How many lines/channels are you using? What are the internet options? You can always bring in pots and covert that to voip internal if really need be. I have also seen a service that you can have your pbx talk to using sip that in turn treats a cell phone over regular voice service as an extension.
What are your internet options. Did the previous owner try tuning to remove buffer bloat and QoS turned on for Voip?
How many lines/channels are you using? What are the internet options? You can always bring in pots and covert that to voip internal if really need be. I have also seen a service that you can have your pbx talk to using sip that in turn treats a cell phone over regular voice service as an extension.
What are your internet options. Did the previous owner try tuning to remove buffer bloat and QoS turned on for Voip?