Specifications

Chapter 1 Installation
1-9
Hardware Configuration Setting
All configurations are set using easily accessible switches. While most switches are external to the box,
the individual channel gain switches are located on each channel card.
T1 Control Switches: 10 Position DIP Switch Block On Front
Panel
Factory Default setting is all switches off, which is the most popular application. Details are listed below
the table. The OFF position is away from the switch label on the case, which is toward the wall in a
wall mounted unit.
Switches 1&2-
Line Build Out
Switch 1 Switch 2
0 dB Line Build Out Off Off
-7.5 dB Line Build Out On Off
-15.0 dB Line Build Out Off On
Invalid Selection On On
Switches 3-10 OFF Position ON Position
3 Clock Source
Loop (Normal) Master
4 Framing
D4 (SF) ESF
5 Line Coding
AMI
B8ZS
6 CSU Loop Code Detection
Enabled (Normal) Disabled
7 Test Tone
Normal 1 kHz Digital Milliwatt Tone
received by all 24 channels -
Disconnect Telephones!!
8 Option 8
Always Off
9 Option 9
Always Off
10 Option 10
Always Off
Line Build Out Switches # 1 & 2
The T1 Line Build Out (LBO) can be programmed to either 0 dB, -7.5 dB, or -15 dB. These options are
in keeping with the requirements of FCC Part 68 and Industry Canada CS-03. This option determines the
T1 signal level that is transmitted from the Access BankTM to the carrier interface. 0 dB is the highest
signal level, -15 dB is the lowest signal level. Most connections to public carrier T1 lines now are at 0
dB, and this is the Access BankTM default level. Contact your carrier to determine if a lower LBO value