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SW5 (5) - SW8 (8): T1/E1 Line Configuration Settings
These DIP-switches configure the 4xT1/E1 MUX modules for T1/E1 operation and the copper line build-
out. This is a global configuration for all ports on the module.
SW5 (5)
SW6 (6)
SW7 (7)
Down
Down
Down
Down
Down
Down
Down
Down
Up
Down
Down
Up
Down
Up
Down
Down
Down
Down
Down
Up
Down
Down
Up
Up
Down
Up
Up
Up
Down
Down
Up
Down
Down
Up
Down
Up
Up
Down
Up
Figure 9: T1/E1 Line Build-Out
DIP-switch Bank 2
Switch numbers in parenthesis (#), correspond to the numbers stenciled next to the DIP-switches on
the printed circuit board and displayed on the management interface.
Switch
Function
SW1 (9)
Port 1 Alarm/LEDs Disable
SW2 (10)
Port 2 Alarm/LEDs Disable
SW3 (11)
Port 3 Alarm/LEDs Disable
SW4 (12)
Port 4 Alarm/LEDs Disable
SW5 (13)
Circuit Test
SW6 (14)
Local Fiber Loopback
SW7 (15)
Remote Fiber Loopback
SW8 (16)
Line Code
Figure 10: Bank 2 DIP-switches
SW1 (9) - SW4 (12): Port Alarm Relay/LED "Act / Off"
These DIP-switches enable/disable the port alarm relay and LED functions for the corresponding port
on the 4xT1/E1 MUX module. When these DIP-switches are in the "Act" position (default), the alarm
relay and Link "Lnk" and Remote "Rmt" LEDs are enabled. When these DIP-switches are in the "Off"
position, the alarm relay, "Lnk" and "Rmt" LEDs are disabled.
Port Alarm Relay
The port alarm relay will close when any of the following port alarm conditions are detected (i.e. alarm
relay port 1 will activate when an alarm condition is detected on port 1).
•
Power loss
•
The detection of AIS or Loss of Signal (LoS) on any of the four local T1/E1 copper ports
•
The detection of AIS or LoS on any of the four remote T1/E1 copper ports
•
When the T1/E1 MUX is not peered with its remote partner
SW8 (8)
Description
Down
T1 DSX-1: 0' to 133' (default)
Up
T1 DSX-1: 133' to 266'
Down
T1 DSX-1: 266' to 399'
Up
T1 DSX-1: 399' to 533'
Down
T1 DSX-1: 533' to 655'
Down
T1 DS1: 0dB
Up
T1 DS1: -7.5dB
Down
T1 DS1: -15dB
Up
T1 DS1: -22.5dB
Down
E1 75 W Coax/BNC Standard
Up
E1 120 W RJ-45/48 Standard
Down
E1 75 W Coax/BNC Extended/LH
Up
E1 120 W RJ-45/48 Extended/LH
Down (default)
Up
Act (Normal)
Off
Act (Normal)
Off
Act (Normal)
Off
Act (Normal)
Off
Off (Normal)
On
Off (Normal)
Loc
Off (Normal)
Rmt
B8ZS Line Code
AMI line Code
Page 5
NOTE: The alarm relay uses pins 7 & 8 of port 1 on each 4xT1/E1 MUX module. If more than one
4xT1/E1 MUX module is installed, each alarm relay operates independently from the other modules.
The optional breakout cable provides access to the T1/E1 and alarm relay pins: part number 9142-1.
SW5 (13): Circuit Test (C/T) Mode "Off / On"
When this DIP-switch is in the "Off" position (default), the Circuit Test Mode is disabled. When this
DIP-switch is in the "On" position, the Circuit Test Mode is enabled. Circuit Test Mode only needs to be
enabled on one end for the test to initiate.
When Circuit Test mode is enabled, both 4xT1/E1 MUX modules will transmit a known test pattern. The
test pattern is received by the far end unit and checked for errors. AIS is transmitted out all T1/E1 ports
and incoming T1/E1 traffic is discarded. A slow green/yellow alternating "Sys" LED on the initiating end
and a fast green/yellow alternating "Sys" LED on the far end indicates a successful test.
Figure 11: Circuit Test Mode
SW6 (14): Local Fiber Loopback "Off / Loc"
When this DIP-switch is in the "Off" position (default), local fiber loopback is disabled. When this DIP-
switch is in the "Loc" position, local fiber loopback is enabled on the MUX module. AIS is transmitted
across the fiber and out all remote T1/E1 ports. Incoming T1/E1 traffic at the remote unit is discarded.
Figure 12: Local Fiber Loopback
NOTE: Only one loopback activation (Local Fiber Loopback or Remote Fiber Loopback) can be
configured at the same time.
SW7 (15): Remote Fiber Loopback "Off / Rmt"
When this DIP-switch is in the "Off" position (default), remote fiber loopback is disabled. When this
DIP-switch is in the "Rmt" position, remote fiber loopback is enabled on the 4xT1/E1 MUX module. In
this mode, the local unit forces the remote 4xT1/E1 MUX module into loopback. AIS is transmitted out
all remote T1/E1 ports. Incoming T1/E1 traffic at the remote unit is discarded.
Figure 13: Remote Fiber Loopback
Page 6
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