Most popular SIP phones 
How to connect Grandstream phones to Sonetel
Grandstream is a popular 3rd party SIP phone manufacturer with many different phones that can be connected to Sonetel for making and receiving calls.
Here are the instructions for how to connect a Grandstream phone to Sonetel.
General settings
Go to ACCOUNTS > General Settings under Account 1 and enter the details as shown below.
Network settings
Go to ACCOUNTS > Network Settings under Account 1 and enter the details as shown below.
Basic settings
Go to ACCOUNTS > SIP Settings > Basic Settings under Account 1 and enter the details as shown below.
Audio settings
Go to ACCOUNTS > SIP Settings > Audio Settings under Account 1 and enter the details as shown below.
General settings
Go to SETTINGS > General Settings and enter the details as shown below.
The screenshots and configuration instructions are based on the user interface provided by Grandstream GXP2160. All models we have tested have the same interface.
Our support does not include help with SIP phones. We can however assist you for a small extra fee.