
3.5.21
Access Barring by Digit Analysis
1.
Check the programming. Check station allocated to class of service and data needed for barring.
2.
Check that the programmed data agrees with the sales form.
3.5.22
1.
External Paging
2.
3.
4.
Check that the paging signals appear at the SDF. If they do then the fault is in the paging amplifier or
external speaker in which case the repair is customers responsibility.
Check that the system is equipped with the TMB-AN board.
Replace TMB-AN board.
Replace CPB-AN board.
3.5.23
1.
2.
3.
4.
PABX Recall
5.
Check that the system is programmed for the type of recall required by the PABX.
If earth recall is required check that the earth is provided and has been wired up correctly on the SDF.
If switchhook flash is required check that the switchhook flash timer has been programmed correctly.
If 2 and 3 are correct and problem still exists replace the SLB-AN board corresponding to the line on
which PABX recall fails.
Replace CPB-AN.
STATION TESTS
3.5.24
1.
Line Keys
Check the wiring from the main equipment. Check that the station voltages are correct according to
the table in 3.5.1.
2.
3.
Check line cord connection and plug wiring according to the table in 3.5.1.
If the LED doesn’t light, check ribbon cable between keyboard assembly and the main PBA in the
station.
4.
If no dial tone check receiver and transmitter wiring as in 3.5.6.
5.
If no
replace station.
6.
Replace SLB-AN board.
3.5.25
1.
Diaiiing
Check that all digits were
2.
Check transmitter and receiver dialling as in 3.5.6.
3.
Replace station.
3.5.26
1.
2.
LED Operation
If the LED doesn’t light, check the ribbon cable between the keyboard and the main PBA in the station.
Replace station.
3.5.27
1.
2.
3.
intercom
Check whether station has sidetone. If not check receiver and transmitter wiring as in 3.5.6.
Check plug and socket wiring as in 3.5.1.
Replace station.
3.5.28
On-hook Operation
1.
Check that the station is either ON-HOOK or HANDSFREE type.
2.
Check speaker wiring in the station.
3.
Replace station.
3.5.29
1.
2.
Display
Check station wiring at the plug and socket according to table in 3.5.1.
Replace the station.
122
AN-61 6
ISSUE 1