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Chapter 1 Introduction ASM-20 Installation and Operation Manual
1-2 Overview 02-Aug-2005 10:47
G.703
DIGITAL
SERVICE
NETWORK
ASM-20
EXT CLK
ASM-20
RCV CLK
RAD
RAD
Terminal
ASM-20
EXT CLK
ASM-20
RCV CLK
RAD
RAD
DTE
Figure 1-2. G.703 Modem Link Application
ASM-20
G.703 or
X.21/RS-530/V.24
or V.35 or ETH
DTE
RAD
ASM-20
RAD
Figure 1-3. Tail-end for Digital Network Application
Features
ASM-20 features V.54 diagnostic capabilities for performing local analog loopback
and local and remote digital loopback. The operator at either end of the line may
test both modems and the line when in digital loopback mode. The loopback is
controlled by either front panel push buttons or via the DTE interface.
Options
The following DTE interface options are available:
• V.24/RS-232(up to 64 kbps)
• V.35
• X.21
• RS-530
• V.36
• G.703 (64 kbps co-directional)