Front Panel LEDs, LED Label Activity Description

Introduction

—Diffserv marking and policing

—Traffic shaping

—VoIP call admission control prevents oversubscription of priority queue

•Security

—Stateful packet inspection firewall

—VoIP aware firewall dynamically provisions and closes UDP ports used for VoIP calls

—IPSec: 3DES, SHA-1

—NAT/PAT server hides enterprise LAN topology

•Passive Call Quality Monitoring

—Per call statistics include mean opinion score (average and minimum), jitter, latency, packet loss and much more

—Alarms for poor MOS scores

—Active call count indicators

Front Panel LEDs

The LEDs display real-time information for key functions of the 4350. They are as follows:

	LED Label	Activity	Description

A	Power	Off	Power switch is off (or no power from the AC outlet)

		Green	Power is supplied to the unit

B	Status	Off	The unit could not boot up because of self test
			failure

		Green	Self test passed

		Flashing Green	Configuration is being written to permanent storage
			or an upgrade is in progress

C	T1	Off	The T1 is in an alarm state and not synchronized

		Green	T1 is in sync and no alarms are reported

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