Black Box mt760a Guia De Especificaciones

Main-Link Ports
(All Numbered Ports Except
Port 1 on “-DDS” Models)

Clock Source: Internal or recovered

(user-selectable)

Data Rate: Any port configured as

synchronous:

Any data rate that, when
added to the data rates of all
other synchronous main-link
ports, does not total more than
2 Mbps;

Any port configured as
asynchronous:

115,200, 57,600, 38,400, 19,200,
9600, 4800, 1200, 600, 300, 150,
110, or 75 bps
(user-selectable)

Distance (Maximum): Standard

maximum for each interface

Interfaces: Models with “232” in

their product code: EIA/TIA

RS-232 (ITU-T V.24/V.28);

Models with “530” in their
product code: EIA/TIA RS-530;
Models with “V35” in their
product code: ITU-T V.35;
Models with “X21” in their
product code: ITU-T X.21;
All either DTE or DCE
(user-selectable)

Packet Size: X.25: Up to 4096 bytes;

Other protocols: Up to 8192 bytes

Protocols: X.25, Frame Relay, HDLC,

STM (proprietary), IP/SLIP, or
async (user-selectable):

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;

Specifications

Multiplex I/O to or from two sources at each local site across X.25, Frame Relay,

or packet-switched Internet links for fast, economical WAN datacomm.

Non-secure

LAN

Secure

LAN

Server

Router

CSU/DSU

Fradswitch-3 A/S

Fradswitch-3

A/S

Host

Firewall

Frame

Relay

STM: Compatible with Stat-4

(MX864A), Stat-8 (MX866A),

and Stat-24 (MX868A)

statistical multiplexors;

IP: Supports encapsulation

over X.25 (as per RFC 1356)
or Frame Relay (as per RFC
1490), as well as dialup links
for X.25 with X.32 protocols

Connectors:

On rear panel: (2) DB25 F (“-DDS”

models) or (3) DB25 F (all
other models);

On adapter cables:

For each V.35 port: (1) M/34 F;
For each X.21 port: (1) DB15 F

DDS Port
(Port 1 on “-DDS” Models Only)

Attenuation: Up to 43 dB

Clock Source: Either internal

(transmit) or recovered from line
signal (receive), user-selectable

Data Rate: 4.8, 9.6, 19.2, or 56 kbps

(user-selectable)

Distance (Maximum):

Over 24 AWG (0.6-mm) wire:

6.5 mi. (10.5 km) at 9.6 kbps,
5 mi. (8 km) at 19.2 kbps, or
4 mi. (6.4 km) at 56 kbps

Interface: Digital Data Service

(DDS) as per AT&T

Pub. 62310

Received BPVSequence: Out of

service (OOS), out of frame
(OOF), DSU loopback

Transmit BPVSequence: Zero

suppression

Connector: (1) rear-mounted RJ-48 F

Control Port

Command Modes: X.28, extended

Data Rate: 38,400, 19,200, 9600, 4800,

1200, 600, 300, 150, 110, or 75 bps
(user-selectable)

Distance (Maximum): 50 ft. (15.2 m)

Flow Control: Hardware (RTS/CTS)

or software (X-ON/X-OFF), user-
selectable

Terminal Handling:

Enhanced asynchronous
(exceeds X.3 requirements)

Connector: (1) front-mounted

RJ-45 F

The Unit As a Whole

Compliance: CE, FCC Part 15

Subpart B Class A, DOC
Class/MDC classe A

User Controls: (1) front-mounted

recessed reset pushbutton;

(1) internal jumper for power-up

configuration loading;

(3) internal jumper banks for DTE

vs. DCE;

“-X21” models only: (3) additional

jumpers for DTE vs. DCE;

Firmware-resident terminal-

based configuration menus

Indicators: (11) front-mounted LEDs:

PWR (unit power); ERR (error);
OVF (buffer overflow); TEST;
SYNC 1, 2, and 3 (main-link
synchronization); ACTIV 1, 2,
and 3 (main-link data activity);
ACT (control-port data activity)

Temperature Tolerance: 32 to 122°F

(0 to 50°C)

Humidity Tolerance: Up to 90%,

noncondensing

Power: From AC outlet, through

detachable 5-ft. (1.5-m) power
cord and internal transformer:

Nominal input: 100–230 VAC,

47–63 Hz;

Input-voltage tolerance:

90–253 VAC;

Consumption: 30 watts

Size: 1.75"H x 8.5"W x 9.4"D

(4.4 x 21.6 x 23.9 cm)

Weight: 2.6 lb. (1.2 kg)