2
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
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)
