Don’t let one cable decide your business’s fate.
Secure your FREE Backup SIP Trunk today and safeguard your business operations with FirstNet.
- ↻ Instant failover
- ⬢ Carrier-grade reliability
- ★ Peace of mind
56%
of organisations experience SIP trunk downtime
82
hours
average outage time per year
R400
per minute average cost of telecom downtime
69%
admit they’re not prepared for SIP downtime
Apply for your FREE Backup SIP Trunk
Fill in the form and our team will provision a backup SIP trunk for instant failover. No cost for connectivity customers.
QuickStart — Yeastar
FirstNet is a supported SIP provider on Yeastar. On P‑Series/S‑Series you can select FirstNet from the ITSP/Service Provider list. If your system doesn’t show it, use the manual trunk settings below.
Using the Service Provider Template (Recommended)
- On Yeastar: VoIP Trunks → Add → Service Provider.
- Select FirstNet from the provider list.
- Enter the credentials we email you (Trunk Username / Authentication Name / Password).
- Save & Apply. The trunk status should turn Registered.
- Routing: create an Outbound Route (choose this trunk) and an Inbound Route (map DID to a destination).
Manual Trunk (If FirstNet isn’t listed)
- SIP Server (Registrar)
sip.firstnet.co.za - Port
5060(UDP/TCP) - Outbound Proxy
sip.firstnet.co.za:5060 - TransportUDP (or TCP if preferred)
- Trunk UsernameAs provided
- Authentication NameAs provided
- PasswordAs provided
- CodecsG.711a/u, G.729; enable Opus if supported
- DTMFRFC2833
- NAT Keep-AliveEnabled (20–30s)
If behind a strict firewall, allow outbound to the SIP server/port above and the RTP media range specified in your provisioning email.
PBX Interop Notes
- 3CX: Add SIP trunk → choose FirstNet/generic; set registrar to
sip.firstnet.co.za. - FreePBX: Add Trunk → SIP settings → host=sip.firstnet.co.za, type=peer, fromdomain=sip.firstnet.co.za.
- Microsoft Teams (Direct Routing): Use your SBC; point to FirstNet as the external trunk.
Questions?
Email Sales@FirstNet.co.za or call 0861 989 896.