Grandstream Networks UCM6510 User Manual page 334

Username Configure the Username for API Authentication.
Password Configure the Password for API Authentication.
Permitted Specify a list of IP addresses permitted by API. This creates an IP-specific access
control list. Multiple entries are allowed.
For example, "192.168.5.20/255.255.255.255" denies access from all IP addresses
except 192.168.5.20
The default setting is blank, meaning all IPs will be denied. Users must set permitted
IP address before connecting to the API.
For more details on CDR API (Access to Call Detail Records) and REC API (Access to Call Recording
Files), please refer the document in the link here:
http://www.grandstream.com/sites/default/files/Resources/ucm61xx_cdr_rec_api_guide.pdf
UCM6510 IP PBX User Manual
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