Polycom 1725-31402-001 ユーザーズマニュアル

User Guide for the Polycom CX700 IP Phone

4 - 4

There is no response from key 
presses.

The Polycom CX700 IP phone is 
not in active state.

Do one of the following steps:

Press the keys more slowly.

Check with the system administrator 
to see whether or not the key has 
been mapped to a different function or 
disabled.

Make a call to the phone to check for 
inbound call display and ringing as 
normal. If successful, try to press 
feature keys within the call to access 
the Menu, for example.

Reboot the phone to attempt 
re-registration to the call server (refer 
to 

 on page 

).

The display shows “Cannot 
contact the server...” or “Cannot 
acquire IP address”. 

The LAN cable is not properly 
connected.

Do one of the following steps:

Check termination at the switch or hub 
(furthest end of the cable from the 
phone).

Check that the switch or hub is 
operational (flashing link/status lights) 
or contact your system administrator.

Reboot the phone to attempt 
re-registration to the call server (refer 
to 

 on page 

).

I cannot sign-in to the Polycom 
CX700 IP phone. I see the 
“Cannot connect to server or 
server name is incorrect" error.

The Polycom CX700 IP phone is 
not recognized by the server.

Do one of the following steps:

Validate your domain name is correct.

Ensure DHCP is configured to provide 
DNS address as part of DHCP 
response.

Ensure DNS has SRV records for SIP 
service.

Ensure SIP server is reachable from 
the Polycom CX700 LAN.

I cannot sign-in to the Polycom 
CX700 IP phone. I see the 
"Cannot validate server 
certificate" error.

The Polycom CX700 IP phone is 
not recognized by the server’s 
certificate.

Do one of the following steps:

Ensure either time.windows.com is 
accessible or NTP is configured with 
appropriate SRV records created in 
DNS.

Ensure PKI enrollment objects have 
been created on AD to point to CA or 
CA delegate.