Local offices
- London
- 0207 078 9830
- Fleet
- 01252 411 111
- Guildford
- 01483 339 993
- Liverpool
- 0151 2030 200
- Manchester
- 0161 8700 700
- Newcastle
- 0191 3000 666
What are SIP Trunks?
SIP Trunks are a cost-effective alternative to ISDN. The technology carries calls into and out of your business phone system using your internet connection, providing you with superb quality, flexibility and continuity. It’s a truly modern way of carrying your calls.
The benefits of SIP Trunks
A market-leading network
Your calls are carried across Gamma’s market-leading SIP network, giving you enhanced reliability and peace of mind.
Move your numbers with you
SIP trunking allows you to retain your numbers when you move office. No call forwarding necessary.
Flexible. Scalable. Manageable.
Growing business? Seasonal trends? Quickly scale SIP channels according to your needs.
Multiple sites, centralised management
Easily implement SIP across your business and manage it all in one place.
Business-grade resilience
Disaster hit your business? Quickly divert your SIP Trunks to alternative destinations, guaranteeing business continuity.
Cost-efficient
Save up to 60% on your monthly call package compared to ISDN.
Comprehensive support. Peace of mind.
Your SIP Trunks come with complete support from our support desk.
It just works
SIP Trunks are easily implemented with compatible business phone systems, and our service is integration tested and approved for Skype for Business.
The death of ISDN
With ISDN being phased out by 2025, SIP is the go-to technology for you to implement in your business.
SIP Trunks vs ISDN
| SIP Trunks | ISDN | |
|---|---|---|
| Savings | Save up to 60% on your monthly charges | It’s expensive, and getting more expensive |
| Flexibility | Scale up and down at will – instantly | Not a flexible solution. New lines take weeks to provision |
| Control | Manage centrally – you have complete control | Changes can take time to happen |
| Future | The go-to technology that’s secure for the future | Going nowhere fast and gone completely in 2025 |
| Continuity | Handles emergencies with ease. Reroute calls to backup sites in moments | Hope nothing bad happens |