Answer incoming calls on your Bird phone numbers with a published IVR call sequence, your own PBX or SIP-connected AI voice agent, or a verified forwarding number for live staff. Set a workspace default route or per-number rules, fail over across backup SIP gateways when an endpoint is unreachable, and inspect the route and connection outcome recorded on each call.
Harbor Voice
Inbound routing
What happens when someone calls this number.
Route to your support team
We dial your phone system at the gateways on that trunk, in order.
Your PBX decides who answers.
Forward to an external number
We call one of your verified numbers and connect the two.
Track the incoming and forwarding legs separately.
Leave the number closed
The call will be rejected.
A number needs an explicit answer route before it receives calls.
Harbor Voice
Inbound routing
What happens when someone calls this number.
Route to your support team
We dial your phone system at the gateways on that trunk, in order.
Your PBX decides who answers.
Forward to an external number
We call one of your verified numbers and connect the two.
Track the incoming and forwarding legs separately.
Leave the number closed
The call will be rejected.
A number needs an explicit answer route before it receives calls.
Harbor Voice
Inbound routing
What happens when someone calls this number.
Route to your support team
We dial your phone system at the gateways on that trunk, in order.
Incoming call
+31 20 555 0188
Bird number
Route
Amsterdam trunk
Inbound enabled · gateway configured
Destination
pbx.harbor.example
Your phone system
Your PBX decides who answers.
Forward to an external number
We call one of your verified numbers and connect the two.
Incoming call
+31 20 555 0188
Bird number
Route
Verified destination
Forwarding destination verified
Destination
+44 20 7946 0188
Verified number
Track the incoming and forwarding legs separately.
Leave the number closed
The call will be rejected.
Incoming call
+31 20 555 0188
Bird number
Route
Reject
The call is rejected.
Destination
No destination
Default number behavior
A number needs an explicit answer route before it receives calls.
Change the number’s route to see where the call goes.
Assign individual numbers to IVR menus, SIP trunks, or forwarding numbers, and configure gateway failover so callers still connect when a server is busy or unreachable.
Point an inbound Bird number at a published call sequence for keypad menus, a SIP trunk for your PBX or AI voice agent, or a verified phone number for call forwarding. Numbers without a custom rule follow your workspace default route, which rejects calls cleanly until you are ready to open the line (external numbers verified as outbound caller IDs continue receiving calls on their existing carrier).
Keep incoming calls connecting when a SIP server is under maintenance or fails to answer. Assign gateway priorities or routing groups to distribute traffic across active endpoints and step through backup gateways in order, and format the dialed and calling numbers (such as E.164, without the leading plus, or with a custom prefix) to match your PBX dialplan.
Forward incoming calls to an on-call mobile or external support number and choose whether to display the customer's number or the Bird line they dialed. Bird links the arriving call and the forwarded outbound leg under one call ID and records the active route, SIP status, talk duration, and per-leg cost so you can see where a call connected or why it was refused.
Connect your SIP infrastructure, build interactive keypad menus, and inspect per-leg call outcomes.
Connect your PBX, contact center, or voice AI server over TLS with IP allowlists, digest auth, and gateway failover.
→Build spoken greetings, keypad menus, and routing branches in the visual editor, then test drafts before publishing.
→Inspect ringing time, billable talk duration, SIP response codes, and rejection reasons across inbound and forwarded legs.
→Organize teams in workspaces, control API access, and trace changes through audit logs.
Organization
Harbor
Access stays in its workspace.
Production/API keys
Voice agent
ActiveAlex Lee
Admin
Today · UTC
Audit log
Organization
Harbor
Access stays in its workspace.
Production/API keys
Voice agent
ActiveAlex Lee
Admin
Today · UTC
Audit log
Organization
Harbor
Access stays in its workspace.
Production/API keys
Voice agent
ActiveAlex Lee
Admin
Today · UTC
Audit log