Quick one for the SIP experts - if I get a SIP trunk, with say 4 sip lines from a voip provider - am I able to just have one number associated with my trunk, with essentially 4 channels available to that number? i.e. if the one channel was in use, an incoming call to the same number would automatically use the next available sip line?
Is this a feature of the provider, or the ip pbx, and if the provider is this something that happens by default with the sip standard or is it something certain providers may or may not implement?
Thanks for your help.