AUTHENTIC WHOLESALE
TELECOMMUNICATIONS

Introducing Simwood

Simwood is a leading provider of international carrier services with wholesale IP telephony and a portfolio of quality managed services, focussing on the needs of customers seeking a quality and stability of service that their business can depend on.



Our Network

We own our network and 90% of the traffic across it is voice. On-net in ten data centres for redundancy and availability, we have a pathological hatred of congestion - if a link is routinely more than 20% utilised we upgrade it. We believe we offer the network for voice business.

Whilst our network exists first and foremost to give our customers the best quality of service possible for their voice traffic, we can also offer MPLS, VPLS, Full and Partial IP Transit and co-location services.

 Network Datasheet

VoIP Termination


We offer quality-focussed, competitive SIP termination over our interconnects with national and international carriers allowing you to offer reliable voice to your customers.

100% of UK traffic and the majority of international traffic on our network is terminated via our own direct SS7 interconnects.

View Full Ratecard 

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UK Wide Numbering


With numbering in every UK area code, along with a wide range of UK non-geographic numbers, we can provide suitable numbers for all your customers.

Our dedicated Number Porting Desk are on-hand to manage the often challenging process of number porting. We can port numbers from over 30 telecommunications providers, including hundreds of their resellers.

  Wholesale Voice Datasheet

Real-Time Control


Our market-leading API is at the core of everything we offer, all aspects of our services can be controlled via the API making it easy to integrate our service with your own.

Our Customer Portal is built entirely on our API and brings the unique and powerful features of the Simwood API to a wider audience, in a more human-friendly format.


Fraud Prevention


We are committed to help reduce your exposure to VoIP fraud

Realtime channel and rate limits, fraud hotspot detection, customer configured black and white ACLs, full API control and over 200 checks per call set up all work together to help ensure our customers SIP Carefully.


From the blog

Wholesale voice & SMS rates (2017-03-01)

Friday 24th February 2017

We will be updating our Managed A-Z Termination rates and codes on March 1st 2017. Our rates can be downloaded below. Please see our new brochure to understand our different service levels. You can check (and change) your current service level in the “Commercial” tab of the portal. PACKAGE RATE BY CURRENCY Managed Interconnect Subject to status Virtual Interconnect GBP EUR USD Start-up [...]read more »

New stack part 1 – Opus: the killer codec

Thursday 23rd February 2017

This is the first in a series of posts about new features we’re releasing to our voice stack in the very near future. What makes Simwood unique and very distinct from others who buy a magic VoIP box from a vendor is that our service is built on the best of open-source and the best [...]read more »

Important: Interop changes

Thursday 23rd February 2017

As part of continued improvements to our network we are introducing some new IP addresses for both SIP signalling, and RTP media, traffic across our network from 27th March 2017. At the same time, we are optimising our supported codecs in line with customer use. IP Addresses Please see our revised interop information and ensure that you [...]read more »

Simwood eSMS Limited
2 Venture Road
Southampton
SO16 7NP
United Kingdom

0330 122 3000

Registered in England 03379831