General Information
Thank you for your purchase of this Black Box product. This prod-
uct has been thoroughly inspected and tested and is warranted for
One Year parts and labor.
Features
• Multi-Rate Symmetric DSL
• CAP (Carrierless Amplitude and Phase) Modulation
• Data Rates up to 2.304Mbps
• V.35 and X.21 Interfaces
• Interoperable with the MDU9700
• SNMP Manageable via SNMP Management Module
• NetLink Plug ‘n’ Play for Easy Installations
• Universal Power Options, 120VAC, 230VAC and -48VDC Available
• Front Panel Status Indicators
• Small, Convienent Desktop Unit
• CE Marked
Description
The Black Box Compact
mDSL Modem provides high speed 2-
wire connectivity to ISPs, PTTs, and corporations using mDSL (Multi-
rate Symmetric Digital Subscriber Line) technology. Multi-rate DSL
offers the ability to deliver the maximum bit rate that a twisted pair line
can accommodate. Supporting multiple line rates from 144kbps to
2.320Mbps, the modem provides “megabyte” speeds to leased line,
LAN to LAN interconnection, and WAN access networks over 3.6
miles/5.8km (1.054Mbps on 24AWG/.5mm wire).
The MDU9705A-V35 provides a V.35 interface on an M/34 female
connector. MDU9705A-X21 provides an X.21 interface on a DB-15
female connector. Features include loopback diagnostics,
SNMP/HTTP remote management capabilities using NetLink Plug-and-
Play and inband externally accessible configuration switches. All ver-
sions of the Compact mDSL Modem are compatible with Black Box’s
mDSL standalone and mDSL Access rack card.
As a symmetric DSL NTU,
mDSL offers the same data rates in
both directions over a single pair of regular telephone lines using
Carrierless Amplitude and Phase (CAP) modulation. Line connection
is made by an RJ-45 jack. Standard versions of the Compact mDSL
Modem are powered by a 100/230VAC(Universal) supply. The DC
power supply option supports any DC input between 36-72VDC.
3
Compact mDSL Modem
4
Compact mDSL Modem
Configuration
The Compact mDSL Modem is equipped with two sets of eight
DIP switches, which allow configuration of the unit for a wide variety of
applications. This section describes switch locations and explains all
possible configurations.
Configuring the Hardware DIP Switches
The 16 external switches are grouped into two eight-switch sets,
and are externally accessible from the underside of the Compact
mDSL Modem (See Figure 1).
The two sets of DIP switches on the underside of the Compact
mDSL Modem will be referred to as S2 and S3. As Figure 2 shows,
the orientation of all DIP switches is the same with respect to “ON” and
“OFF” positions.
Figure 2. Close Up of Configuration Switches (all sets are identical in appearance)
Figure 1. Underside of Compact mDSL Modem, Showing Location of DIP Switches
Front
Back
On
S2
S3
Off
1
2
3
4
5
6
7
8
ON
OFF
ON
