Northern Telecom BCS35 Replacement Manual page 127

Table 12–2
Power and alarm communications circuit pack (A16) options – part number: NT6M84AA
(release 07)
(continued)
Device type
(number)
DIP Chan. Int/
Switch No. Ext
4
(S1)
1 Int
Ext
2 Int
Ext
3 Int
Ext
4 Int
Ext
Rotary None used
Switch
Switch None used
Notes:
Note 1: See Figure 12–1.
Note 2: This circuit pack does not support polling on digital data lines; use for an analog network only.
Note 3: Do not set these switches (S–1 and S–2) to the On position; doing so disables the communication path through the
associated channel.
Note 4: S1 and S2 settings are customer–definable based on whether communications are over digital or analog lines. See
the following chart for digital guidelines. Use these guidelines for to determine the site settings for SW1 and SW2.
a. If channel A, J1 (BX.25 Polling for BCS25–35 DPP systems w/o 56K polling)
SW1 positions 1 and 5
all others
Position/setting
SW1–SW2
Setting
SW1–1, 5 Off
SW1–1, 5 On
SW1–2, 6 Off
SW1–2, 6 On
SW1–3, 7 Off
SW1–3, 7 On
SW1–4, 8 Off
SW1–4, 8 On
ON
Off
Function
With SW2, transmit
clock selection,
(internal or external)
With SW1, transmit
clock selection,
(internal or external)
(Internal clock is from
the Quad SIO in slot
A1AxA6.)
is done over a digital line:
End
DPP Card Replacement Guide BCS35 and up
P/A Comm circuit pack 111
Setting
Factory On–site
Off
Off
Off
Off