Straight-talking, in writing

The Simwood blog.

Telecoms, AI in the call path, network engineering and the occasional strong opinion. Several times a week since 2009.

LRN-based billing

As many readers will know, we’ve been a domestic operator in the USA as a licensed CLEC since 2017. North America benefits from enviably effective nu…

Cost comparison – send us your CDRs

By Simon Woodhead TLDR: Send us your CDRs from any other provider and we’ll give you a matrix showing what we’d have charged across all our pricing t…

GDPR Data Processing Addendum

One requirement of GDPR, under Article 28, requires that controllers (such as yourselves) may only appoint processors who can provide “sufficient gua…

Privacy Policy Update

We’ve updated our Privacy Policy to bring it into line with the requirements of the new General Data Protection Regulations (GDPR) but also make it a…

Kamailio World 2018 – The AutoPilot Pattern

Inbound Calls and Availability Zones

Many of our customers connect to us in multiple sites, using SRV and DNS to load-balance between their sites. We noticed, however, that some customer…

Inbound HTTP(S) API (“Webhooks”)

We currently have two APIs which send HTTP POST requests to customers; inbound fax, and inbound SMS. These have been in place for many years, and hav…

Reference Architecture

We’ve long been very vocal on our thoughts of how best to architect an ITSP and published ‘Interop Information’ as a guide for interfacing with us. W…

Restoring Confidence in CLI

Ofcom recently published a new Guidelines for Calling Line Identification Facilities which includes amendments to the General Conditions and National…

Our book: “Speaking up on Telephony Risks”

It should be no surprise from our pioneering work around VoIP fraud or our efforts to persuade ITSPs and carriers to ‘give a shit’ about encryption,…

GDPR Consent

By Ross McKillop Unless you’ve been hiding under a rock for the last year or so, and especially the last few months, it’s been hard to miss GDPR and…

Improving DNS

We like to concentrate on what we’re good at, and therefore don’t run our own DNS or Mail services – relying on trusted external providers to provide…