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What is Acefone SIP trunking used for in a Bolna voice agent?
Acefone SIP trunking lets a Bolna voice agent answer calls on your Acefone numbers and place calls from them, with Acefone carrying and billing the minutes. Bolna has no native Acefone telephony integration and no Acefone preset, so you connect it as a Custom SIP trunk. Acefone's public docs don't describe its SIP trunk settings, so Acefone support configures their side with the values Bolna gives you.
How do I set up an Acefone SIP trunk with Bolna?
- Get these from Acefone support: a SIP trunk with at least one number, the host and port Bolna dials for outbound calls, the IPs Acefone sends calls from, and a SIP username and password if Acefone uses credentials.
- Send Acefone Bolna's values: inbound address
trunk.bolna.aion port5060, UDP or TCP (not TLS), codecsPCMUandPCMA, and signalling IPs15.252.21.46and13.206.230.198. - In the Bolna dashboard, under Deploy, open SIP Trunks and click Create trunk. Pick Custom and enter a trunk name and channels. If Acefone's port is
5060, enter the host in Gateway we dial. Otherwise leave it empty. - On the Carrier IPs step, add each IP Acefone sends calls from. Add the SIP username and password under Carrier credentials (optional) if Acefone issued them.
- Add your Acefone numbers in E.164 format, such as
+91XXXXXXXXXX, and click Create trunk. If you left the gateway empty, add Acefone's host and port on the Connection tab with priority1. - Assign an agent to each number on the Numbers tab for inbound calls. For outbound calls, set the agent's Telephony Provider to SIP Trunk and pick your Acefone number as the caller ID.
Every step is in the Acefone SIP trunk setup guide in the Bolna docs.
Which values does Acefone need from Bolna?
| Setting | Value |
|---|---|
| Inbound address | sip:trunk.bolna.ai:5060, or 15.252.21.46 port 5060 if only an IP is accepted |
| Transport | UDP or TCP on port 5060. TLS is not supported |
| Bolna IPs to allowlist | 15.252.21.46 and 13.206.230.198 |
| Audio (RTP) | UDP 30000 to 40000, to and from 15.252.21.46 |
| Codecs | PCMU and PCMA only |
| DTMF | RFC 2833 |
| Bolna preset | None. Use Custom |
What can you build with Acefone SIP and Bolna?
AI agents on your Acefone numbers. Your numbers stay with Acefone. Map each one to a Bolna agent on the trunk's Numbers tab, or set a default agent for numbers without their own.
Outbound calls from your own caller ID. A SIP Trunk agent always calls from one of your trunk numbers, single calls or batches, and Bolna queues calls when every channel is busy.
Caller details in the prompt. Every inbound call fills from_number, to_number and call_sid for the prompt, and Bolna passes P-Asserted-Identity, Diversion and custom X- headers you can map to variables.
Test before going live. The trunk's Activity tab places an echo call in each direction without an agent, so you can check Acefone's setup on its own.
For other carriers, see the generic SIP trunk page. For Bolna's AI pricing, see pricing.