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Chapter 1: INTRODUCTION
1.6.4
T-1 Network Access
There are two ports on the front panel that allow access to the T-1
network. The T-1 Network Interface Port is an 8-pin, RJ48C port that
provides access for the digital T-1 line. The Drop/Insert Interface is also
an 8-pin, RJ48C port, and provides connection to a local Private Branch
Exchange (PBX), or other equipment, such as an ETWMIM equipped
with a T-1 interface.
In addition to these ports, there are 8 Status LEDs that provide the user
with valuable information regarding the T-1 network.
DI SYNC
The green DI SYNC LED is ON when the T-1 engine is detecting frame
synchronization on the Drop and Insert Interface. The LED is off when
there is a Loss of Frame (LOF) synchronization.
An LOF condition causes the T-1 engine to transmit all unframed ones
(keep alive signal) to the device attached to the Drop and Insert Interface.
ON LINE LED
The green ON LINE LED is ON when the T-1 engine is connected to the
network interface.
1.6.5
NETWORK STATUS / ALARMS
TEST - Network Test
This red indicator is ON when the T-1 engine network interface is placed
into a test loopback condition. Loopback tests are activated either locally
by the user, or by the telco provider.
SYNC - Synchronized
This green indicator is ON when the T-1 engine is properly synchronized
with the network signal and is receiving proper framing information.
LOS - Loss of Signal
This red indicator is ON when the T-1 engine is detecting no signal
(pulses) on the network interface receiver. When a LOS condition exists
the T-1 engine transmits unframed all ones (Alarm Indication Signal) to
the network.
1-8
CSMIM-T1 Hardware Installation Guide
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