Cloud PBX
Open for JustCall
Forward a JustCall IVR branch, ring group, or overflow rule to Open and the AI picks up — JustCall keeps owning the rest of your phone system.
- Setup time
- Under 15 minutes
- Auth
- PSTN forward + JustCall API key
- Directions
- Inbound · Call transfer
- Pricing
- Included with Open
01 — Overview
Can I add an AI phone agent to JustCall?
Yes — via call forwarding from an IVR branch or overflow rule to a number Open provides. JustCall keeps owning users, numbers, and the dashboard; AI takes the calls you opt-in to.
JustCall is a closed cloud phone system — there's no externally exposed SIP. The integration pattern is forwarding: in your IVR (or via team overflow / after-hours rules) you forward specific calls to an external phone number that Open answers. JustCall stays in charge of users, numbers, dialer, and the dashboard.
Practically, you provision an Open inbound number, then add it as a forwarding destination in JustCall. The IVR can pass the original caller's number through so the AI knows who it's talking to. Only the specific calls you've routed to AI take the detour; the rest keep flowing to your JustCall team unchanged.
What the AI does on the call: it greets, listens, reasons over your knowledge base and the tools you've connected (HubSpot, Salesforce, Pipedrive, Zendesk — plus the JustCall API for contact lookups), and acts. When the AI needs a human, it warm-transfers back to your JustCall team via PSTN bridge with the live transcript and detected intent attached.
JustCall's analytics keep working for the legs JustCall handled. Open adds AI-side reasoning traces, transcripts, and outcome tags on its side, so you can compare resolution rate and AHT between human and AI.
Billing stays predictable. JustCall continues to invoice your seats and the minutes for the legs it handles. Open charges per resolved conversation, no markup, no extra JustCall seats.
What stays the same on JustCall
JustCall users and dashboard
Seats, teams, dialers don't change.
Numbers and IVR
Numbers stay on JustCall. IVR still owns the routing tree.
JustCall integrations
CRM and helpdesk integrations keep working for human-handled calls.
Reporting
JustCall analytics continue for legs JustCall answered.
What's new with Open
A forwarding destination
Specific IVR branches or overflow rules forward to an Open-provided number.
AI handles those legs
Open answers the forwarded leg and runs the conversation.
Transfers come back via PSTN
AI bridges to a number that routes back to JustCall with transcript context.
Pricing model
Open per resolved conversation. JustCall keeps invoicing legs it answers.
02 — Why this works
The native JustCall experience
Works with JustCall's closed model
No SIP wrangling — the integration uses JustCall's own IVR forwarding.
Per-IVR branch opt-in
Pick exactly which IVR options or overflow rules get AI.
AI knows the caller via JustCall API
Open looks up the caller in JustCall to greet returning customers by name.
Warm transfer back to JustCall reps
AI escalations come back into JustCall with transcript context.
03 — Setup guide
Wire up JustCall in under 15 minutes
Two trunks — one inbound, one outbound. Both configurable from Settings → SIP in the Open dashboard.
- 1
Open Settings → Phone Numbers
Provision or attach an inbound number Open will own.
- 2
Connect JustCall via API key
In Open: Settings → Integrations → JustCall. Paste your JustCall API key/secret.
- 3
Pick the IVR target
Decide which IVR branch or overflow rule should forward to AI.
- 4
Add Open’s number as a forwarding destination
In JustCall: IVR / Number → Routing → Forward to External Number → enter Open's inbound number.
- 5
Pass the caller-ID through
Enable caller-ID forwarding on the JustCall side so Open sees the real caller.
- 6
Assign the number to an AI agent
In Channels → Phone → Agents, assign the Open inbound number to the AI agent.
- 7
Place a test call
Dial the JustCall number, take the AI path, and confirm Open picks up.
04 — Configuration
Settings → SIP, at a glance
A real inbound trunk for JustCall looks something like this. Yours are generated when you open Settings → SIP.
Forwarding rule · JustCall
Sample
- Inbound (Open)
- +1 (212) 555-0199Open-owned
- JustCall target
- IVR branch / Overflow
- Forward to
- +1 (212) 555-0199
- Pass caller-ID
- Yesenable on JustCall
- JustCall API
- API key + secret
05 — Security
Encrypted, audited, refundable
SIP over TLS for signaling, SRTP for media. Every call is logged with full reasoning traces. SOC 2 Type II, GDPR-aligned, HIPAA- and PCI-ready. Backed by the Open $2M Refund Guarantee.
06 — FAQ
