CHAPTER 3 NDA-24296
Page 246
Revision 1.0
PA-8COTBJ
Central Office Trunk
5. Switch Settings
Standard settings of switches on this circuit card are shown in the table below.
SWITCH
SWITCH
NO.
SETTING
STANDARD
SETTING
MEANING
SW00
(MB)
UP Circuit card make busy
DOWN
×
Circuit card make busy cancel
SW01
(MB0-7)
ON
Request for make-busy of the trunk circuit corre-
sponding to MB switch.
OFF
×
Request for cancelling the make-busy of the trunk cir-
cuit corresponding to MB switch.
SW02 1-4
Terminal Impedance and B.N.W.setting
SW03
1OFF
×
Fixed to OFF (Not Used)
2OFF
×
Fixed to OFF (Not Used)
3OFF
×
Fixed to OFF (Not Used)
4OFF
×
Fixed to OFF (Not Used)
SW04
1ON
×
Fixed to ON
2OFF
×
Fixed to OFF
3OFF
×
Fixed to OFF
4
ON
Paging Trunk is available (When this switch is set to
ON, CH0 and CH1 cannot be used as CO trunks.)
OFF Paging Trunk is not available.
SW05
1OFF
×
Fixed to OFF
2ON
×
Fixed to ON
3OFF
×
Fixed to OFF
4OFF
×
Fixed to OFF
SW0 (SW10) MEANINGS
1234 B.N.W.
Terminal
Impedance
OFF OFF OFF OFF
EIA/TIA 464-A
600 Ω+2.16 µ
OFF ON ON OFF CCITT Q.517
900 Ω+2.16 µ
ON ON ON OFF 900 Ω
Other Combinations Inhibited