Philips SPENDEX 40 Maintenance Manual page 50

r
NATO CONFIDENTIAL
SPENDEX 40 UA 8251/00 AND /Ol
LIMITED MAINTENANCE MANUAL
6 . 3 . 5 Modem test
In the modem test substate it is possible to test the internal and
the external modem. Which modem will be tested depends on the
Low/High Frequency setting. If the equipment is set on Low Frequency
(LF), the internal modem will be automatically tested. Is it set on
High Frequency (HF), the external modem will be tested.
For a successful course of the internal modem test the 2-wire/4-wire
and the Half/Full Duplex settings are important. Equipment type
UA 8251/01 should be set on 2-wire Full Duplex (2WFD). With equipment
type UA 8251/00 all setting possibilities are allowed, except 2-wire
Full Duplex.
■
-
"
Actions
LED
D i s p l a y
Remarks
S t a r t c o n d i t i o n s :
- Apparatus on hook
"TESTMODE"
Apparatus in
t e s t w a i t s t a t e .
1. Key in test code 4.
2. Press # key.
3. Press P key.
"MOD TEST"
"MOD TEST"
"MODEM OK"
"TESTMODE"
Apparatus in
modem test
substate.
Modem is tested.
Modem OK.
Apparatus back to
test wait state.
Modem test - fault finding table
r
Display
Meaning
Suspected module
"M0DM ccc" Control signals of modem
FIRST CHECK THE
or settings of apparatus
SETTINGS OF THE
i n c o r r e c t EQUIPMENT!!
(ccc - 001...008, 016,
024, 032, 064, or
• Telephony board
128).
• Line interface board
• Modem
"MDERR 01"
External loop faulty
• Telephony board
• Line interface board
• Modem
• Key generator board
"MDERR 02"
I n t e r n a l l o o p f a u l t y
• Telephony board
• Key generator board
• Timing board
I
r
9922 154 13431
NATO CONFIDENTIAL
6-11