Table 2 Troubleshooting Guide - NEC Univerge SV9300 Programming Manual

Issue
No Calls IN/Out
No Calls Out
No Calls In
One-Way Audio
Echo
Call Dropping
Static or HUM on Phones
Missing Parts of Words
SIP Trunk Programming Guide

Table 2 Troubleshooting Guide

Cause
Router Configuration

NEC Configuration

Unqualified IP Address

NEC Configuration

Unqualified IP Address

NEC Configuration

Unqualified IP Address

NEC Configuration

Excessive Delay

Echo Cancellation Issue

Internet Access Issues

Extreme Latency on LAN

SIP issue

Power issue

Packet Loss or Latency on LAN

Packet Loss or Latency on WAN

Jitter Buffer Configuration

Remedy
Check Router Configuration

Check NEC Configuration

Note WAN IP Address and Contact Provider

Check NEC Configuration

Note WAN IP Address and Contact Provider

Check NEC Configuration

Note WAN IP Address and Contact Provider

Check NEC Configuration

Check LAN and WAN for high latency

Check Echo settings and/or consult your

SIP trunk provider
Call Internet Access Provider

Check Latency on LAN

Contact Provider

Check power if using AC, should not be

issue in PoE
Check LAN

Check with Internet Access Provider

Check with NEC

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