SIP Trunking

SIP Trunking

SIP Trunking enables voice communication between your telephone system (PBX) and the telephone network to share your data connections. Our Business Talk SIP product has been designed for businesses that are looking for increased flexibility and cost reduction from their current phone service, and represents either a full or partial replacement of traditional analogue or digital ISDN lines. It can be used as a more cost effective and quicker way of providing additional capacity to your business. This is particularly useful when relocating offices, or when staffing levels are flexible.

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To request more information about SIP trunking solutions and what would work best for your business, please complete the form below.

Business Talk SIP

As an alternative to traditional telephone connections, SIP Trunks provides a fully featured, cost effective and proven choice for voice communication. Delivered exclusively over our award-winning Connectivity products (including Broadband, Fibre Optic Broadband or Leased Line), and carried across our highly resilient network, you can be assured of excellent call quality.

There are additional benefits of SIP Trunks for disaster recovery and business continuity planning applications. In the event that your business is forced to close an office in an emergency, your calls can be automatically re-routed to another office or answering location. This allows your business to continue even if in temporary accommodation.

We have official interop status with the following vendors:

  • Snom
  • Mitel
  • Avaya
  • UM Labs
  • ShoreTel
  • 3CX

Features & benefits of SIP Trunking

  • Extensive costs savings - benefit from more affordable connection, rental and call charges compared to traditional ISDN services. Multi-site customers can also benefit from free site-to-site calls with savings as much as £1,200 a year when compared to ISDN30
  • Number flexibility - use numbers from any area in the UK, giving your business a local presence and feel to your customers
  • Business continuity - support your disaster recovery strategies as alternative routing can be automatically implemented in emergency situations saving money on costly call-forwarding
  • Highly scalable - as your business grows, additional call capacity can be added quickly, and in much less time than traditional ISDN services
  • Award-winning Customer Service and Technical Support - with an option for 24/7/365 Support available
  • Number portability - if you are looking to move to SIP from ISDN, then you can bring your numbers with you
  • Convergence - our SIP Trunking connects your phone system to the public telephone network via the same network connection as your data services, lowering your costs and improving your service
  • 24/7 availability - all our networks are monitored and managed by experienced UK-based technical specialists giving you unbroken access to your voice and data systems
  • Enterprise Mobility - employees can be working from home, or on the road, and make and receive calls as if they were in the office using their office DDI number

Our Network

  • Resilient 100Mbps Internet connection
  • Flexible data transfer bandwidth allowances

What you will need to use our SIP Trunk service

  • An IP PBX with SIP interface or a PBX plus a TDM/IP gateway
  • Any of our Connectivity products

SIP Trunk Pricing

No. of Channels Connection Fee Monthly Rental
Max 8 £25.00 £30.00
10 £25.00 £50.00
15 £25.00 £60.00
20 £25.00 £70.00
30 £25.00 £90.00
31+ £POA £POA

SIP Trunking Call Rates (pence per minute) for Business Talk SIP

Zen has experienced connecting SIP to the following systems:

  • IP PBX
    • Samsung
    • Asterisk
    • 3CX
    • Mitel
    • Cisco
    • Avaya
    • Panasonic
    • Draytek
  • TDM/IP Gateway
    • Samsung
    • Sangoma
    • SNOM
  • Session Border Controller
    • UM Labs

Optional Add Ons

Inbound Numbers - We can provide you with UK Geographic and Non Geographic numbers to terminate on your service. All available UK Dial Codes and 03, 05 numbers are supported.