
Installation and Operation Manual Chapter 1 Introduction
ASM-40CD Ver. 1.0 Technical Specifications 1-9
DTE Interface
Type
V.24, V.35, V.36, X.21, RS-530, IR-ETH
Data Rate
32, 64, 128, 192, 256, 384, 512, 768, 1024, 1536,
1544, 1920 and 2048 kbps
Interface Modules
• LRSI-F/B-5 – V.24, V.35, V.36, X.21, RS-530 via
SCSI-26 female connectors
• LRSI-F/B-14 – IR-ETH, IR-ETH/QN via RJ-45 connectors
Timing
Transmit and
Receive
• Internal – From on-board oscillator
• External – From the DTE
• Receive – Derived from the receive signal
Indicators
POWER ((green)
ON – ASM-40CD is powered
TD (yellow)
ON – Steady SPACE is transmitted
Blinks – Data is transmitted
RD (yellow)
ON – Steady SPACE is received
Blinks – Data is received
RTS (yellow)
ON – DTE activates Request-to-Send
DCD (yellow)
ON – A valid receive line signal is present
SYNC LOS (red)
ON – There is no synchronization between the two
modems
TEST (red)
A test is active
ERR (red)
ON – The internal BER tester detects an error in the
received data or sync loss in BER test
Diagnostics
Loopbacks
ITU V.54:
• Local analog loopback, activated via terminal, SNMP
management tool or by the DTE interface signal
• Remote digital loopback, activated via terminal, SNMP
management tool or by the DTE interface signal
• Local digital loopback, activated via terminal or SNMP
management tool
BERT
Built-in pattern generator and tester activated from
terminal, complies with ITU V.52
Physical
Up to 12 ASM-40CD modem cards can be
accommodated per LRS-24 hub
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