Black Box 38892-R2 Bedienungsanleitung

Support up to 4, 8, or 16 channels over

fiber optic cable in limited-distance applications.

Support up to 4, 8, or 16 channels over

fiber optic cable in limited-distance applications.

4-, 8-, and 16-Port Fiber Optic Muxes

FREE 24-hour Tech Support: 724-746-5500

blackbox.com

2 of 3

6/7/2007

#22505

724-746-5500 blackbox.com

FEATURES

• Fiber optic multiplexor and line driver

in one compact unit.

• Ideal for limited-distance applications.

• Easy to install—no option switches to

set.

• Transparent to speed and protocol.

• Operates at distances up to 10,000 feet

(3048 m) over duplex multimode fiber

optic cable.

• Supports software (X-ON/X-OFF)

flow control.

Use the multimode fiber optic cable in your small-to-medium-sized campus

to connect 16 PCs to an async host up to 10,000 ft. (3048 m) away

with the 16-Port Fiber Optic Mux.

OVERVIEW

Why buy a mux and a line driver separately when you can

get both in one convenient package. If you have fiber optic

cable installed in your small-to-medium-sized campus,

consider our 4-, 8-, or 16-Port Async Local Fiber Optic RS-232

Muxes.

These async time-division multiplexors support up to 4,

8, or 16 channels at speeds up to 19.2 kbps (38890-R2 or

38892-R2) or 64 kbps (38888-R2). And the integral line driver

for duplex multimode fiber gives you point-to-point

communications over short distances (up to 10,000 feet

[3048 m]).

Compared to statistical multiplexors and leased-line

modems, the TDM (Time-Division Multiplexor) and line-driver

combination offers a couple of advantages for limited-

distance applications:

• Although SPM (Statistical Packet Multiplexing) is very

efficient, it’s also much more expensive than TDM.

If you have limited distances to carry data, the fixed

bandwidth used by TDMs gets you more for your money.

• Leased-line modems are not used between devices in

the same building or close to each other. To send data

a short distance over private, point-to-point fiber optic

cable systems, you’d typically use a line driver.

Synchronization between Asynchronous Local RS-232

Muxes is maintained continuously with no operator control

required. A Sync Loss indicator on the front of the unit alerts

you if loss of sync occurs.

These muxes automatically adapt port speeds to the rates

of the individual terminals, without requiring a clock source.

All ports operate at maximum throughput levels with virtually

no multiplexing delay. As DTE speeds vary, high-speed

data sampling on each port makes the unit transparent to

error control, EIA signal propagation, or flow control.

16-Port Fiber Optic Mux

(38892-R2)

Async Host

PCs

16-Port Fiber Optic Mux

(38892-R2)

PCs

3 of 3

6/7/2007

#22505

724-746-5500 blackbox.com

TECH SPECS

Maximum Distance — 10,000 ft. (3048 m) over duplex multimode fiber

Multiplexing Technique — Time-division

Operation — Full duplex

Protocol — Async

Speed — 38892-R2, 38890-R2: 19.2 kbps;

38888-R2: 64 kbps

Interface — Channel: RS-232;

Composite: Dual ST®

Connectors — Composite: All: (2) ST;

Channel: 38888-R2: (4) RJ-45;

38890-R2: (8) RJ-45;

38892-R2: (16) RJ-45

Indicators — (3) LEDs: Power, Composite Data, Sync Loss

Power — 115-VAC, 60-Hz external power supply

Size — 38888-R2, 38890-R2: 1.7"H x 7"W x 5.3"D (4.3 x 17.8 x 13.5 cm);

38892-R2: 2.2"H x 7"W x 5.3"D (5.6 x 17.8 x 13.5 cm)

Weight — 38888-R2, 38890-R2: 2 lb. (0.9 kg);

38892-R2: 2.5 lb. (1.1 kg)

Item Code

Async Local Fiber Optic RS-232 Multiplexor

4-Port 38888-R2

8-Port 38890-R2

16-Port 38892-R2

Optional accessories include…

Telephone Bulk Cable EL08A

Fiber Optic Duplex Bulk Cable EXN062A

Modular Adapters

DB25 Male/RJ-45 for DTE 523951

DB9 Female/RJ-45 for DTE 523953

DB25 Female/RJ-45 for DTE 523954

DB25 Male/RJ-45 for DCE 523952

Time-division multiplexing.

TDM operates by dividing the available bandwidth into

fixed-duration segments. Each segment or channel is assigned

to a user and is given its own time slot to access the network.

First, information from Channel A is transmitted, then

information from Channel B, and so on in a regular sequence,

continually cycling back to Channel A. Bandwidth allocation is

static: Each channel receives a fixed amount of bandwidth,

preset by the network administrator.

TDM is a relatively inexpensive multiplexing technique and

is simple to implement, so it has typically been the first

multiplexing technique applied to any new high-speed

bandwidth service at first offerings. TDM introduces very little

signal delay, so it’s well suited to transport data, voice, and

video traffic, provided enough bandwidth is available.

The figure on page 2 shows a mux merging 16 data

channels over dual fiber optic cable. Each data channel can

achieve speeds of up to 19.2 kbps with the 38892-R2 or 38890-

R2, 64 kbps with the 38888-R2.

Technically Speaking

38892-R2

Why choose fiber?

Fiber optic cable offers several clear advantages over

twisted-pair:

• Using fiber completely eliminates the potential for

ground loops and electrical problems like crosstalk

(interference from an adjacent communication

channel).

• With fiber you also get more bandwidth and speed, as

well as longer distances, which means more data goes

farther faster.

Technically Speaking

Dieses Handbuch passt für folgende Modelle

Andere Black Box Netzwerk-Hardware Handbücher

Black Box

Black Box ACR2004A Bedienungsanleitung

Black Box

Black Box JPM804A-R2 Bedienungsanleitung

Black Box

Black Box LB510A Bedienungsanleitung

Black Box

Black Box TL572A Bedienungsanleitung

Black Box

Black Box JPM440A Bedienungsanleitung

Black Box

Black Box ServSwitch KV1081A Bedienungsanleitung

Black Box

Black Box LrA502A-et-r5 Bedienungsanleitung

Black Box

Black Box LES1604A Bedienungsanleitung

Black Box

Black Box 38891 Bedienungsanleitung

Black Box

Black Box MX550A Bedienungsanleitung

Black Box

Black Box Palm-Sized Ethernet Switch Express 8-Port... Bedienungsanleitung

Black Box

Black Box EME1DC16 Bedienungsanleitung

Black Box

Black Box JPM260 Bedienungsanleitung

Black Box

Black Box AC1060A Bedienungsanleitung

Black Box

Black Box TL482A-R3 Bedienungsanleitung

Black Box

Black Box Secure Site Manager 8 Bedienungsanleitung

Black Box

Black Box AC431A Bedienungsanleitung

Black Box

Black Box ME0005A-10BT Bedienungsanleitung

Black Box

Black Box Veri-NAC LVN5600A Bedienungsanleitung

Black Box

Black Box IC457A-F Bedienungsanleitung

Black Box

Black Box MT330A Bedienungsanleitung

Black Box

Black Box FT990A Bedienungsanleitung

Black Box

Black Box FOM Line Driver-ST Bedienungsanleitung

Black Box

Black Box LB410A Bedienungsanleitung

Beliebte Netzwerk-Hardware Handbücher anderer Marken

Matrix Switch Corporation

Matrix Switch Corporation MSC-HD161DEL Bedienungsanleitung

B&B Electronics

B&B Electronics ZXT9-IO-222R2 Bedienungsanleitung

Yudor

Yudor YDS-16 Bedienungsanleitung

D-Link

D-Link ShareCenter DNS-320L Bedienungsanleitung

Samsung

Samsung ES1642dc Gebrauchsanweisung

Honeywell Home

Honeywell Home LTEM-PV Montageanleitung

evertz

evertz 7700 Series Bedienungsanleitung

D-Link

D-Link ShareCenter DNS-343 Bedienungsanleitung

Asante

Asante AsanteBridge 1012 Bedienungsanleitung

FireBrick

FireBrick FB2700 Bedienungsanleitung

Audiovox Electronics

Audiovox Electronics ARWH2T Bedienungsanleitung

ADC

ADC DSX-1 Handbuch

NetComm

NetComm NF2 Bedienungsanleitung

Alcatel-Lucent

Alcatel-Lucent 5620 Bedienungsanleitung

Dell EMC

Dell EMC XC6420 Series Bedienungsanleitung

Lanner

Lanner NCA-1020A Bedienungsanleitung

Allied Telesis

Allied Telesis AT-TN121-A Bedienungsanleitung

Arista

Arista CCA-ETM-Q12 Bedienungsanleitung