User's Manual

Site preparation for User Alarm cables
User Alarm requirements
Each generated User Alarm is generated by a set of isolated dry relay contacts.
An “alarm state” may be indicated by a “closed circuit” or an “open circuit.”
• If an alarm condition is indicated by a “closed circuit,” the alarm contacts must
present a contact closure when the alarm circuit fails or loses power.
• If an alarm condition is indicated by an “open circuit,” the alarm contacts must
present an “open circuit” when the alarm circuit fails or loses power.
The resistance of a “closed circuit” is less than 100 ohms. The resistance of an “open
circuit” is greater than 1 megohm.
The User Alarm switches (if desired) must be installed as part of site preparation. The
9927 Distributed Base Station Outdoor Cabinet cabinet is equipped with primary surge
protection.
User Alarm cable connections
The table below provides the pin numbers, wire colors, and functions for the User Alarm
cables in the 9927 Distributed BTS outdoor cabinet.
Site preparation -- T1/E1 and User Alarm facilities for 9927
Distributed Base Station Outdoor Cabinet
Site preparation for User Alarm cables
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9927 Dist BTS Outdoor
401-703-516
Issue 1 March 2012
Alcatel-Lucent – Proprietary
Use pursuant to applicable agreements
14-9