Polycom DOC2557A - Manual (Page 19)

Polycom RMX 1500 Hardware Guide
1-15
ISDN/PSTN Clock Source
Each RTM ISDN 1500 has its own primary and secondary clock source.
The first span to synchronize becomes the primary clock source and the
second span to synchronize becomes the secondary clock source. This
clock is used to synchronize ISDN spans only (it is not the system clock).
A single clock source triggers an alarm that can be turned off by setting
the appropriate flag in the system configuration.
RMX 1500 Power Supply
Subject to availability on the RMX 1500 there are two types of power
supplies (Power-One & Astec), both are identical in their functionality.
Power Supply LEDs
On the RMX 1500 there are three LEDs that indicate the power status.
Table 1-6 Polycom RMX 1500 Power Supply LEDs
Power Supply LED Description
OK DC power indication to internal components of the RMX:
Green - DC Power Good.
(Alarm symbol)
Power supply failure Indication:
Amber - Power Supply Failure.
AC/~ (symbol) Main power supply indication (Voltage In):
Green - Voltage Input > 85 VAC.