Cambium Networks PTP 820 Series, User Manual, Page: 56 / 1149

Chapter 1: Introduction Front Panel Description
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Page 1-10
The allowed power input range for the PTP 820F is -40V to -60V. An under voltage alarm is triggered if the power
goes below the allowed range, and an over voltage alarm is triggered if the power goes above the allowed range.
Synchronization Interface
PTP 820F includes an RJ-45 synchronization interface for T3 clock input and T4 clock output. The interface is the
lower RJ-45 interface in a pair of interfaces labeled MGMT/SYNC.
Terminal Interface
PTP 820F includes an RJ-45 terminal interface (RS-232). A local craft terminal can be connected to the terminal
interface for local CLI management of the unit.
External Alarms
PTP 820F includes a DB9 dry contact external alarms interface. The external alarms interface supports five input
alarms and a single output alarm.
The input alarms are configurable according to:
1 Intermediate
2 Critical
3 Major
4 Minor
5 Warning
The output alarm is configured according to predefined categories.
Storage Memory Card
Each PTP 820F unit includes a Storage Memory card (SM card). The SM card holds the configuration and software
for the IDU. The SM card is embedded in the SM card cover. In the event of IDU replacement, re-using the existing
SM card cover is necessary to ensure that the
unit’s software and configuration is maintained.
An SM card is pre-installed inside eachPTP 820F unit. It can also be ordered as a separate item (e.g., as a spare
unit).