VoIP and Power Cuts

The shift from traditional landlines to Voice over Internet Protocol (VoIP) systems has brought significant advantages, including cost savings, flexibility, and integration with IT systems. However, it has also introduced a critical vulnerability: the reliance on mains power.

Unlike traditional copper-wire landlines, which could operate during power outages by drawing power directly from the telephone exchange, modern VoIP systems and DECT (Digital Enhanced Cordless Telecommunications) phones require local power to function. This dependency has led to concerns about communication resilience during power cuts.

The Challenge: Power Dependency in VoIP Systems

Traditional landline phones worked seamlessly during outages because they relied on the electrical current supplied through copper phone lines. This feature made them a lifeline in emergencies. In contrast, VoIP phones, particularly DECT systems with powered base stations, are wholly reliant on mains electricity to operate. If the power goes out, so does your ability to make or receive calls unless a contingency plan is in place.

This dependency extends beyond the phones themselves. Routers, which are critical for VoIP connectivity, also require power. Without a working router, even a VoIP phone with a charged battery becomes useless. These vulnerabilities highlight the need for robust backup power solutions.

Power Cuts in the UK: Frequency and Impact

Research suggests that the provider with the highest average downtime in the UK reported just under one hour of service interruption annually. However, these figures can be skewed by areas that experience minimal outages, masking the challenges faced by rural regions. In parts of the UK prone to adverse weather, such as Scotland, the South West, and Wales, outages can last significantly longer during storms or heavy snowfall.

For vulnerable and elderly populations, who may rely heavily on their phone lines for emergency communication, the loss of telephony during a power cut can be life-threatening. As the UK transitions away from traditional landlines to VoIP as part of the Digital Voice initiative, addressing these risks has become even more critical.

Practical Power Outage Solutions When Dealing With VoIP and Power Cuts

To address this challenge, businesses and individuals can adopt several proactive measures to ensure their VoIP systems remain operational during power cuts. These include implementing a combination of backup power solutions, alternative communication methods, and training.

Create a Power Outage Management Strategy

A comprehensive strategy ensures that users know exactly what to do when a power outage occurs. This should include steps like enabling automatic call forwarding to alternative devices, configuring backup power systems, and maintaining updated contact information for key team members. For businesses, partnering with third-party call centres can provide an added layer of reliability.

Invest in Backup Power Solutions

Backup power solutions like uninterruptible power supply (UPS) systems can keep critical devices like routers and DECT base stations operational. Here are some details to consider:

  • UPS Runtime Estimates: An APC Back-UPS ES700 can power a router (12-20W) and DECT base station (2-5W) for 1.5-2 hours. For lower-power setups, runtime can extend to 3-4 hours. Higher-capacity UPS systems are recommended for businesses requiring extended resilience.
  • Power over Ethernet (PoE): PoE-enabled phones can draw power directly from a central PoE switch or injector, simplifying the setup and ensuring continued functionality during outages if the switch is connected to a UPS.
  • Battery Maintenance: UPS batteries typically last 3-5 years but degrade over time. Regular testing and replacement are critical to maintaining reliability.

Use Mobile Apps or Forarding for Continuity

Many VoIP providers offer mobile apps that allow users to make and receive calls using their business numbers. As long as a mobile device is charged and connected to cellular data, communication can continue uninterrupted. Apps from providers like Zoiper, Gamma Horizon, and Yealink are widely available and simple to set up. Optionally and for people with a poor data connection but could 3g/gsm connection call forwarding to mobile might be a good alternative.

Educate and Train Users

Providing training on power outage management ensures that all users understand their roles during disruptions. Training should cover using backup systems, handling call forwarding, and utilising mobile apps. Regular drills can help reinforce these practices and ensure readiness.

Advanced Solutions for Resilience

For businesses or households in regions with frequent outages, more robust solutions may be required:

  1. Higher-Capacity UPS Systems: For setups with multiple devices, consider UPS systems with larger batteries or extended runtime options.
  2. Solar-Powered Backup Systems: Solar panels with battery storage can provide a renewable energy solution for long-term outages.
  3. Integrated Smart Systems: Devices that combine VoIP functionality with integrated battery backups, such as some PoE-enabled routers, can simplify operations and reduce reliance on multiple power sources.

Mitigating Risks for Vulnerable Populations

For the elderly and vulnerable, losing phone connectivity during a power cut can be critical. Proactive measures include:

  1. Providing Backup Power: Ensuring UPS systems are available and functional in homes that rely on VoIP.
  2. Education and Support: Teaching users how to test and maintain backup systems.
  3. Alternative Communication Methods: Keeping mobile phones charged as a secondary communication option during outages.

Balancing Innovation and Practicality

The transition from traditional landlines to VoIP systems represents a step forward in communication technology. However, as with any innovation, it brings new challenges. Addressing the issue of power dependency is critical to ensuring that VoIP systems can provide the same level of reliability as their predecessors.

By adopting efficient backup solutions and understanding the limitations of battery technology, businesses and individuals can mitigate the risks associated with power outages. The ultimate goal is to achieve a balance between innovation and practicality, ensuring that modern communication systems remain resilient in the face of adversity.

If you’re considering switching to VoIP or need advice on backup solutions tailored to your needs, get in touch with our team today for a personalised quote and expert guidance. Let us help you build a resilient communication strategy that keeps you connected, no matter what.

FAQ

What happens to my VoIP phone during a power cut?

Without power, VoIP phones and routers will stop functioning unless connected to a backup power solution like a UPS or a mobile app is used as an alternative.

How can I use my VoIP system during a power outage?

You can connect your router and VoIP devices to a UPS, use PoE-enabled phones with a powered switch, or rely on your VoIP provider’s mobile app with a cellular data connection.

What is the best backup power solution for my VoIP system?

A UPS tailored to your setup is ideal. For example, the APC Back-UPS ES700 can provide up to 2 hours of power for a router and phone. PoE systems or solar-powered solutions are also excellent for long-term resilience.

Are power cuts frequent in the UK?

Power cuts in the UK are generally infrequent, with the average downtime being less than one hour annually. However, rural and weather-prone areas may experience longer and more frequent outages.

Can PoE phones help during power cuts?

Yes, PoE phones powered through a UPS-connected switch or injector can remain functional during a power outage, eliminating the need for separate power adaptors.

What should I do to prepare for a VoIP outage caused by a power cut?

Implement a backup power plan, configure call forwarding to alternative devices, and train users to handle power cuts effectively.

How can businesses ensure continuity during a power cut?

Businesses should invest in higher-capacity UPS systems, consider call forwarding to remote staff or call centres, and use mobile apps provided by their VoIP service.

What should vulnerable populations do to stay connected during a power cut?

Vulnerable individuals should ensure they have access to UPS systems, charged mobile phones, and clear guidance on how to maintain communication during outages.

How often should I replace my UPS battery?

UPS batteries typically last 3-5 years. Regular testing and replacement as needed are essential to ensure reliability during a power outage.

Voice over Internet Protocol (VoIP) has transformed the telecommunications landscape, offering organisations the promise of cost savings and seamless integration with IT systems. However, as highlighted by consultant Wil Allsopp in research conducted by Secure Test, this revolutionary technology comes with significant security risks.

This article is inspired by a 2004 piece published on Continuity Central, which explored the vulnerabilities of VoIP systems during their early adoption. While the original page now redirects to a GoDaddy placeholder, the insights shared then remain as relevant as ever. Over the years, VoIP technology has improved in many ways, but critical vulnerabilities have also evolved, creating new challenges for businesses.

The Early Days of VoIP: Promise and Risk

Since the 1990s, VoIP has been touted as the “next big thing” in enterprise communications. Its appeal lay in cost savings—both on call charges and infrastructure—and its ability to integrate with IT networks. Wil Allsopp observed:

“As companies have double-locked the doors by spending on security for the data network, they may have left the windows open by pursuing savings in areas such as VoIP.”

Secure Test’s research focused on Cisco’s 7900 series phones, a leading enterprise solution at the time. The vulnerabilities uncovered highlighted the risks of transitioning traditional telephony systems to IP networks.

2004 Findings: Exposing VoIP’s Weaknesses

Secure Test identified key vulnerabilities in early VoIP systems that presented significant security concerns:

  1. Denial of Service (DoS) Attacks
    Attackers could exploit Cisco’s Skinny Client Control Protocol (SCCP) by sending malformed messages or overwhelming packets to crash phones or disrupt entire systems.”It would be relatively trivial for an attacker to disable an entire phone system in minutes,” Allsopp explained.
    Additionally, Cisco 1760 routers were vulnerable to a specific DoS attack: sending large messages (over 50,000 characters) to port 2000 forced all connected phones to reboot simultaneously.
  2. Interception and ARP Spoofing
    Without encryption, VoIP calls were highly susceptible to eavesdropping. Attackers could use ARP spoofing to conduct “man-in-the-middle” attacks, intercepting conversations or injecting malicious data streams.
    Allsopp noted:”Where data is not encrypted, it is relatively easy to intercept, listen in on, or record conversations on any phone from any other phone point on the network.”
  3. Challenges with Patching
    Unlike PCs and servers, VoIP hardware was harder to patch, leaving vulnerabilities unaddressed for extended periods. Secure Test responsibly reported these issues to Cisco, but progress was slow. Allsopp warned:”If the window of exposure cannot be effectively shortened by a company with the development capacity of Cisco, this could be seen as a good argument not to run phones on open IP networks.”

How Far Have We Come?

Since 2004, significant improvements have been made in VoIP security, including:

  • Encryption Adoption
    Modern VoIP systems now support encryption protocols like Secure RTP (SRTP) and Transport Layer Security (TLS) to protect voice data. However, not all organisations enable these features, leaving some communications vulnerable.
  • Improved Hardware and Software Updates
    Manufacturers have streamlined patching processes, making it easier to update VoIP hardware and firmware. Automatic updates are now a standard feature in many systems.
  • Advanced Threat Detection
    Today’s VoIP networks benefit from intrusion detection systems (IDS) and real-time monitoring tools, which can identify and mitigate suspicious activity.

Where Risks Persist

Despite these advancements, some vulnerabilities remain:

  • Integrated Networks
    The convergence of telephony and IT systems creates a larger attack surface. Compromising one system can provide attackers with access to the entire network.
  • Malware and Automation
    Attackers now use sophisticated malware and automation tools to exploit VoIP vulnerabilities. For example, Trojans can intercept calls or conduct DoS attacks remotely with minimal effort.
  • Encryption Gaps
    Many organisations still fail to enable encryption or use outdated protocols, exposing communications to potential interception.

Mitigating Today’s VoIP Security Risks

To address these risks, organisations must adopt a proactive approach to VoIP security:

  1. Enable Encryption
    All VoIP traffic should be encrypted using SRTP or TLS to prevent eavesdropping and data injection.
  2. Segment Networks
    Use virtual LANs (VLANs) to isolate VoIP traffic from other data, reducing the risk of cross-contamination during breaches.
  3. Monitor and Audit
    Deploy VoIP-specific intrusion detection systems (IDS) and conduct regular security audits to identify and resolve vulnerabilities.
  4. Update Regularly
    Keep firmware and software current to ensure protection against known vulnerabilities.
  5. Educate Employees
    Train staff to recognise phishing attempts and adopt good cybersecurity hygiene.

Balancing Innovation and Security

Wil Allsopp’s observations in 2004 remain a vital reminder of the trade-offs organisations face when adopting new technologies:

“There is a trade-off between risk and cost. As organisations adopt VoIP, they must ensure the balance doesn’t tip too far towards cost savings at the expense of security.”

By learning from the past and adopting modern security practices, businesses can enjoy the benefits of VoIP without exposing themselves to unnecessary risks. As technology continues to evolve, vigilance and adaptation will be key to securing the future of communications.

This article is inspired by a 2004 piece originally published on Continuity Central. The content has been updated with modern insights and recommendations to reflect the current state of VoIP security.

In the UK, 0330 numbers have become a common choice for businesses and organisations looking for a professional and flexible phone number. However, one question that often comes up is: “How much does it cost to call an 0330 number?” Let’s break it down clearly so you know what to expect.

What Are 0330 Numbers?

0330 numbers are part of the non-geographic 03 number range in the UK. Unlike traditional landline numbers (which begin with 01 or 02), 0330 numbers are not tied to any specific location. They’re particularly popular with businesses because they allow for a nationwide presence without being limited to a regional area.

Importantly, the cost of calling 0330 numbers is designed to align with standard UK landline rates. This predictability is one reason they’ve become so widespread.

0330 Phone Numbers

Cost of Calling an 0330 Number from a Mobile

If you’re calling an 0330 number from your mobile, the costs are straightforward:

  • Included in Bundles: Calls to 0330 numbers are treated the same as 01 or 02 numbers. If your mobile plan includes free minutes to landlines, calls to 0330 numbers will be deducted from your allowance. No extra charges apply unless you exceed your limit.
  • Exceeding Allowances: If you’ve run out of included minutes, your provider’s standard rates for landline calls will apply. These typically range from 3p to 65p per minute, depending on your mobile network and plan.

Cost of Calling an 0330 Number from a Landline

For landline users, the pricing structure is similarly simple:

  • Per-Minute Charges: Calls to 0330 numbers cost up to 16p per minute, depending on your provider.
  • Call Set-Up Fees: Some landline providers may apply a call connection fee, often around 23p. It’s worth checking with your provider for the most accurate pricing.

Why Are 0330 Numbers Popular?

0330 numbers are often chosen by businesses for their flexibility and professionalism. Key benefits include:

  • Nationwide Presence: They provide a professional image that isn’t tied to a specific region, making them ideal for organisations operating across the UK.
  • Transparent Costs: Customers know they’re paying standard rates, which helps build trust and avoids the impression of hidden charges.
  • Flexibility: Calls to 0330 numbers can be routed to mobile phones, landlines, or call centres, giving businesses more control over how they manage incoming calls.

The History of 0330 Numbers: When and Why They Were Introduced

0330 numbers are part of the broader 03 number range introduced in the UK by Ofcom in 2007. This range was designed to address several challenges associated with older non-geographic numbers, such as those starting with 08, which often incurred higher call costs and caused confusion for callers.

Before 03 numbers, businesses frequently used 084 and 087 numbers. While these were effective for providing a nationwide presence, they often came with premium-rate charges, leaving many customers dissatisfied and reluctant to call. Recognising the need for a fairer and more transparent alternative, Ofcom introduced the 03 range, which includes 0330 numbers.

Key Features of 0330 Numbers at Launch:

  • Cost Alignment with Landlines: Calls to 03 numbers, including 0330, were charged at the same rate as standard geographic numbers (01 and 02), making them more affordable and predictable for consumers.
  • Non-Geographic Nature: Like their 08 counterparts, 0330 numbers are not tied to a specific region, allowing businesses to appear as though they have a nationwide reach.
  • Improved Trust: By eliminating the premium-rate stigma associated with 08 numbers, 0330 numbers aimed to enhance customer trust and encourage more engagement.

Since their introduction, 0330 numbers have grown in popularity, becoming a go-to choice for businesses and organisations seeking professional, flexible, and cost-effective communication solutions. Their adoption has significantly improved the experience for customers and callers, aligning with modern expectations for transparency and fairness in telephony.

For businesses, the launch of 0330 numbers marked a pivotal shift towards a more customer-centric approach to communication, one that prioritises affordability and ease of access. Today, they remain a staple for organisations looking to maintain a professional presence without imposing additional costs on their audience.

Considering an 0330 Number for Your Business?

If you’re exploring 0330 numbers for your organisation, choosing the right provider is essential. At Plexatalk, we specialise in helping businesses set up and manage professional phone numbers that meet their needs. Whether you want to purchase a new 0330 number or migrate an existing one, we’ve got you covered.

Get in touch with our friendly team today to find out how an 0330 number can enhance your business communications. Call us at 0330 057 6699 or email info@plexatalk.co.uk.

0330 Numbers – FAQ

Are 0330 numbers free to call?

No, 0330 numbers are not free to call. However, they are charged at the same rate as standard landline numbers (01 or 02). If your phone plan includes free minutes to landlines, calls to 0330 numbers are typically included.

Do 0330 numbers cost extra on mobile phones?

Calls to 0330 numbers are treated the same as 01 or 02 numbers. If your mobile plan includes free landline minutes, you won’t incur extra charges unless you exceed your allowance.

How much does it cost to call an 0330 number from a landline?

The cost to call an 0330 number from a landline can range up to 16p per minute. Some providers may also apply a call set-up fee, often around 23p. For Plexatalk pricing see our pricing page.

Why do businesses use 0330 numbers?

Businesses choose 0330 numbers for their nationwide appeal, transparent pricing, and flexibility. They provide a professional image and can be redirected to various devices, ensuring seamless communication.

Are 0330 numbers included in phone plans?

Yes, 0330 numbers are included in most UK phone plans’ free minutes, just like standard landline numbers. Always check with your provider to confirm your plan’s specifics.

Can I get an 0330 number for my business?

Absolutely! If you’re interested in getting an 0330 number for your business, please get in touch today.

Are 0330 numbers tied to a specific location?

No, 0330 numbers are non-geographic, meaning they are not linked to any specific region. This makes them ideal for businesses with a nationwide presence.

Are 0330 numbers cheaper than premium-rate numbers?

Yes, 0330 numbers are much cheaper than premium-rate numbers (such as those starting with 09). They are charged at standard landline rates, making them more affordable and predictable for callers.

You can also find out more about 03 numbers including 0330 on the ofcom website.

Landline Cloud

At Plexatalk, we’re committed to delivering tailored telecommunications solutions for businesses of all sizes. From feature-rich VoIP systems to advanced call management tools, we’ve built our reputation on flexibility, reliability, and innovation. Now, we’re delighted to introduce Landline Cloud – our latest self-service platform designed for small businesses and entrepreneurs who need a simple, streamlined way to manage their virtual numbers.

What is Landline Cloud?

Landline Cloud is the self-setup solution for businesses that need professional, local landline numbers without the hassle of hardware or IT support. With Landline Cloud, you can instantly purchase a virtual number and direct incoming calls to your mobile or other devices. The platform is designed for simplicity, allowing you to set up and manage your virtual numbers through an intuitive dashboard in just minutes.

Key Features of Landline Cloud

  • Self-Setup: Purchase a number, point it to your mobile, and start taking calls—all without needing technical assistance.
  • User-Friendly Dashboard: Manage call forwarding, access call recordings, upload voicemail prompts, and more through a clean, intuitive interface.
  • Call Recording: Listen to up to 7 days of call recordings (depending on usage) for better customer management.
  • Email Notifications: Get instant alerts for missed calls and voicemails.
  • Flexibility: Divert calls to up to 15 mobile numbers or email addresses.

When Should You Use Landline Cloud Over Plexatalk?

While both Landline Cloud and Plexatalk are part of DMV Telecom Ltd, they serve different needs. Here’s when Landline Cloud might be the better choice:

Choose Landline Cloud If You:

  1. Need a Simple, Self-Service Solution:
    • If you’re a small business or entrepreneur looking for a quick and hassle-free way to set up a professional number, Landline Cloud’s self-setup option is ideal.
  2. Want a Local Presence Without a Full VoIP System:
    • Landline Cloud allows you to establish a local presence with numbers for specific area codes, such as Aberdeen (01224), without committing to a more feature-rich VoIP solution.
  3. Value a Clean and Simple Dashboard:
    • The Landline Cloud interface is designed for ease of use, allowing you to manage forwarding settings, listen to call recordings, and adjust voicemail prompts with just a few clicks.
  4. Prefer a Low-Cost Monthly Plan:
    • At £10/month, Landline Cloud offers an affordable way to create a professional image without investing in more advanced systems.

When to Choose Plexatalk Instead

Plexatalk, on the other hand, is our feature-rich VoIP platform, designed for growing businesses with more complex communication needs. Plexatalk offers all the benefits of Landline Cloud, plus additional features such as:

  • Full VoIP solutions with handset support.
  • Advanced call routing and PBX options.
  • Customisable plans for businesses with higher call volumes or multiple locations.

If you’re looking for a system that supports team collaboration, call centre functionality, or enterprise-level scalability, Plexatalk is the best choice.

How Are They Connected?

Both Landline Cloud and Plexatalk share the same foundation of quality, reliability, and outstanding customer support that DMV Telecom Ltd is known for. If you start with Landline Cloud and find that your needs grow, you can seamlessly transition to Plexatalk without changing your number or disrupting your service.

Why Choose Landline Cloud from DMV Telecom Ltd?

At DMV Telecom Ltd, we understand that one size doesn’t fit all when it comes to communication solutions. That’s why we’ve developed platforms like Landline Cloud to meet the diverse needs of businesses. Whether you need a comprehensive VoIP solution or a self-service virtual landline, we’ve got you covered.

Get Started Today

Discover the simplicity of managing your business calls with Landline Cloud, or explore the advanced features of Plexatalk for a more robust communication system. Whatever your needs, DMV Telecom Ltd is here to help you stay connected.

  • Visit Landline Cloud to learn more or sign up today.
  • Explore Plexatalk to find the right VoIP solution for your growing business.

Happy New Year from Plexatalk! As we welcome 2025, we’re excited to share some vital updates designed to protect you from scam calls. Ofcom’s updated Calling Line Identification (CLI) Guidance is set to take effect this year, marking a significant step in the fight against fraud.

Protecting Consumers: Why These Changes Matter

Scam calls remain a significant problem in the UK, with millions of people targeted each year. According to Ofcom, 82% of UK adults received a suspicious call or message in 2022, with scammers often impersonating trusted organisations or individuals.

The financial impact is severe. Data from UK Finance reveals that total fraud losses across the UK reached £1.2 billion in 2022, with a substantial portion attributed to phone scams. Beyond financial loss, victims suffer emotional distress and a loss of trust in their communication systems.

Scammers often exploit overseas systems to mimic UK numbers, making their calls appear trustworthy. Ofcom’s updated CLI Guidance introduces measures to block these fraudulent calls, reducing risks to consumers.

Key Changes You Need to Know

From 29 January 2025, stricter rules will govern how phone numbers are displayed on incoming calls. Here’s what it means for you:

1. Blocking Spoofed UK Numbers from Abroad

Scammers often use overseas systems to mimic UK numbers. Under the new rules:

  • International calls displaying a UK number (as their Calling Line Identification or CLI) will be blocked unless they meet specific criteria.
  • Calls that do not pass enhanced checks will no longer reach your phone, significantly reducing scam risks.

2. Exceptions for Legitimate Callers

Some legitimate scenarios will be exempt, ensuring genuine calls get through. For example:

  • UK Mobile Users Abroad: Calls made by UK mobile users (+447 range) while roaming overseas to contact UK numbers.
  • Calls to Roaming UK Mobile Users: Calls to a UK mobile number when the recipient is roaming outside the UK.
  • Verified Origin on UK Networks: Calls originating on a UK network, even if they transit internationally.
  • Representing UK Businesses Abroad: Calls from UK businesses or individuals using non-UK networks, including cloud-based services.

3. Expanded Exception Tools

Providers will manage these exemptions through enhanced exception tools, ensuring legitimate calls are identified and processed appropriately.

How These Changes Benefit You

  1. Enhanced Trust in Calls
    By blocking fraudulent calls from spoofed UK numbers, you can trust that calls appearing from UK numbers are genuine.
  2. Reduced Scam Risk
    International numbers often raise suspicion, but scammers bypass this by spoofing UK numbers. Blocking this tactic makes scams easier to spot.
  3. Financial and Emotional Protection
    With £1.2 billion lost to fraud in 2022, these measures could save countless individuals from falling victim to phone scams, protecting both finances and peace of mind.
  4. Support for Vulnerable Groups
    Many scams target vulnerable individuals. Blocking suspicious calls reduces the volume of fraudulent activity reaching those most at risk.

What You Can Do

While these changes will reduce scam calls, vigilance remains important:

  • Be Wary of Unfamiliar Numbers: Calls from numbers you don’t recognise, especially international CLIs, should be treated with caution.
  • Verify Suspicious Calls: If in doubt, hang up and contact the organisation directly using verified contact details.
  • Avoid Sharing Sensitive Information: Never provide personal or financial details over the phone unless you are certain of the caller’s identity.

Our Commitment to You

At Plexatalk, we are committed to implementing these changes seamlessly to protect our customers. From 15 January 2025, enhanced CLI checks will go live across our network, blocking fraudulent calls while ensuring legitimate communications are unaffected.

We’re here to answer any questions and support you through these changes. Together, let’s make 2025 the year we take back control from scammers.


Sources

UK Finance Annual Fraud Report 2023

ONS: Nature of Fraud and Computer Misuse in England and Wales, Year Ending March 2022