ASM-61
2-Wire Symmetrical VDSL-Based Modem• Two versions of the modem areavailable:
ASM-61/CO, for installation at
the central office; generates
internal clock
ASM-61/CPE, for installation at
the customer premises; receives
the clock from the central unit.

• The Ethernet/Fast Ethernet DTE

FEATURES• 2-wire VDSL-based modem,enabling symmetricalfull-duplex data transmission• Range of up to 1.0 km(0.6 mile) at 10 Mbps line
rate over 24 AWG line
• Employs VDSL QAM line
coding for better bandwidthutilization• Ideal for LAN extensionapplications• Dedicated carrier-class unit
fully interoperable withthird-party equipment• Complies with IEEE 802.3
and 802.3q requirements• Plug-and-play operation

DESCRIPTION• ASM-61, a VDSL-based modem,operates in full-duplex mode over
2-wire 19–26 AWG lines.

• Transmitting data at 10 Mbps,

ASM-61 can be used in LAN
extension applications. In theseapplications the modem achievesa typical range of up to 1.0 km(0.6 miles).
Note: The typical range is based onerror-free real line lab tests without noise.

• The VDSL QAM technology isused to improve the bandwidth
utilization and ensure efficienttransmission, even over poor
quality lines.

interface operation complies withIEEE 802.3 and 802.3q
requirements, including VLAN
support.

• ASM-61 operates with preset

timing modes at a constant line
rate. The modem does not require
any user configuration.

ASM-61
2-Wire Symmetrical VDSL-Based ModemSPECIFICATIONSLINE INTERFACE• Type2-wire, unconditioned dedicatedlines (twisted pair)• Line Coding
QAM-based• Standard• Power Consumption• Autonegotiation• PhysicalIEEE 802.3, 802.3q
Always ON

Note: If a DTE attached to an ASM-61
modem does not support autonegotiation,
the modem automatically switches to halfduplex mode at 10 Mbps or 100 Mbps.

• Latency• Line Rate

2.5 msec for 1518-byte packet(end-to-end)

10 Mbps• RangeUp to 1 km (0.6 miles) over
24 AWG cable• Line Attenuation
See Table 1• Transmit Level
11 dBm• Connector
RJ-45

GENERAL• Timing
ASM-61/CO: Internal
ASM-61/CPE: Receive• Indicators• Impedance100Ω• Return Loss

More than 15 dB• CarrierConstantly On

10/100BASE-T INTERFACE• TypeEthernet/Fast Ethernet with VLAN
supportFront Panel:
PWR (green) – Power on
SYNC (green/red) – Line sync
statusLAN (yellow) – Ethernet traffic
statusRear Panel:
ACT (yellow) – LAN activity
statusLINK (green) – LAN integrity
status• Power

Combined AC/DC power supply:
100 to 240 VAC, 7VA–48 VDC, 7W

Table 1. Line Attenuation for
1 km at 6.05 MHz
Cable Type

Attenuation[dB]

PIC 0.4 mm/26 AWG-66.0

PIC 0.5 mm/24 AWG-53.0

PE 0.4 mm/26 AWG-64.2

PE 0.5 mm/24 AWG-50.0

PE 0.63 mm/22 AWG-41.4

PE 0.9 mm/19 AWG-29.1

FP 1.14 mm-49.7

CAT-3-71.5

CAT-5-50.0

4.6W

Height: 4.4 cm (1.7 in)
Width: 23.7 cm (9.3 in)Depth: 17.0 cm (6.7 in)
Weight 0.58 kg (1.4 lb)• Environment

Temperature: 0°–50°C (32°–122°F)
Humidity:
Up to 90%,
non-condensing

ORDERING
ASM-61/AC/CO
2-wire symmetrical VDSL-basedmodem for central office installation
ASM-61/AC/CPE
2-wire symmetrical VDSL-basedmodem for customer premises
installation
SUPPLIED ACCESSORIESAC/DC power cord
OPTIONAL ACCESSORIES
RM-33-2
Hardware kit for mounting one ortwo ASM-61 units into a 19-inch rack

APPLICATION
www.rad.com
International Headquarters
24 Raoul Wallenberg StreetTel Aviv 69719, Israel
Tel: 972-3-6458181
Fax: 972-3-6498250
Email: market@rad.com
North America Headquarters
900 Corporate Drive
Mahwah, NJ 07430, USA
Tel: (201) 529-1100
Toll free: 1-800 444-7234
Fax: (201) 529-5777
Email: market@radusa.com
182-100-03/06© 1989–2007 RAD Data Communications Ltd.
All other trademarks are the property of their respective holders.

Specifications are subject to change without prior notice.