Specification sheet · Voice & Wholesale Carrier Services
SIP Trunking
Enterprise and global SIP trunks that replace PRI and ISDN with elastic channels, encrypted signalling and media, and native integration with your PBX, Microsoft Teams or contact-centre platform.
Global SIP trunking with elastic channels, TLS/SRTP, E911 and emergency calling where mandated, and tested integration with leading PBX, UCaaS and CCaaS platforms.
- Countries served
- 110+
- Trunk availability SLA
- 99.99%
- P1 NOC response
- ≤ 15 min
At a glance
- Replace PRI / ISDN with IP trunks scaled from the portal
- Elastic channels; burst above commitment for peaks
- TLS signalling and SRTP media; IP or registration auth
- Microsoft Teams Direct Routing and PBX-vendor tested configs
- Numbers in 110+ countries on one trunk and one invoice
- E911 / 999 / 112 emergency routing with location data where mandated
- Per-trunk fraud caps, spend limits and destination controls
- 99.99% availability SLA with 24×7 NOC
Typical use cases
- 01PRI and ISDN replacement
- 02Microsoft Teams calling
- 03Contact-centre platforms
- 04Multi-country enterprises
- 05Managed service providers
Technical & commercial specifications
| Signalling | SIP (RFC 3261) over UDP/TCP/TLS 1.2+; IP or registration authentication |
|---|---|
| Media | RTP/SRTP; G.711a/u, G.729, G.722, Opus; DTMF RFC 2833/4733; T.38 |
| Channels | From 5 to 5,000+ per trunk; committed plus burst or fully usage-based |
| Numbers | Geographic, national, mobile, toll-free in 110+ countries; porting |
| Emergency | E911 (US), 999/112 (UK/EU) and local equivalents with location data |
| Platforms | Teams Direct Routing; major PBX, UCaaS, SBC and CCaaS platforms |
| PoPs | London, Frankfurt, Amsterdam, Ashburn, Mumbai, Singapore |
| Availability | 99.99% trunk availability SLA; geo-redundant SBCs |
| Controls | Spend caps, destination lists, velocity limits, CPS and channel caps |
| Support | 24×7 NOC; P1 response ≤ 15 min; named account manager |
Talk to Dollu about SIP Trunking
Send us your destinations, volumes, sites or use case and we will return a proposal, pricing and a technical plan within one business day. Test credentials and the full service description and SLA document are available on request.
- Sales
- [email protected]
- Phone
- +91 777-500-2222
- Web
- dollu.com
- NOC
- [email protected] · 24×7
Dollu Ltd · 2403A, Iconic Corenthum, Sector 62, Noida 201301, India. This sheet summarises the standard service; specifications may vary by country and are confirmed in the service order.
Online version: https://dollu.com/services/voice/sip-trunking
Contact: https://dollu.com/contact?service=sip-trunking