*67 2000 alaska android asterisk ata bandwidth beta billing blacklist block buffalo byod call call history cell cisco congestion connection domestic e-mail ekiga elastix email failover fax faxing fee fios forwarding freepbx grandstream gxp incoming calls international iphone latency limit mobile mobile app nat newbie ooma outgoing password pbx phonetray port problem qos secondary second line service settings setup sip skype sms softphone softphone byod software spam sucks traffic transfer udp voipo vpanel website whitelist