Issue 1.0
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
26
Table 4 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
Windstream
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
SIP Trunking Service Configuration Guide
Windstream