Yeastar

How Voice Logica connects

The Yeastar registers a SIP trunk to Voice Logica (way 1), the same way it registers to a phone provider. Voice Logica creates the trunk and gives you a server, a username and a password; the PBX connects out, so no port forwarding is needed.

• Calls the PBX sends to this trunk are answered by the AI agent.
• The agent transfers callers back over the same trunk, and the PBX rings the extension through an inbound route.

1. Create the connection in Voice Logica

Telephony - Trunks - Connect your PBX, pick Yeastar P-Series or Yeastar S-Series and the agent. Keep the dialog open until it says Connected.

2. Add the trunk, routes and transfers

P-Series

1. Extension and Trunk → Trunk → Add. Name Voice Logica, Trunk Status Enabled, ITSP Template General.
2. Trunk Type = Register Trunk. Transport UDP, Hostname/IP = the server, Port 5060, Domain = the server.
3. Username and Authentication Name = the username, Password = the password.
4. Advanced → Codec Setting: G.711 A-law first, then u-law. Advanced → VoIP Setting → DTMF Mode = RFC4733 (RFC2833), Qualify on.
5. Save and Apply. The trunk list shows the registration status.

Send calls to the agent: Call Control → Outbound Route → Add, a dial pattern (for example a short code) with the Voice Logica trunk, or send an IVR option, a queue’s failover or after-hours calls to it.

Transfers back: Call Control → Inbound Route → Add, Trunk = Voice Logica, DID Pattern matching your extensions, destination the extensions.

S-Series

1. Settings → PBX → Trunks → Add, type Register Trunk (VoIP).
2. Transport UDP, Hostname/IP = the server, Port 5060, Domain = the server.
3. Username and Authentication Name = the username, Password = the password.
4. Advanced: DTMF Mode RFC2833, Qualify on. Codecs: G.711 A-law, then u-law.
5. Save and Apply. Check the trunk in PBX Monitor.

Send calls to the agent: Settings → PBX → Call Control → Outbound Routes with the Voice Logica trunk, or an IVR option pointing at it.

Transfers back: Settings → PBX → Call Control → Inbound Routes, Member Trunks = Voice Logica, destination your extensions.

Then, in Voice Logica, add the extensions as transfer destinations on the agent: an External destination with the extension number (for example 201), or a User with that extension. Use Warm transfer, so the agent comes back and takes a message when nobody answers.

3. Check it works

• The dialog says Connected; the trunk’s SIP logs in Voice Logica show each REGISTER and our reply.
• Call the route from an extension: the call appears in Calls.
• Ask the agent for a colleague: the extension rings.

Good to know

• The Yeastar firewall blocks SIP from outside the PBX’s own subnet by default. The trunk registers out, so it is not affected, but an edge device on another subnet must be allowed in the PBX firewall.
• Turn off SIP ALG on the office router.
• A Warm transfer uses two trunk channels until it connects.