Data Sheet

ASMi-52L
2/4-wire SHDSL Modem

Plastic Enclosure

Rail-mountMetal Enclosure• Dedicated managed SHDSL modem• 2-wire and 4-wire service over any copper infrastructure

Dedicated managed
SHDSL modem for• TC-PAM line coding for extended operation range of up to 10 km (6.2 miles)
on 24 AWG
• Data rates between 64 kbps and 4608 kbps
• Four levels of QoS based on four VLAN priority queues (Ethernet units only)

2-wire and 4-wireservice over anycopper infrastructure

ASMi-52L is an SHDSL modem thatoperates in full-duplex mode over 2-wireand 4-wire lines.
Multiple data rates in the range of 64 to4608 kbps are supported. Data rates
depend on the line interface, DTE interface
types, and operating clock modes.

User ports include X.21 and V.35 and E1interfaces. A single Ethernet port option
includes a 10/100BaseT bridge with VLAN
support. A quad Ethernet port option
includes a switch with four 10/100BaseT
ports and support for VLAN ID transparent
and VLAN priority.

ASMi-52L employs standard SHDSLTC-PAM technology to extend thetransmission range (see Table 1) andenable carriers to reach morecustomers at lower costs.

The Access CompanyASMi-52L
2/4-wire SHDSL Modem

ASMi-52L is available as a standalone
plastic enclosure, or a rail-mount metal
enclosure with an extended temperature
range (4ETH service only).
Full management and monitoring of theremote unit is achieved using an
Embedded Operation Channel (EOC). The
management channel uses SHDSL
overhead bits in compliance with
ITU-T G.991.2 requirements, operating
without interfering with the datatransmission.
Management of Ethernet units is
performed via the data port.
ASMi-52L units can operate with
ASMi-52CQ cards installed in a centrally
located LRS-24 rack (see Figure 1).
VLAN priority queues enable up to fourlevels of QoS (for Ethernet units only).
Up to eight SHDSL repeaters can beinstalled in line to increase the operation
range of the modem. ASMi-52L provides
basic management of the repeaters.

Management 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.
The terminal port supports a dial-up
modem connection for remotemanagement of ASMi-52L over telephonelines.
A modem with a 4-wire line interface canbe configured to operate over 2-wirelines.
Comprehensive diagnostic capabilities
include:•Real-time alarms to alert the user on
fault conditions (reported by themanagement station)•V.54 local analog and remote digital
loopbacks•

SHDSL statistics collection for
15-minute and 24-hour intervals.

Specifications
LINE INTERFACE
Type2/4-wire unconditioned dedicated line(twisted pair)Line Coding
TC-PAM
Range
See Table 1
Impedance
135ΩConnectors
Terminal block
Protection
Per ITU K.21 and UL1950
Standards
ITU-T 991.2, ETSI 101 524, ITU-T.994.1

The current configuration can be
automatically uploaded and downloaded.

Figure 1. ASMi-52L Modems Operating with ASMi-52CQ Cards over 2-wire LinesData SheetDTE INTERFACEUSER ETHERNET INTERFACE

GENERAL

Types and Connectors
X.21: 15-pin, D-type, female
V.35: 34-pin, female
ETH (10/100BaseT bridge with VLAN
support): RJ-45
ETH switch (Four-port 10/100BaseT bridgewith VLAN ID transparent and VLAN
priority support): 4 × RJ-45

Interface
10/100BaseT

Data Rate
See Table 2Connectors
RJ-45

TimingInternal: from internal oscillator
External: from attached DTE(Serial interface only), E1
Receive: from received signal (CPE only)

ComplianceIEEE 802.3, IEEE 802.3U
MANAGEMENT

E1 INTERFACEManagement Options
Telnet via dedicated 10/100BaseT port
SNMP network management via dedicated
10/100BaseT port (Ethernet options
only)
PC, running a Web-based application

Coding
HDB3
E1 Line Impedance
Balanced: 120Ω
Unbalanced: 75Ω (via adapter cable)

Note: ASMi-52L cannot be managed with aConnector
8-pin RJ-45

dedicated E1 timeslot.

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

Jitter Performance
Per ITU G.823

Performance Monitoring
SHDSL/E1 statistics collection
Compliant with G.826
Indicators
PWR (green) – PowerTST (red) – Test in progress
E1 SYNC (red) – Loss of E1 sync (E1 only)
SYNC A/B (green/red) – Sync status ofSHDSL line
DATA (yellow) – Transmit data
ALM (red) – Alarm enters the buffer

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

Note: An adapter cable can be ordered forDiagnostics
Local analog loopback compliant withITU V.54
Remote digital loopback compliant withITU V.54

Ethernet Port (for ETH and 4ETH
options only)Interface: 10/100BaseT
Connector: RJ-45

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

2-wire[km][miles]4-wire[km][miles]

64

7.5

4.6——

128256

7.0
6.7

4.3
4.1

7.1
6.84.4
4.2

384
512

6.5
6.3

4.0
3.9

6.7
6.6

4.1
4.1

1024
1536

5.3
5.0

3.3
3.1

6.0
5.6

3.7
3.5

2048
2304
4096
4608

4.5
4.2––

2.8
2.6––

4.7
4.5
3.7
3.0

2.9
2.8
2.3
1.8

Note: Typical ranges are based on error-free lab tests without
noise.
ASMi-52CD/4W operates at data rates up to 4608 kbps,
depending on internal or external clock.

Table 2. Data Rates by Clock ModeLine

External/
Receive[kbps]

E1 InternalInternal[kbps][kbps]

2-wiren x 64n x 64
wheren = 1 to 32

64, 128, 192, 256,384, 512, 576, 768,1024, 1152, 1536,2048, 2304

4-wiren x 128n x 128
wheren = 1 to 16

128, 256, 384, 512,768, 1024, 1152,1536, 2048, 2304,3072, 4096, 4608

where n = 1to 32, 36
Note: V.35 and X.21 cannot operate with ASMi-52L/E1 at data rates of64 kbps and 128 kbps.

Data Sheet
ASMi-52L
2/4-wire SHDSL Modem*User interface:
X.21 X.21
V.35 V.35
E1G.703 E1
ETH 10/100BaseT port
4ETH 4 x 10/100BaseT withintegrated switch#Line interface:
2W 2-wire
4W 4-wire

STANDARD CONFIGURATIONPower Consumption
8W max (4-wire)
6W max (2-wire)
Environment
Temperature: 0–50°C (32–122°F)
Extended temperature support (rail-mountversion only): -20° to 70°C (-4° to 158°F)
Humidity: Up to 90%, non-condensing
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)

ASMi-52L/E1/2W
ASMi-52L/E1/4W
ASMi-52L/ETH/2W
ASMi-52L/ETH/4W
ASMi-52L/4ETH/2W
ASMi-52L/4ETH/4W
SPECIALCONFIGURATION
ASMi-52L/*/#
2/4-wire SHDSL standalone modem

SUPPLIED ACCESSORIES

ASMi-52L/24V/4ETH/#/RAIL/ETR
2/4-wire SHDSL rail-mount modem with
4ETH user interface, 24 VDC power supply
and extended temperature support
Note: the rail-mount version has TB for the lineinterface.

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)

Power cord
AC/DC adapter for -48 VDC
OPTIONAL ACCESSORIESCBL-DB9F-DB9M-STR
Control port cable
CBL-RJ45/2BNC/E1Interface adaptor for converting abalanced E1 RJ-45 connector into a pairof BNC unbalanced coaxial connectors
RM-33-2
Hardware kit for mounting one or two
ASMi-52L units in a 19-inc

Table 2 Modem Comparison Chart
ASMi-52

ASMi-52L

ASMi-54

Max. data rate(Mbps)

2.3/4.6

2.3/4.6

5.7/11/22

Interface

V.35, RS-530, X.21,
E1, ETHV.35, X.21, E1, ETH, 4 x ETH, E1/4 x E1
4 x ETH

5.7/11.4 (11.4/15 per 5.7/11
pair with license key)4 x ETH, E1
4 x ETH, E1RouterLine

32W/4W

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

ASMi-54LRT

ASMi-54L

2W/4W

2W/4W/8W

2W/4W

2W/4W/8W

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. 80366

The Access Company

465-100-06/11 (2.0) Specifications are subject to change without prior notice. © 1988–2011 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.

LegendOrdering

Power
AC/DC: 100 to 240 VAC,
-48/-60 VDC nominal
24 VDC (rail-mount version only)