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ASMi-52
2/4-wire SHDSL Modem/Multiplexer

Plastic Enclosure

Metal Enclosure

Rail-mount
Metal Enclosure

Dedicated managed

 SHDSL modem for effective provisioning of TDM and Ethernet data services atrates of up to 4.6 Mbps

SHDSL modem for Ethernet and E1 or serial data services multiplexed over SHDSL

Ethernet, E1 and serial
services over 2- or Operating range of up to 7.5 km (4.6 miles) on 26 AWG
 Data rates between 64 kbps and 4608 kbps
 Special rail-mount metal chassis for railways applications

4-wire copper lines

The Access Company

ASMi-52
2/4-wire SHDSL Modem/Multiplexer

ASMi-52 is an SHDSL modem/multiplexer
for data and voice that operates infull-duplex mode over 2-wire and 4-wirelines.
Multiple data rates in the range of 64 to4608 kbps are supported. The data rates
depend on the line interface, DTE
interface types, and operating clockmodes.
ASMi-52 employs standard SHDSL TC-PAM
technology to extend the transmission
range (see Table 1), thus enabling carriers
to reach more customers at lower costs.
The following DTE interfaces are available:
X.21, V.35, RS-530, and G.703/G.704 E1or T1. For LAN to-LAN connectivity using
SHDSL technology, the modem features abuilt-in 10/100BaseT bridge Ethernet portwith VLAN functionality.

When equipped with two interfaces, thestandalone ASMi-52 units combine andmultiplex user traffic over the SHDSL link.
The following DTE combinations areavailable:
Serial Port (V.35, X.21, RS-530) + LAN



E1 + LAN

E1 + serial port (V.35, X.21, RS-530).

Note: T1 multiplexer units are not available.

4-wire line interface modems can beconfigured to operate over 2-wire lines.
The modem uses an Embedded Operation
Channel (EOC) for controlling andmonitoring the remote unit. The
management channel uses SHDSL
overhead bits in compliance with
ITU-T G.991.2 requirements, operating
without interfering with the datatransmission.

ASMi-52 units can operate with centrally
located LRS-102 racks with ASMi-54C/N
modules, DXC-8R/10A/30 chassis with
D4SL/D8SL modules, MP-2100/2104
chassis with MSL-8 modules or MP-4100
chassis with the M8SL or ASMi-54C/N
modules.
User-configurable low-speed mode isavailable for units with serial and LANinterfaces. In this mode ASMi-52 operates
at 64/128 kbps (2-wire) and
128/256 kbps (4-wire) data rates whenworking with devices with E1 DTE
interface. The maximum data rate inlow-speed mode is 2048 kbps.
Up to eight SHDSL repeaters can beinstalled in line to increase the operation
range of E1 based modems. ASMi-52
provides basic management of therepeaters.

Figure 1. Cost-Effective SHDSL/SHDSL.bis Line Connectivity

Data Sheet

The minor and major alarms can berelayed to a remote alarm device via an
optional terminal block port.
QoS is enhanced by prioritizing the LAN
packets to the DSL line according to fourlevels of VLAN priorities. The user canenable or disable the VLAN priority, andeach VLAN priority (0–7) tag can be
assigned to one of four priority levels.
ASMi-52 is available as standalone plastic
or metal enclosures, and rail-mount metalenclosures. The plastic and metal
enclosures are also available in extended
temperature versions (by special request).

MANAGEMENTDIAGNOSTICSManagement operations can be performed
using an ASCII terminal, a Telnet host, a
web-based management application, orRADview-EMS. The latter is a Java-based,client-server, modular, scalable element
management system that provides secure
configuration and fault management
capabilities.

Comprehensive diagnostic capabilities
include:The terminal port supports a dial-up
modem connection for remotemanagement of ASMi-52 over telephonelines.
SNMP management can be performed via
a 10/100BaseT port or a dedicated E1/T1
timeslot.

Real-time alarms to alert the user on
fault conditions



V.54 local analog and remote digital
loopbacksSHDSL and E1/T1 statistics collection
for 15-minute and 24-hour intervals.

BER test can be performed by themultiplexer units on each serial interface.
The BERT generates and receives four
different test patterns.

When ASMi-52 is ordered with only the
10/100BaseT port, it can be used totransfer both user and management data.

Figure 2. ASMi-52 Operating Opposite Megaplex-4100 over STM-1

ASMi-52
2/4-wire SHDSL Modem/Multiplexer

Specifications
LINE INTERFACEType
2/4-wire unconditioned dedicated line(twisted pair)Line Coding
TC-PAMDTE INTERFACE
Data RateDepends on the DTE/line interface typeand clock mode:
2-wire:64 to 2304 kbps (ext. clock)

64 to 2048, 2304 kbps (int. clock)

64 to 1536 kbps (T1)

Range
See Table 14-wire:

128 to 4608 kbps (ext. clock)

Impedance135

128 to 4096, 4608 kbps (int. clock)

64 to 1536 kbps (T1)

Compliance
ITU-T 991.2, ETSI 101 524, ITU-T G.994.1
Connector
RJ-45

Note: The multiplexer option E1+V.35 can operate
at up to 4096 kbps in applications with
Megaplex-4100 and up to 2048 kbps in all otherapplications.

Interface and Connectors
X.21: 15-pin, D-type, female
V.35: 34-pin, female
RS-530: 25-pin, D-type, female
E1: RJ-45
T1: RJ-45
ETH (10/100BaseT bridge with VLAN
support): RJ-45

Table 1. Typical Ranges (26 AWG)
Data Rate[kbps]
64
128
256

2-wire[km][miles]
7.5
4.6
7.0
4.3
6.7
4.1

4-wire[km][miles]
——
7.1
4.4
6.8
4.2

384
512
1024
1536

6.5
6.3
5.3
5.0

4.0
3.9
3.3
3.1

6.7
6.6
6.0
5.6

4.1
4.1
3.7
3.5

2048
2304

4.5
4.22.8
2.6

4.7
4.5

2.9
2.84096
4608

––––

3.7
3.0

2.3
1.8

Note: The typical ranges are based on error-free lab tests without noise.

Data Sheet

E1/T1 INTERFACEUSER ETHERNET INTERFACEMANAGEMENT PORTS

Data Rate
E1: 2048 kbps
T1: 1544 kbps

Interface
10/100BaseT

V.24/RS-232 Control PortInterface: V.24/RS-232 DTE
Connector: 9-pin D-type, female
Format: asynchronous
Baud rate: 9.6 to 115.2 kbps

Connectors
RJ-45Coding
E1: HDB3
T1: B8ZS or AMI

Frame Size
1580 bytes

Line Impedance
Balanced E1: 120
Unbalanced E1: 75 (via adapter cable)
Balanced T1: 100Ethernet PortInterface: 10/100BaseT
Connector: RJ-45 shieldedComplianceIEEE 802.3, 802.3U

ALARM PORTTypeDry relay contacts for major and minor
alarmsConnector
8-pin RJ-45
Note: An adapter cable can be ordered forConnector
9-pin D-type female

converting the main link RJ-45 connector into a pairof BNC connectors for unbalanced E1 coax
interface.

E1 Jitter Performance
As per ITU G.823

Modem Comparison Chart
ASMi-52
2.98

Max. data rate 2.3/4.6(Mbps)
V.35, RS-530, X.21,
Interface
E1, ETH

ASMi-52L
2.01

ASMi-54
3.51

2.3/4.6

5.7/11/22

V.35, X.21, E1, ETH,
4 x ETH

4 x ETH, E1/4 x E1

ASMi-54L
2.66

5.7/11.4 (11.4/15 perpair with license key)
4 x ETH, E1

RouterLine

ASMi-54LRT
2.1

5.7/114 x ETH, E1


2W/4W

2W/4W

2W/4W/8W

2W/4W

2W/4W/8W

ASMi-52
2/4-wire SHDSL Modem/Multiplexer

GENERAL
TimingInternal, from internal oscillator
External, from attached DTE
Receive, from received signal (CPE only)
Diagnostics
Local analog loopback in compliance withITU V.54
Remote digital loopback in compliancewith ITU V.54
Remote loopback at the SHDSL repeater
BER test on multiplexer units
Performance Monitoring
SHDSL statistics collection
E1 with CRC-4 or T1 with ESF framing(per ITU G.706)
E1 without CRC-4 or T1 with SF framing(BPV)
Compliant with G.826
Indicators
PWR (green) – Power on
DATA (yellow) – Transmit data(except E1 or T1 interface)
SYNC A/B (green/red) – Sync status of DSLline
E1 or T1 SYNC (red) – Loss of E1 or T1sync (E1 or T1 interface only)
AIS (yellow) – “All 1s” string is received(E1 or T1 interface only)
ALM (red) – Alarm enters the buffer
TST (red) – Test in progressPower
100–240 VAC, 50/60 Hz or 48/60 VDC
nominal (40 to 72 VDC)
24 VDC nominal (18 to 36 VDC)
Power Consumption
4-wire: 7W max
2-wire: 6W max
PhysicalPlastic enclosure:
Height: 43.7 mm (1.7 in)
Width: 217 mm (8.5 in)
Depth: 170 mm (6.7 in)
Weight: 0.6 kg (1.3 lb)
Metal enclosure:
Height: 43.7 mm (1.7 in)
Width: 215.5 mm (8.5 in)
Depth: 153 mm (6.0 in)
Weight: 0.7 kg (1.5 lb)
Rail-mount metal enclosure:
Height: 150 mm (5.9 in)Width: 70 mm (2.8 in)
Depth: 163 mm (6.4 in)
Weight: 0.9 kg (1.9 lb)
Environment
Standard temperature: 0 to 50C(32 to 122F)
Extended temperature: -20 to 70C(-4 to 158F)
Humidity: Up to 90%, non-condensing

Data Sheet

Ordering%

STANDARD CONFIGURATIONS

Second interface (Default=single DTEinterface):
ETH

ASMI-52/E1/2W/ETH
ASMI-52/E1/4W/ETH
ASMI-52/ETH/2W

Note: In the T1 interface units, this port isfor management only.

ASMI-52/ETH/4W
ASMI-52/E1/2W

V.35 V.35 (only for models with 1stE1 interface)

ASMI-52/E1/4W
ASMI-52/V35/2W/ETH$

ASMI-52/V35/2W

Alarm relay port (Default=no alarmrelay)AR

SPECIAL CONFIGURATIONS
ASMi-52/@/*/#/%/$/?/+
2/4-wire SHDSL standalone modem

10/100BaseT (only for modelswith 1st E1, T1 or serial DTEinterfaces)?

Enclosure (Default=plastic enclosure)ME

Metal enclosure

LegendTemperature (Default=0 to 50C(32 to 122F))@ETRPower supply (Default=wide-range
AC/DC power supply):
24V*

24 VDCDTE interface:
X21

X.21

V35

V.35

RS530 RS-530
ETH

10/100BaseT

E1

E1Note: For E1 unbalanced interface, order
CBL-RJ45/2BNC/E1 adaptor cable

T1#T1

Line interface:
2W

2-wire4W

4-wire+Alarm relay port (6-pin)

Extended range: -20 to 70C(-4 to 158F)

ASMi-52/ETH/4W/ME/AR/RAIL
4-wire SHDSL rail-mount modem,
wide-range AC/DC power supply
ASMi-52/24/ETH/4W/ME/AR/RAIL
4-wire SHDSL rail-mount modem, 24 VDCpower supply
Note: Rail-mount versions have TB for the lineinterface.

Data Sheet
ASMi-52
2/4-wire SHDSL Modem/Multiplexer

Mount Kits

Power cord

RM-33-2
Hardware kit for mounting one or two
plastic ASMi-52 units in a 19-inch rack

AC/DC adapter plug (when -48 VDC isordered)
PLUG-DC/TB-S
DC adapter plug (when 24 VDC is ordered)

RM-35/@
Hardware kit for mounting one or two
metal ASMi-52 units in a 19-inch rack

OPTIONAL ACCESSORIES

LegendCBL-RJ45/2BNC/E1Interface adapter for converting abalanced E1 RJ-45 connector into a pairof BNC unbalanced coaxial connectors@CBL-DB9F-DB9M-STR
Control port cable

WM-35-TYPE4
Hardware kit for wall mounting 8.5" units
in metal enclosure

International Headquarters
24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel. 972-3-6458181
Fax 972-3-6498250, 6474436
E-mail market@rad.com

www.rad.com

148-100-04/12 (2.9) Specifications are subject to change without prior notice.  1988–2012 RAD Data Communications Ltd. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven,and the product names Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders.

SUPPLIED ACCESSORIESRack mount kit (Default=both kits):
P1

Mounting one unit

P2

Mounting two units

North America Headquarters
900 Corporate Drive
Mahwah, NJ 07430, USA
Tel. 201-5291100
Toll free 1-800-4447234
Fax 201-5295777
E-mail market@rad.com

Order this publication by Catalog No. 803337

The Access Company