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1.0  WARRANTY INFORMATION 

Patton Electronics warrants all Model 552 components to be free

from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of shipment.

This warranty is limited to defects in workmanship or materials, and

does not cover customer damage, abuse or unauthorized modification.
If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above.  Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product.  These damages include, but are not limited
to, the following:  lost profits, lost savings and incidental or
consequential damages arising from the use of or inability to use this
product.  Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user. 

1.1  SERVICE

All warranty and non-warranty repairs must be returned freight

prepaid and insured to Patton Electronics.  All returns must have a
Return Materials Authorization number on the outside of the shipping
container.  This number may be obtained from Patton Electronics
Technical Service at: (301) 975-1007http://www.patton.com; or,
[email protected].

NOTE:  Packages received without an RMA number will not be 
accepted.

Patton Electronics' technical staff is also available to answer any

questions about the installation or use of your Model 552.  Technical
Service hours are:  8AM to 5PM EST, Monday through Friday.

1.2  CE NOTICE

The CE symbol on your Patton Electronics equipment indicates

that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU).  A Certificate of Compliance is available by contacting Technical
Support.

2.0  GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor.  If you have any questions
while installing or using this product, please do not hesitate to contact
Patton Electronics Technical Support at (301) 975-1007. 

2.1  FEATURES

Uses a multi-stage hybrid circuit for the best possible protection

Handles surge energy up to 1.5 kW 

Conforms to the UL497A telco specification (except E1 versions) 

Available for ISDN-U (8-wire), ISDN-ST (4-wire), T1, E1, ISDN
PRI, DDS, leased line and dial up configurations

Diverts surges directly to chassis ground through braided metal
ground strap

Equipped with two RJ-45 jacks or four BNC connectors

Easy to install

Made in the U.S.A.

2.2  DESCRIPTION

The potential threats to ISDN and Telco hardware are vast:

lightning, AC power induction, electrostatic discharge, ground potential
differences, EMI/RFI interference and more.  The Patton Model 552 has
been designed to greatly reduce these risks.  Just attach one unit to
each of your telco ports and rest easy.

The Model 552 connects directly between twisted pair telco cables

and their respective I/O ports.  Grounding is accomplished using an
external ground strap that provides a separate unit-ground to chassis-
ground connection.  By shunting threatening voltages directly to chassis
ground, the Model 552 insures data integrity and protects connected
equipment from damage.  

The Model 552 uses a solid state design and sophisticated

multistage hybrid circuits to achieve maximum protection without
performance loss.  Eight versions are available:  Model 552-ST, 552-
D8, and 552-L8 protect all 8 pins; Model 552-D6 protects six pins;
Models 552-DDS, 552-D4,  552-U, 552-L4, 552-E1, 552-E1 CX, and
552-T1 protect  four pins;  and, Model 552-D2 protects two pins.    All
versions provide up to 1500 Watts of data line protection.

NOTE:  Model 552-L8 may be used to protect Leased Line, DDS,
T1, E1, ISDN PRI, and ISDN BRI “U” and “ST” interfaces.

WARNING!:  This product will not provide complete protection
should your equipment or building be subject to a direct lightning hit.

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