Appendix A
IP 705 Manual 37
IP phone registered then
goes back to Basic mode •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 705 phone’s IP address.
•Ask the system administrator to check the
extension’s IP address in AltiWare Administrator 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.
No IP Address •Check if DHCP is enabled. If YES, check network
connection. If NO, verify that your DHCP server is
correctly configured.
•Check if IP 705 phone’s IP address is configured.
One way connection •Make sure firewall setting has all the TCP/UDP
ports required by AltiWare opened. See your system
administrator.
•If NAT is used, make sure NAT is enabled and NAT
address is set up correctly.
Phone does not show
anything on LCD display •Check the power source to be sure the IP 705 phone
is receiving power.
Poor voice quality •A Layer 3 Managed Ethernet switch should be used,
rather than a hub or non-managed switch, in the
corporate LAN. Check with your system
administrator.
•G.711 provides better voice quality. Check with
your system administrator.
•If VoIP is set up over WAN, priority queuing should
be set on the WAN router.
•System administrator should make sure WAN QoS
is okay by pinging a few hundred packets from a
remote site and observing packet loss and network
latency.
•System administrator should adjust jitter buffer to
accommodate network latency.