SIP Trunking
Connect your existing PBX or contact center to the world over elastic SIP trunks — scale channels on demand with per-second billing.
- no caps
- channels
- 190+
- countries
- opus
- HD codecs
curl -X POST https://api.conversa.in/v1/sip/trunks \
-H "Authorization: Bearer $API_KEY" \
-d name="hq-trunk" \
-d origination="sip:pbx.yourco.com" \
-d codecs="opus,pcmu"Everything you need to ship SIP Trunking
Elastic capacity
No channel caps — scale concurrent calls up and down automatically.
Bring your own PBX
Works with Asterisk, FreeSWITCH, and any standards-based SIP system.
Global termination
Least-cost routing to 190+ countries with high-quality codecs.
Per-second billing
Pay for what you use with no per-channel line rental.
Built for how you use SIP Trunking
- PBX modernization
- Contact center trunks
- DID origination
- Global expansion
SLA
opus
HD codecs
Enterprise-grade reliability with 24/7 support, dedicated routing, and transparent status reporting.
Common questions
Does it work with my PBX?
Yes — any standards-based SIP PBX or SBC connects with IP or credential auth.
How is it billed?
Per second of usage plus number rental — no fixed channel fees.
More Voice products
Every Conversa product shares the same API, dashboard, and billing.
Ready to launch SIP Trunking?
Get API keys in minutes. Pay only for what you use.