1
Connect 8 or 24 async
devices to any of three
X.25 or Frame Relay
links.
Main links can be
RS-232, V.35, or X.21,
and have a top
aggregate data rate
of 2.15 Mbps.
Async channels can
be set for data rates up
to 115.2 kbps.
Supports async, X.25,
Frame Relay, HDLC,
SDLC, STM, and SLIP.
Built-in management
agent for configuration, monitoring,
diagnostics, statistics,
and reports.
D
o you have X.25 or Frame Relay
service? Would you like to hook
up a set of async equipment to
one, two, or three synchronous
Frame Relay/X.25 wide-area links
and switch between them all?
That’s exactly what the
Fradswitch Asynchronous
(Fradswitch A) is designed to do.
It’s a high-performance switch
that you can use for routing
between async devices and X.25
or Frame Relay connections.
All of the Fradswitch A models
have three synchronous main-link
ports. These ports can be RS-232,
V.35, or X.21—order the interface
you need. Various models have
8 or 24 async ports; these are all
RS-232, proprietarily pinned out
on RJ-45 connectors.
The main-link ports can be set
to use any of several protocols:
Besides the standard ones for
F
RADSWITCH A
PWR ERR OVF TEST
1 2 3
SYNC
DATA
123456789101112131415161718192021222324
ASYNC CHANNELS
SYNC CHANNELS
RESET
Don’t waste your time and money on modems and
analog lines! Switch your async devices between
high-speed Frame-Relay or X.25 links instead!
Key Features
FRADSWITCH A
X.25 and Frame Relay, the
Fradswitch also supports HDLC
and SDLC, the proprietary statmux protocol STM (for use with
our Stat-4, Stat-8, and Stat-24
muxes), plain async, and SLIP/
encapsulated IP.
If you configure these ports for
async or IP/SLIP operation, their
maximum data rate is 115.2 kbps
for each port. (This is also the top
rate for each async channel.) If
you configure the main-link ports
to use a sync protocol, they have
an aggregate data rate of
2.15 Mbps; that is, the total of the
three ports’ data rates, added
together, can’t exceed 2.15 Mbps.
The Fradswitch A has a
powerful terminal-based menu
system that lets you configure it
for many types of packetswitching applications, then
operate it with little or no
maintenance. The unit supports
permanent virtual circuits (PVCs)
and switched virtual circuits
(SVCs), call IDs, NUI databases,
aliasing, IP routing and routing
tables, Frame Relay funneling,
X.32 (XID) tables, SNMP
management and event reporting,
X.25 multicasting—and much,
much more!
Multi-session is also provided
on each async channel; each
channel can access up to four
separate sessions simultaneously. This Fradswitch feature
makes it easy for you to compare
data from different sources.
The Fradswitch A is
rackmountable, and it also has
flash memory, so you can keep
upgrading it—with even more
features—for as long as we keep
releasing new firmware revisions.
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: info@blackbox.com
© 2003. All rights reserved.
Black Box Corporation.
11/25/2003 #12472
2
Compliance: CE (EN 55022,
EN 50082-1, EN 60950), FCC
Part 15 Subpart B Class A,
IC Class/classe A
Interfaces:
Async channels: EIA/TIA RS-232,
DCE, proprietarily pinned on
RJ-45;
Main-link ports (all DTE):
Models with “-232T” in their
product codes: EIA/TIA
RS-232/ITU-T V.24;
Models with “-35T” in their
product codes: ITU-T V.35;
Models with “-X21T” in their
product codes: ITU-T X.21
Protocols: Async channels (async
only) and main-link ports set as
async: ITU-T X.28 or IP/
SLIP, user-selectable;
supports IP encapsulation
over X.25 (as per RFC 1356) or
Frame Relay (as per RFC 1490);
also supports dialup links for
X.25 with X.32 protocols;
Main-link ports set as sync:
Packet-switching: ITU-T X.25
or Frame Relay (userselectable);
X.25: Complies with ITU-T X.25
(1988), LAP-B;
Frame Relay: Complies with
ANSI T1.606, T1.617
Annex D, and T1.618, as
well as ITU-T Q.922
Annex A; also supports
CLLM, LMI, and ANSI PVC
management protocols;
Protocols (continued):
Main-link ports, sync (continued):
Data link (optional): HDLC,
SDLC, or STM (proprietary,
user-selectable):
STM: Compatible with Stat-4,
Stat-8, and Stat-24
statistical multiplexors;
Management: SNMP
Packet Size: X.25: Up to 4096 bytes
(4 KB); Other protocols: Up to
8192 bytes (8 KB)
Data Rate: Each async channel and
each main-link port set as sync:
75, 110, 150, 300, or 600 bps,
or 1.2, 2.4, 4.8, 9.6, 19.2, 38.4,
57.6, or 115.2 kbps, user-
selectable;
Main-link ports set as sync
(aggregate): Any combination of
data rates that, when added
together, does not exceed
2.15 Mbps
Clock Source: Internal or recovered
from receive signal
(independently user-selectable
for receive and transmit paths)
Flow Control: Async channels only:
X-ON/X-OFF
Logon Messages: Async channels
only: Herald and bulletin
(user-definable)
Command Modes: Async channels
only: ITU-T X.28 and proprietary
extensions; ITU-T X.29
Terminal Handling: Enhanced,
beyond ITU-T X.3 requirements
Maximum Distance: Standard
maximum for each interface
Memory: 2 MB RAM
User Controls:
On-screen terminal-based menu
system, including SNMP
management;
(1) Front-mounted recessed
reset pushbutton;
(1) Internal jumper on
motherboard for power-up
configuration loading
Connectors: All rear-mounted:
MT720 models: (8) RJ-45 female
for async channels;
MT722 models: (24) RJ-45 female
for async channels;
Models with “-232T” in their
product codes: (3) DB25 female
for main-link ports;
Models with “-35T” in their
product codes: (3) M/34 female
for main-link ports;
Models with “-X21T” in their
product codes: (3) DB15 female
for main-link ports;
Indicators:
(18) or (34) Front-mounted LEDs:
All models:
(1) for unit power;
(1) for hardware error;
(1) for buffer overflow;
(1) for test mode;
LEDs: All models (continued):
(3) for main-link
synchronization (one for
each main-link port);
(3) for main-link activity (one
for each main-link port);
MT720 models only:
(8) for async-channel activity
(one for each async
channel);
MT722 models only:
(24) for async-channel activity
(one for each async
channel)
Temperature Tolerance:
32 to 122°F (0 to 50°C)
Humidity Tolerance:
Up to 90%, noncondensing
Power:
From utility-power (mains) outlet,
through included 6.5-ft. (2-m)
power cord and rear-mounted
IEC 320 male inlet, to internal
transformer: Input: 100 to
240 VAC, 50 or 60 Hz
(autosensing);
Fuse: Integral 0.5 A, 250 V;
Consumption: Up to 20 watts
Size: 1.7"H x 17"W x 9.5"D
(4.3 x 43.2 x 24.1 cm)
Weight: 3.9 lb. (1.8 kg)
Specifications
The Fradswitch can be the centerpiece of just about any packet-switched network.
Fradswitch A
(MT722A-232T-R2)
Frame Relay
or X.25
Frame-
Relay
Host
Frame-Relay Router
LAN
CSU/DSU
Hub
PCs
3
Ordering Information
ITEM CODE
Fradswitch A
With RS-232 Main-Link Ports
8-Channel ..................................................................................................................................................................MT720A-232T-R2
24-Channel................................................................................................................................................................MT722A-232T-R2
With V.35 Main-Link Ports
8-Channel ....................................................................................................................................................................MT720A-35T-R2
24-Channel ..................................................................................................................................................................MT722A-35T-R2
With X.21 Main-Link Ports
24-Channel.............................................................................................................................................................MT722AE-X21T-R2
If you need a CSU/DSU, order…
CSU/DSU MS..............................................................................................................................................................................MT132A-R2
Y
ou might also need a modem…
Modem 3600 (includes a 10-ft. [3-m] RS-232 cable and a DB25-to-DB9 adapter) ...............................MD1000A-CABPAK-R2
…or Modular Statistical Multiplexors…
Stat-4 ..................................................................................................................................................................................................MX864A
Stat-8 ..................................................................................................................................................................................................MX866A
Stat-24 ................................................................................................................................................................................................MX868A
Remember to order cables…
Cables (specify length)
Shielded Twisted-Pair Patch Cable (STP) with Snagless Boots, 4-Pair, RJ-45, CAT5, Stranded, PVC,
Gray ...........................................................................................................................................................................................EVNSL60
To purchase a modular adapter, or for help building one, call Black Box Technical Support.
RS-232 Cable (NEC
®
CL2), 25 Conductors (121⁄2 pairs)—Pins 1–25, 10-ft. (3-m) .......................................ECM25C-0010-MM
V.35 Interface Cable (34-Conductor), Male/Male........................................................................................................EYN450-MM
X.21 Cable, Male/Male......................................................................................................................................................EVNX21-MM
Guard your Fradswitch with surge protectors…
Surge Protectors
CAT5 100BASE-TX Surge Protector...................................................................................................................................SP250A-R2
RS-232 DB25 (All Wires) Protector...........................................................................................................................................SP360A
V.35 Data Line Protector .......................................................................................................................................................SP143A-R2
RS-422 Surge Protector, DB15...................................................................................................................................................SP508A
• The Fradswitch A.
• A power cord.
• A control cable.
• A rackmount kit.
• A users‘ manual.
• The Packet Switching Guide.
What’s Included
• A CSU/DSU, sync modem, or
other WAN-access device.
• An STM-compatible
statistical multiplexor such as
the Stat-4, Stat-8, or Stat-24.
• Async shielded twisted-pair
cables and modular adapters.
• Depending on which model
you have, RS-232, V.35, or X.21
cable to run from the
Fradswitch to your WAN
device.
• Power-line and data-line
surge protectors.
Y ou might also need…
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