Grandstream version GXP VoIP phone settings
1. Enter phone web-interface and open tab Accounts - Account 1 - General Settings
Account Active: Yes
Account Name: Your SIP login (for example 111111) from the personal account
SIP Server: sip.zadarma.com
SIP User ID: Your SIP login (for example 111111) from the personal account
SIP Authentication ID: Your SIP login (for example 111111) from the personal account
SIP Authentication Password: Your SIP login password from the personal account
Name: Your SIP login (for example 111111) from the personal account
Account Name: Your PBX extension number (for example 1234-100) from the personal account
SIP Server: pbx.zadarma.com
SIP User ID: Your PBX extension number (for example 1234-100) from the personal account
SIP Authentication ID: Your PBX extension number (for example 1234-100) from the personal account
SIP Authentication Password: Your PBX extension number password from the personal account
Name: Your PBX extension number (for example 1234-100) from the personal account
Save and Apply
BLF settings
In the Web interface go to Settings - Programmable Keys - Virtual Multi-Purpose Keys or Physical Multi-Purpose Keys (depending on the device model).
Tab Virtual Multi-Purpose Keys: click Add VPK , Mode enter BLF, Accounts choose your Zadarma PBX account on the phone, Description and Value set to 1234-100.
Physical Multi-Purpose Keys setttings are performed in the same way as Virtual Multi-Purpose Keys.