Features
- The ASM-32, dual port, sync/async short range
modem, operates full duplex over 2-wire twisted pair, at selectable data
rates from 1.2 kbps to 128 kbps.
- Each port can operate sync or async, at data rates
from 1.2 kbps up to 64 kbps, and has a digital interface independent from
the second port. When operated at 128 kbps (sync), only one port can be
used.
- Full duplex operation over 2-wires is achieved
using an echo cancelling technique. ASM-32 uses 2B1Q line coding, and
provides an operating range of up to 8 km (5 miles) over 24 AWG cable,
independent of the data rate. The line interface includes an adaptive
equalizer, which provides better noise immunity and high performance over
low quality lines.
- Three clock modes are available:
- Internal: ASM-32 generates the clock
- Receive (loopback): the clock is recovered from the line
- External: the clock received on port 1 is used as the system clock.
- An internal 511-bit test pattern generator is
available in each port for diagnosing the ports and the main link
connections. Six different V.54 loopbacks are available to check each port
or main link integrity. The loopbacks are controlled by either a front
panel switch or from each of the digital interfaces.
- Front panel indicators provide indication for TD,
RD, RTS, DCD, local and remote loopbacks, general sync loss for each port,
and power indication.
- Digital interfaces include
V.24/RS-232, V.35, V.36/RS-449 (RS-530 version plus cable for DB-37
connector), RS-530, X.21, or G.703 Codirectional (64 kbps), and Ethernet.
- Two different analog line interface connectors are
available: RJ-45 or 3-port terminal block (see Ordering).
- ASM-32 is supplied as a standalone unit. Special
hardware (RM-17) for mounting one or two units in a 19" rack can be
ordered separately
Specifications
- Extended range, dual port, short range modem
- Full duplex operation over two wires using echo
cancellation
- Two independent async/sync channels
- Wide selection of data rates
Sync: 1.2 up to 128 kbps
Async: 1.2 up to 38.4 kbps
- Operates in point-to-point applications or opposite
MP-2000 HS-U module
- Operating range up to 8 km (5 miles) over 24 AWG
cable, independent of data rate
- Supports digital interfaces: V.24/RS-232, V.35,
V.36, RS-530, X.21, G.703 Codirectional, and IR/ETH
- Any combination of interfaces for the two ports
- Built-in pattern generator and six different V.54
diagnostic loops
ASM-32/*/#/+/&
Dual port, 2-wire standalone, short range modem
| * |
Specify power supply:
115 for 115 VAC
230 for 230 VAC
48 for -48 VDC |
| # |
Specify line connector:
TB for terminal block connector
RJ for RJ-45 connector |
| + |
Specify Port 1 interface:
V24 for V.24/RS-232 interface
V35 for V.35 interface
X21 for X.21 interface
530 for RS-530 interface
703TB for G.703 Codirectional 64 kbps with terminal block
703RJ for G.703 Codirectional 64 kbps with RJ-45 connector
UTP for built-in Ethernet/802.3 bridge with RJ-45 connector
BNC for built-in Ethernet/802.3 bridge with BNC connector |
| & |
Specify port 2 interface if different from port
1:
(Default is same interface) |
RM-17
Hardware for mounting one or two standalone units in a 19" rack
ORDERING INFO
ASM-32/1/RJ/V24/V24
ASM-32/1/RJ/V35
ASM-32/1/TB/V35
ASM-32/2/RJ/V35/V24
ASM-32/4/RJ/530
ASM-32/4/RJ/V35
APPLICATION
Figure 1. Point-to-point Application
Figure 2. ASM-32 Working Opposite MP-2000
|
