Altigen IP 710 User Manual page 45

Image update failed. If
setting Boot Download
to Yes, after the phone
reboots and if the setting
still says Yes, the boot
failed.
IP phone registered then
goes back to Basic mode
No IP Address
One way connection
Phone does not show
anything on LCD display
Poor voice quality
•
Check the IP 710 phone's IP address, network,
default gateway settings.
•
Check the network connection.
•
Check the TFTP server IP address and make sure the
TFTP server is running.
•
PING from the TFTP server to the IP 710.
•
Check network connectivity by pinging from
AltiServ to the IP phone.
•
Check if IP Phone Service is running.
•
Check if there is a duplicate IP address by
unplugging the Ethernet cable on the IP phone, then
pinging the IP 710 phone's IP address.
•
Check the extension's IP address in AltiAdmin to
find out if another user is trying to log in using the
same extension number.
•
Use #27 then Enter to log in again and see if the
problem persists.
•
Check if DHCP is enabled. If YES, check network
connection. If NO, verify your DHCP server is
correctly configured.
•
Check if IP 710 phone's IP address is configured.
•
Make sure firewall setting has all the TCP/UDP
ports required by AltiWare opened.
•
If NAT is used, make sure NAT is enabled and NAT
address is set up correctly.
•
Check the power source to be sure the IP 710 phone
is receiving power.
•
Make sure a switch is used, rather than a hub, in the
corporate LAN.
•
G.711 provides better voice quality.
•
If VoIP is set up over WAN, set priority queuing on
the WAN router.
•
Make sure WAN QoS is okay by pinging a few
hundred packets from remote site and observe
packet loss and network latency.
•
Adjust jitter buffer to accommodate network
latency.
Appendix A
IP 710 Manual 37