Products and Bundles
Numbers/Additional Services
Core Infrastructure Products
Call rates
- National & local 1p/min per call RRP
- Mobile blended rate 9p/min per call RRP
- Buy rates will differ depending on service selected.
SIP Trunks and Telephone Numbers
A SIP Trunk is a facility provided by Voiceflex that allows the placing of out-bound calls and the receiving of inbound calls using an internet connection, rather than using an ISDN line. Calls to and from the PSTN are supported.
SIP Trunks are fast becoming the standard technology that allows businesses to make and receive telephone calls without the need for an expensive ISDN circuit. The Quality of Service has contributed to its increasingly widespread adoption.
The background
Session Initiation Protocol (SIP) is used to set-up and ‘tear-down’ telephone calls over IP networks, including the internet. It is this VoIP protocol that is most widely supported by modern devices, including IP-enabled PBXs.
A SIP Trunk is a facility provided by Voiceflex which allows the placing of outbound calls and the receiving of inbound calls using an internet connection instead of an ISDN or analog phone line. Calls to and from the PSTN are supported.
Voiceflex SIP trunks are designed to work with PBX devices and have been tested and approved by major vendors. We are able to supply PBX services to your office, as well as interface to existing PBX or SIP Gateway systems.
Key Benefits of SIP Trunks
- Internet to landline telephone calls
- Very competitive call rates
- Free calls to other internet connected users
- Any Number Anywhere. Any geographic numbers to your phone
- Bring the reliability of the internet to your telephone
Download SIP Product Sheet
View Technical Specifications »
Product Details:
- Signalling: SIP (RFC 3261). STUN supported but not required.
- Voice: G.711 μ-law, G.711 a-law, G.729
- DTMF: RFC 2833, SIP INFO
- Fax: Inbound Fax-to-Email available. T.38 support planned.
- Emergency services: 999 and 112 fully supported.
- Security: Authentication by username and password with one-time encryption key.
- Other features: CLIP, CLIR, network call-transfer, music on hold.
- Telephone numbers: Geographic, non-geographic (geographic number porting also supported).
- Required QoS: RTT < 100ms, jitter < 40ms, packet loss < 0.4% (see our networking products).
- Provisioning: 5 to 30 minutes on all products when using web portal, 48 hours on all other orders (except number ports, 30 days).
- Channel: Distributors, Resellers and Dealers. White label options available.
- Support: First-line support by reseller, second and third-line support by Voiceflex.
