Northern Telecom DMS-100 Series Installation And Maintenance Manual page 108

0 297-2121-226
0 VINTAGE 05.01
0
0
0
0 SYMPTOM
0
0
0
0
0 (Desktop) When
0 the DN key is
0 pressed, the DN
0 LED turns on,
0 and a reorder
0 tone is heard.
0
0
0
0
0
0
0
0 DU does not
0 transmit data.
0 Connect LED
0 lit.
0
0 Speed call and
0 auto dial num-
0 bers can not be
0 programmed.
0
0 DU does not
0 answer incoming
0 calls.
0
0
0
0
0
0
0
0
0
0
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0 6-4
TABLE 6.1 (Continued)
DATA UNIT TROUBLESHOOTING
PROBLEM
DTR is not pro-
vided to
DU.
The RTS signal
must be on
is the DU to tran-
smit data.
These features
may not
available
subscriber.
DTR is
asserted.
Incorrect
option switch
setting.
DTE not turned
on.
Table Continued
ACTION
Check that
properly connected.
Turn DTE on.
the
Check RS-232/V.35
nection.
Set assert DTR option
assert DTR.
the Options (NT4X25AA /AE
/AN /AP /AX /AZ) on
4-6 and
Options (NT4X25AF /AG /AH
/AK) on page 4-7.
Enable Assert
for Chapter 3 on page 3-1 and
Chapter 4 on page 4-1).
Contact
be ny.
to
not Set assert DTR option
assert DTR.
DUs see
Options (NT4X25AA /AE /AN
/AP /AX /AZ) on page
and Setting
(NT4X25AF /AG /AH /AK) on
page 4-7).
mount DUs see Setting the
Options on page 4-13).
Set the
option switch to the auto
answer position.
desktop DUs
the Options (NT4X25AA /AE
/AN /AP /AX /AZ) on
4-6 and
Options (NT4X25AF /AG /AH
/AK) on page 4-7).
data line is
con-
to
See Setting
page
Setting the
RTS (see
operating compa-
to
(For desktop
Setting the
4-6
the Options
(For rack-
auto answer
(For
see Setting
page
Setting the
(For