SIP Trunking

SIP (Session Initiation Protocol) Trunking enables voice communication between your telephone system (PBX) and the telephone network to share your data connections.

Business Talk SIP 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.

Business Talk SIP Overview
Features & Benefits
Pricing & Additional Information

Business Talk SIP

As an alternative to traditional telephone connections, Business Talk SIP provides a fully featured, cost effective and proven choice for voice communication. Delivered exclusively over Zen’s award-winning Connectivity, and carried across our highly resilient network, you can be assured of excellent call quality.

There are also additional benefits of Business Talk SIP 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.

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
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
Extended telephony - easily add mobile and home-working telephony to your current phone system
24/7 availability - all our networks are monitored and managed by experienced InTechnology technical specialists giving you unbroken access to your voice and data systems

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 the Zen Connectivity products, including ADSL Broadband, Fibre Optic Broadband or Leased Line

SIP Trunking 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)

UK call rates

Destination	Daytime (7am - 7pm)	Evening (7pm - 7am)	Weekend (Fri 7pm - Mon 7am)
UK Landline	0.84p	0.70p	0.70p
T-Mobile	8.00p	8.00p	6.00p
O2	8.00p	8.00p	6.00p
Orange	8.00p	8.00p	6.00p
Vodafone	8.00p	8.00p	6.00p
3	9.00p	8.00p	6.00p
UK 0800	0.00p	0.00p	0.00p
Operator LCFA 0845	4.50p	3.00p	3.00p
UK 0870	1.25p	1.00p	1.00p
UK 0844	6.00p	8.00p	8.00p
UK 0871	10.00p	10.00p	10.00p

Key international call rates

Destination	ppm
AUSTRALIA	1.50
AUSTRIA	1.90
BANGLADESH	4.20
BELGIUM	1.90
BRAZIL	2.40
CANADA	0.80
CHINA	1.30
CZECH REPUBLIC	2.25
DENMARK	1.18
ESTONIA	1.50
FRANCE	1.20
GERMANY	1.35
GREECE	1.70
HONG KONG	2.40
HUNGARY	3.20
ICELAND	2.00
INDIA	2.94
IRELAND	0.90
ITALY	1.30
JAPAN	2.60
LATVIA	2.50
LITHUANIA	2.69
LUXEMBOURG	1.70
MALAYSIA	1.09
NETHERLANDS	1.60
NEW ZEALAND	1.35
NORWAY	1.80
PAKISTAN	5.89
POLAND	1.61
PORTUGAL	1.80
ROMANIA	2.11
RUSSIA	1.39
SAUDI ARABIA	9.00
SINGAPORE	1.10
SLOVAKIA	2.41
SLOVENIA	2.35
SOUTH AFRICA	3.87
SPAIN	1.50
SWEDEN	1.30
SWITZERLAND	1.50
THAILAND	2.85
TURKEY	2.11
UNITED ARAB EMIRATES	16.00
UNITED STATES	0.80

Zen Internet approved SIP Trunking systems

IP PBX

Asterisk
Cisco Unified Communications Manager
3CX
Cisco Call Manager Express
Avaya IP Office
FreePBX
Linksys SPA 9000

TDM/IP Gateway

Vegastream

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.