Black Box mt720a Техническое Руководство
1
Connect 8 or 24 async
devices to any of three
X.25 or Frame Relay
links.
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.
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.
be set for data rates up
to 115.2 kbps.
Supports async, X.25,
Frame Relay, HDLC,
SDLC, STM, and SLIP.
Frame Relay, HDLC,
SDLC, STM, and SLIP.
Built-in management
agent for configur-
ation, monitoring,
diagnostics, statistics,
and reports.
agent for configur-
ation, monitoring,
diagnostics, statistics,
and reports.
D
o you have X.25 or Frame Relay
service? Would you like to hook
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?
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.
(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.
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
Besides the standard ones for
FRADSWITCH A
PWR
ERR
OVF
TEST
1
2
3
SYNC
DATA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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 stat-
mux protocol STM (for use with
our Stat-4, Stat-8, and Stat-24
muxes), plain async, and SLIP/
encapsulated IP.
Fradswitch also supports HDLC
and SDLC, the proprietary stat-
mux 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.
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 packet-
switching applications, then
operate it with little or no
system that lets you configure it
for many types of packet-
switching 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!
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 simultan-
eously. This Fradswitch feature
makes it easy for you to compare
data from different sources.
channel can access up to four
separate sessions simultan-
eously. 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.
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