Pub. 42004-693L2C
Model 69320-101 Voice Network Adapter
Page: 4 of 15
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-693l2c.doc
04/06
Switch and Jumper Settings
Overview
Several switch and jumper settings are required for proper operation of the VNA Card. The following
settings are set during the system commissioning and programming and should not be changed. If replacing
an existing 69266-001 T1 card or VNA card for maintenance purposes, be sure to replicate the switch and
jumper setting of the card being replaced. Refer to Figure 1 for the switch and jumper locations.
Front Panel DIP Switch (SW5) Settings
N
OTE
:
The front panel DIP switches (SW5) can be updated without powering down the card rack and
without resetting the MCU.
Position Number Name
Top
1
Line Build 0 (LB0)
2
Line Build 1 (LB1)
3
Line Build 2 (LB2)
4
Receive Equalizer Gain Limit
5 Lamp
Test
6
Customer Disconnect Enable
7
Local Loop Back
Bottom
8
Remote Loop Back
The Line Build # switches control the “line build” (signal’s amplitude) of the T1 transmit line. Set the Line
Build # switches according to the following table:
LB0 LB1 LB2 T1
Line
Length
Open
Open
Open
DSX-1 (0 to 133 feet) / 0 dB CSU
Open
Open
Closed
DSX-1 (133 to 266 feet)
Open
Closed
Open
DSX-1 (266 to 399 feet)
Open
Closed
Closed
DSX-1 (399 to 533 feet)
Closed
Open
Open
DSX-1 (533 to 655+ feet)
Closed Open Closed -7.5
dB
CSU
Closed
Closed
Open
-15 dB CSU
Closed Closed Closed -22.5
dB
CSU
