Telenetics MOT202TSA - Manual (Page 22)

Front Panel Test Switch
Page 23
Figure 3-1. Analog Loopback Test
Figure 3-2. Digital Loopback Test
Figure 1 - Analog Loopback Test
DTE
DTE
RECEIVER
TRANSMITTER
PAD
TRANSMITTER
RECEIVER
Local Modem
Analog LoopBack Mode
RXD
TXD
4-Wire Telephone Line
Remote Modem
Data Mode
Amplifier
Digital Loopback Test
DTE DTE
RECEIVER
TRANSMITTER
TRANSMITTER
RECEIVER
Local Modem
Local Digital LoopBack Mode
4-Wire Telephone Line
Remote Modem
Data Mode