Datacomm Fourpak Enclosure Installation; Datacomm Modem Shelf Installation; Gdc Tripak Shelf Installation; Universal System Shelf Installation - General DataComm 551 Operating And Installation Instructions

Intelligent channel service unit

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This unit incorporates an internal fusible link, FL1

(illustrated in Figure 2-1), which may be opened if the

ground potential between the unit and peripheral

equipment exceeds 0.25 V rms. Do not apply power to

the unit until all connections to the peripheral equip-

ment have been made. If the fusible link is opened, re-

turn the unit for repair.

The Telco continuously monitors the T1 link and the

equipment connected to it. Before

DataComm 551 to the network, or disconnecting it, the

Telco should be notified.

DataComm Enclosure Installation

The DataComm Enclosure is equipped with a captive ac power cord ter-

minated in a molded three-prong plug. Plug the cord into a polarized out-

let providing the required ac power.

DataComm FourPak Enclosure Installation

The DataComm FourPak Enclosure is equipped with a captive ac power

cord terminated in a molded three-prong plug. Plug the cord into a polar-

ized outlet providing the required ac power.

Refer to the appropriate Instruction Manual for details.

Refer to the Instruction Manual for details.

Refer to the appropriate Instruction Manual for details.

CAUTION

NOTE

connecting the

INSTALLATION

2-27

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