I'm not using a digital receptionist. My test rig is normally two hard phones. I have a ring group (800) that, when an incoming call is coming in (GXW-4104), causes all three extensions to ring. That works great. As a test I figured I'd see if I can set things up so if that call doesn't get answered, the call is forwarded to my cell. So I set ring time for 800 to 3 seconds (arbitrary, I guess), and set "Distination if no answer" to "Forward to outside number," where i plug in a cell phone #. I've made sure that ext. 800 is included in the dialing rules. I've checked General Settings/Global and made sure "allow forwading to ext. numbers" is checked. When I call the system, though, it just keeps ringing (about fifteen seconds) until my non-test-phone-system voicemail picks up the line. Check of the server log and no mention of any attempt to transfer to the external #: ***** 11:51:35.838 [CM506001]: STUN request to resolve SIP external IPort mapping is sent to STUN server 18.104.22.168:3478 over Transport 192.168.1.131:5060 11:45:16.760 [CM503003]: Call(50): Call to sip:firstname.lastname@example.org:5060 has failed; Cause: 487 Request Terminated; from IP:192.168.1.46:5060 11:45:16.463 [CM503008]: Call(50): Call is terminated 11:45:14.088 [CM505001]: Ext.965: Device info: Device Identified: [Man: Aastra;Mod: 9133i;Rev: General] Capabilities:[reinvite, replaces, unable-no-sdp, recvonly] UserAgent: [Aastra 9133i/22.214.171.1241 Brcm Callctrl/126.96.36.199 MxSF/v188.8.131.52] PBX contact: [sip:email@example.com:5060] 11:45:14.088 [CM503002]: Call(50): Alerting sip:firstname.lastname@example.org:5060;transport=udp 11:45:13.854 [CM503025]: Call(50): Calling RingAll800:965Ext.965@[Dev:sip:email@example.com:5060;transport=udp] 11:45:13.822 [CM503004]: Call(50): Route 1: RingAll800:965Ext.965@[Dev:sip:firstname.lastname@example.org:5060;transport=udp] 11:45:13.822 [CM503010]: Making route(s) to <sip:email@example.com:5060> 11:45:13.807 [CM505002]: Gateway:[Grandstream] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Grandstream GXW4104 (HW 1.0, Ch:5) 184.108.40.206] PBX contact: [sip:firstname.lastname@example.org:5060] 11:45:13.807 [CM503001]: Call(50): Incoming call from unknown@(Ln.10003@Grandstream) to <sip:email@example.com:5060> 11:45:13.791 [CM503012]: Inbound office hours rule (unnamed) for 10003 forwards to DN:800 ***** You may note that in the log above I've dropped down to a single hard phone for testing this (to save noise). Does one need to use a Digital Receptionist in order for this type of call forwarding to work? That is, do I need the DR to answer the call and forward to 800 to have it forward to an ext. # if nobody answers at 800?