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Call AIRLINX Toll Free 1-888-224-6814
E-mail: sales@airlinx.com
 WHAT ARE LINE & PORT SHARING UNITS
CHOOSING LINE & PORT SHARING UNITS
SPECIFICATIONS FOR LINE & PORT SHARING UNITS
 ps |
LINE & PORT
SHARING
UNITS |
| DEI's Port Sharing units connect four or
eight terminal devices or communications controllers to a single modem, CSU/DSU or
computer port in a polled communication system environment. You can cascade the units to
link additional terminals or controllers. Applications range from simple modem or router
sharing to true front end processor port sharing. |
| Model 1710 is a full featured port and
line sharing device, that is able to rephase the receiving clock and data sources to
provide extremely reliable tail circuit operations. Easily accessible switches on the
front panel allow you to set speeds, program RTS/CTS delay and direct the master clock to
any of the five ports. All interfaces are V.35 (M-34 female) connectors and operate at 56
or 64 Kbps on internal clock, up to 1.544 Mbps on external clock. Model 1710 allows up to
4 terminal devices on tail circuits (modems or CSU/DSU) to share a single port, modem or
CSU/DSU operating in a multi-point, polled, system environment. Cascade the 1710's
to provide additional terminal connections. |
| The Model 1720, 1721, and 1731
Line Sharing Units provide immediate system expansion without the need to acquire
additional computer ports, modems or data lines. These units allow four or eight polled
synchronous or asynchronous devices to use one modem or CSU/DSU. When an address poll is
received, the DEI line sharing unit will broadcast to all terminals or
controllers. The first terminal or controller to raise RTS (Request to Send) in answer to
a poll will be selected and all others will be denied access until RTS is lowered. Model
1720 interfaces with V.35 (M-34 female) connectors and both Model 1721
and Model 1731 interface with RS-232 (DB25) connectors. |
| DEI's Model 1700 and 1701 Port Sharing Units
are equipped with internal clock generation that shares four terminal devices direct
connections through a single port on a front end communication processor. These units can
be cascaded to increase the number of devices that will share the CPU port. The unit's CPU
port is switchable from DTE to DCE and is equipped to generate all clock, data and control
interchange signals required in a polled, synchronous system environment. Programming is
easily accomplished via switches on the rear panel. By switching the external clock, these
versatile devices will operate in the identical manner as the Model 1720
and 1721. Model 1700 interfaces with V.35 (M-34 female)
connectors and Model 1701 interfaces with RS-232 (DB25 female)
connectors. |
| SPECIFICATIONS for Line & Port Sharing Units |
|
Model
1720 |
Model
1721 |
Model
1731 |
Model
1710 |
Model
1700 |
Model
1701 |
| Interface |
CCITT V.35 |
RS-232 |
CCITT V.35 |
RS-232 |
| Connector |
M-34 female |
(DB-232) |
(M-34 female) |
(DB25) |
| Data
Rates |
Up to 1.544 Mbps |
Up to 19.2 Kbps |
Up to 1.544 Mbps |
Up to 100 Kbps |
Up to 19.2 Kbps |
| Ports |
Four |
Eight |
Four |
| Timing |
External Clock |
External or Internal
Clock |
| Mode |
|
Half Duplex |
Full or Half Duplex |
| Controls |
Disable switch for
streaming terminals |
Automatic |
Disable Switch |
| Power |
115 VAC 50/60
Hz................230 VAC 50/60 Hz |
| Size |
1.72"H x
15"W x 5.375"D |
3.5"Hx16"Wx9"D |
2.5"Hx8.8"Wx12.6"D |
| Weight |
6 pounds |
8 pounds |
6 pounds |
| Rackmount |
Optional kit, Part
No. 2A83 |
Part No. 2B351 |
Part No. 2A483 |
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