Polycom 650 IP Phone User Guide V1.0 
Troubleshooting guide 
We'll always aim to give you the best service possible. However, no system can be guaranteed to 
run error-free all the time. Here are a few issues that may arise - and how you can solve them.   
The handset shows an on-screen extension, but is also showing an amber light on 
the line key. 
This means it's successfully downloaded its configuration but hasn't been registered on Horizon. 
It's normally a local fault, where our IP traffic is being restricted in reaching our Session Boarder 
Controller. In a case like this, please check the following before raising a fault: 
-  Ensure  all  router  port  settings  -  as  defined  earlier  in  this  document  -  have  been 
implemented. Check the setting especially on port 5060 and make sure that SIP ALG is 
disabled. 
-  Eliminate LAN variables, ideally by plugging the handset directly into the router. If your 
router does not provide power over Ethernet, make sure the only thing between the router 
and the handset is the Power Over Ethernet switch and that all the wires and units are 
working correctly. 
-  Make sure the handset is still assigned to a user on the Horizon Portal. 
-  Plug the handset into a different port that you know definitely works. 
If none of these solve the issue, call our support team - contact details are in the following section. 
The handset boots up, but displays an amber light on the line keys and no on-
screen extension  
This means it's either been provisioned incorrectly, or it can't gain a connection to the public internet. 
Try the following checks: 
-  Ensure  all  router  port  settings  -  as  defined  earlier  in  this  document  -  have  been 
implemented. Check the setting especially on port 5060 and make sure that SIP ALG is 
disabled. 
-  Check you've assigned a local IP address, by looking it up on the routers ARP cache or 
similar. 
-  Eliminate LAN variables, ideally by plugging the handset directly into the router. If your 
router does not provide power over Ethernet, make sure the only thing between the router 
and the handset is the Power Over Ethernet switch and that all the wires and units are 
working correctly. 
-  Make sure the handset is still assigned to a user on the Horizon Portal. 
-  Plug the handset into a different port that you know definitely works. 
If you think the handset hasn't been configured properly, call our support team for more help. 
The handset displays an "Initialising Network" message constantly 
This means the handset can't connect to the local network. Before raising a fault, try the following: 
-  Check the connection from the handset to the router/switch, to ensure it's receiving a signal. 
-  Swap out Cat 5 cables and check ports, as well as connections on all wires. 
-  Plug the handset into a different port that you know definitely works.