i have toll free number purchase from the websites the number is 18888681867 i mkae call foerarding our sip ip call land our server get error on console unable to request "tollfreeforwarding 1254859@iplike"
TollFreeForwarding WEbsite give below suggestion

To forward calls to a SIP device, you would provide a SIP address instead of a forwarding phone number. A SIP address looks like an email address, a few examples are 8885551212@,

i gave my ip
but what about 8885551212 is any user or shall i give anything else or any specific number?



and create an extension as 18888681867

Hope this helps you somewhere