Northern Telecom BCS35 Replacement Manual page 130

114 P/A Comm circuit pack
Table 12–3
Power and alarm communications circuit pack (A16) options – part number: NT6M84BA
(continued)
Device type
(number)
DIP Chan.
Switch No.
4
(S1)
1
2
3
4
DIP Chan.
Switch No.
4
(S2)
5
6
7
8
Rotary
Switch
Switch
Notes:
Note 1: See Figure 12–1.
Note 2: This circuit pack supports polling on digital data lines or on an analog network. For use with digital lines check that:
a. DPP systems is BCS25–35
b. Quad SIO circuit pack at A6 and B6 is part number NT6M60BA
c. Four Channel Comm circuit pack at A17 is release 03, or later
d. Collector supports the digital data line feature.
Note 3: Factory settings shown are for an analog network only.
Note 4: S1 and S2 settings are customer–definable based on whether communications use analog or digital data lines. See
the following chart for the digital application to determine the on–site settings for SW1 and SW2:
a. If channel A, J1 (BX.25 Polling for BCS25–35 DPP systems w/o 56K polling) is done over a digital data line:
SW1 positions 1 and 5
All other Off
Note 5: Make sure the settings for internal and external transmit receive clocks agree with the settings on the QSIO circuit
packs in A6 and B6 before working with digital data lines.
297-1001-536 Standard 01.03 August 1996
Position/setting
Int/ S1–S2
Ext Setting
Int S1–1, 5 Off
Ext S1–1, 5 On
Int S1–2, 6 Off
Ext S1–2, 6 On
Int S1–3, 7 Off
Ext S1–3, 7 On
Int S1–4, 8 Off
Ext S1–4, 8 On
Int/ S1–S2
Ext Setting
Int S2–1, 5 Off
Ext S2–1, 5 On
Int S2–2, 6 Off
Ext S2–2, 6 On
Int S2–3, 7 Off
Ext S2–3, 7 On
Int S2–4, 8 Off
Ext S2–4, 8 On
None used
None used
On
Function
With S2, transmit clock
selection, (internal or
external)
With S1, transmit clock
selection, (internal or
external)
(Internal clock is from
the Quad SIO in slot
A1AxA6.)
(External clock is
derived by looping
around the TCIn
signals.)
End
Setting
Factory On–site
Off
Off
Off
Off
Off
Off
Off
Off