Multitech MVP 400, MVP 4-8 Service Manual

4-Channel Voice/Fax Product Update
Part Number: 82087900
5/28/99

Introduction

This product update provides the information necessary to perform a 4-channel voice/fax field upgrade to your
MultiVOIP. For example, a MultiVOIP MVP400 can be upgraded to an MVP800 by following the installation
instructions provided below.

Installation

T o install the 4-Channel V oice/Fax upgrade kit:

1. Check the contents of your upgrade kit to insure that it contains the parts listed below:

• 4-Channel Voice/Fax logic board

• Phillips screws (6)

• 4-Channel Voice/Fax Product Update

2. Turn the power switch to OFF and unplug the power cord from the wall outlet.

3. Turn the unit up-side-down and remove the eight screws (four on the bottom and four on the rear)
securing the cover to the chassis.

4. Slide the cover towards the back and off the chassis. Set aside.

Cover

Rear Mounting
Screws (4)

Mounting
Screws (4)

Figure 1: Removing the Cover

5. Remove the three screws and the Voice/Fax Cover which covers expansion slots 5 to 8 (CHANNEL 5
to 8) on the back panel of the unit (Refer to Figure 2). Discard the cover plate and the screws.

4-Channel Voice/Fax Board

Mother Board

Logic Board Standoffs
(3 in front and 3 in back)

Mounting Screws (3)

Four-Position
Dip Switch

Voice/Fax Cover

Figure 2: Back View with Cover Removed

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6. Connect the ribbon cable from the existing 4-channel board to the 50-pin connector on the 4-Channel
Voice/Fax logic board.

7. Place the 4-Channel Voice/Fax logic board in the CHANNEL 5 through 8 slots in the back panel of the
unit and onto the six metal standoffs (Refer to Figure 3).

8. Secure the 4-Channel Voice/Fax logic board to the metal standof fs using the 6 screws provided in the
kit.

4-Channel Voice/Fax Board

Screws
(3 in front and 3 in back)

Four-Position
Dip Switch

Expansion Slots (12)

Logic Board Standoffs
(3 in front and 3 in back)

Ribbon
Cable

Figure 3: Adding the 4-Channel Voice/Fax Board

9. Set switch 1 of the four-position dip switch to the up (open) position on the new 4-Channel Voice/Fax
logic board. All four dip switches must be in the down (closed) position on the existing V oice/Fax logic
board.

10. Slide the cover back on to the chassis and reinstall the cover screws.

11. Refer to your User's Guide to configure your 4-Channel Voice/Fax logic board.

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