Black Box SM720C Manuale utente

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SEPTEMBER 2000

SM720C

SM721C

SM722C

SM723C

SM724C

Rear Interface Switch Cards

CUSTOMER SUPPORT INFORMATION

Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)

FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746

Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

2

REAR INTERFACE SWITCH CARDS

Specifications

Connectors — SM720C: (3) DB25 female; SM721C:

(3) M/34 female; SM722C: (3) DB15 female; SM723C:

(3) RJ-11; SM724C: (3) RJ-45

Leads Supported — SM720C: 25; SM721C: 34; SM722C:

15; SM723C: 6; SM724C: 8

Power — From the rack chassis

Size — 1⁄4-size card

Weight — 1 lb. (0.5 kg)

3

REAR INTERFACE SWITCH CARDS

Description

Rear cards work with front cards to manage lines. The

front card contains the switching and patching circuitry;

the rear card contains the cable interface circuitry. The

front card and the rear card mate when they are

inserted into a rack (see the illustration below).

Rear cards and front cards that mate must be

compatible.

In a rack, there are 16 slots for front cards, and 16

corresponding slots for rear cards. The cards occupy

one slot.

Rear cards have ports that correspond to their

applications. They also have a slot number window that

Front card Rear card

4

REAR INTERFACE SWITCH CARDS

indicates the number of the slot in which the card is

installed.

Rear cards available include:

Model Application # of Slots Connectors

SM720C A/B switch (and patch) 1 A, B, Common: DB25F

SM721C A/B switch (and patch) 1 A, B, Common: V.35F

SM722C A/B switch (and patch) 1 A, B, Common: DB15F

SM723C A/B switch 1 A, B, Common: RJ-11

SM724C A/B switch 1 A, B, Common: RJ-45

Each card comes with 2 screws and this users’ manual.

5

REAR INTERFACE SWITCH CARDS

Installation

To Install a Rear Card:

1. First, you’ll need to insert the corresponding front

card and tighten the screws. You don’t need to fill all

slots in a rack or fill slots in any particular order.

2. Insert the rear card and tighten the screws.

To Replace a Rear Card:

1. Unscrew the mounting screws.

2. Slide the card out of the rack and install a

replacement.

CAUTION

Electrostatic Discharge (ESD): Cards are ESD-sensitive. To

prevent ESD damage, always wear grounding wrist straps

when touching, removing, or inserting cards. Store and

transport cards in sealed static-shielding containers.

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746

© Copyright 2002. Black Box Corporation. All rights reserved.