or 'dB
meter'
The 3SLS should send a 2100 Hz
tone when answering a call
automatically.
EC840874 PEC839787
MAP 3016-4