Normal Operation; Local Loopback Operation; Figure 34. The Modem In Normal Operation; Figure 35. The Modem In Local Loopback Operation - Canoga Perkins EdgeAccess Universal Chassis System 2361 T1 User Manual

The EdgeAccess Universal Chassis System

5.4.1 Normal Operation

In normal transparent operation, the data from the user equipment enters the modem at its
transmit interface, passes through the proprietary fiber optic network (See Figure 35), outputs at
the receive interface on the remote end, and vice versa.
LIU Logic
Rx
Tx

5.4.2 Local Loopback Operation

When activated, the Local Loopback test will cause all data transmission from the local user
device to be looped back toward the receive side of that same device. The local modem under
local loopback will transmit AIS to the remote user device (Figure 36). The data from the remote
user device will not be looped back.
LIU Logic
AIS
Rx
Tx

Figure 35. The Modem in Local Loopback Operation

Fiber
Optical
Link
Mux-
Enc
Demux-
Dec
Normal Operation

Figure 34. The Modem in Normal Operation

Local Loopback Operation
Fiber
Optical
Link
Mux-
Enc
Demux-
Dec
2361 Modem Users Manual
Fiber Logic
Demux-
Dec
Mux-
Enc
Fiber Logic
Demux-
Dec
Mux-
Enc
LIU
Tx
Rx
LIU
Tx
Rx
5-5