Numbergroup Network Ltd

Luna PBX

Phone system in the cloud, offering great flexibility for managing incoming & outgoing calls, plus massively reduced call rates


  • Configure & manage redirects, voicemail and call recordings remotely
  • Receive incoming faxes securely by email as a PDF attachment.
  • Audio conferencing with moderator and participant PINs.
  • Secure call recordings using enterprise-grade encryption. GDPR Compliant
  • Disaster recovery options allow you to redirect calls remotely
  • Maintain PCI DSS compliance


  • Enjoy HD voice quality (much better than ISDN phone systems).
  • Scaleable from 1-10,000 Handsets
  • Cost saving over ISDN of over 90%
  • Cheapest call costs in the UK


£3 per user per month

  • Education pricing available
  • Free trial available

Service documents

G-Cloud 10


Numbergroup Network Ltd

Jody Rhodes


Service scope

Service scope
Software add-on or extension No
Cloud deployment model Private cloud
Service constraints No
System requirements
  • Systems can be deployed with or without telephone handsets
  • Broadband connectivity

User support

User support
Email or online ticketing support Email or online ticketing
Support response times Standard support within normal UK office hours, telephone, email or IM

Emergency support at all other times, response time within 10 minutes.
User can manage status and priority of support tickets Yes
Online ticketing support accessibility None or don’t know
Phone support Yes
Phone support availability 24 hours, 7 days a week
Web chat support Web chat
Web chat support availability 24 hours, 7 days a week
Web chat support accessibility standard None or don’t know
How the web chat support is accessible Via our website or via our customer admin portal
Web chat accessibility testing Systems already in use by 2000 users
Onsite support Onsite support
Support levels Onsite assistance is provided free of charge and is arranged with our clients within the UK.

A Technical support manager is available 24-7
Support available to third parties No

Onboarding and offboarding

Onboarding and offboarding
Getting started Onsite or online training is available
Service documentation Yes
Documentation formats
  • HTML
  • PDF
End-of-contract data extraction Data is provided via download or USB
End-of-contract process Customers are offered a rolling monthly contract, if not required the PBX and services will be closed, and telephone numbers may be ported to another provider or will be turned off.

Using the service

Using the service
Web browser interface Yes
Supported browsers
  • Internet Explorer 7
  • Internet Explorer 8
  • Internet Explorer 9
  • Internet Explorer 10
  • Internet Explorer 11
  • Microsoft Edge
  • Firefox
  • Chrome
  • Safari 9+
  • Opera
Application to install No
Designed for use on mobile devices Yes
Differences between the mobile and desktop service Our “Luna PBX” app allows you to make and receive PBX calls via your mobile phone easily and securely without requiring any username or password.

Make and receive calls on your mobile handset using HD quality voice.
Put callers on hold and transfer them to colleagues, groups or conferences.
Automatically record calls to meet regulatory requirements.
Have outgoing calls appear from their extension’s phone number.
Performance & Security Features

Our app utilises push technology so can run in the background without affecting battery performance. Wi-Fi or 3G connectivity is required to make and receive calls.
Accessibility standards WCAG 2.0 AA or EN 301 549
Accessibility testing N/a
Customisation available Yes
Description of customisation Number or users
Call hunt groups
Telephone numbers used
Capacity of the PBX
Hold music


Independence of resources Each customers usage is ring fenced within it's own private cloud, not affected by other users.


Service usage metrics Yes
Metrics types Call data can be provided by email on a daily basis if required.
Reporting types
  • API access
  • Real-time dashboards
  • Regular reports
  • Reports on request


Supplier type Not a reseller

Staff security

Staff security
Staff security clearance Conforms to BS7858:2012
Government security clearance Up to Baseline Personnel Security Standard (BPSS)

Asset protection

Asset protection
Knowledge of data storage and processing locations Yes
Data storage and processing locations United Kingdom
User control over data storage and processing locations No
Datacentre security standards Complies with a recognised standard (for example CSA CCM version 3.0)
Penetration testing frequency At least every 6 months
Penetration testing approach In-house
Protecting data at rest
  • Physical access control, complying with CSA CCM v3.0
  • Physical access control, complying with another standard
  • Encryption of all physical media
  • Scale, obfuscating techniques, or data storage sharding
Data sanitisation process Yes
Data sanitisation type Explicit overwriting of storage before reallocation
Equipment disposal approach Complying with a recognised standard, for example CSA CCM v.30, CAS (Sanitisation) or ISO/IEC 27001

Data importing and exporting

Data importing and exporting
Data export approach Via our customer portal, download provided.
Data export formats Other
Other data export formats
  • Wav
  • Mp3
Data import formats CSV

Data-in-transit protection

Data-in-transit protection
Data protection between buyer and supplier networks
  • TLS (version 1.2 or above)
  • IPsec or TLS VPN gateway
  • Bonded fibre optic connections
Data protection within supplier network
  • TLS (version 1.2 or above)
  • IPsec or TLS VPN gateway

Availability and resilience

Availability and resilience
Guaranteed availability
Approach to resilience Upon request
Outage reporting Email alerts and private dashboards

Identity and authentication

Identity and authentication
User authentication needed Yes
User authentication Username or password
Access restrictions in management interfaces and support channels Upon request
Access restriction testing frequency At least every 6 months
Management access authentication Username or password

Audit information for users

Audit information for users
Access to user activity audit information Users have access to real-time audit information
How long user audit data is stored for User-defined
Access to supplier activity audit information Users have access to real-time audit information
How long supplier audit data is stored for User-defined
How long system logs are stored for User-defined

Standards and certifications

Standards and certifications
ISO/IEC 27001 certification No
ISO 28000:2007 certification No
CSA STAR certification No
PCI certification No
Other security certifications No

Security governance

Security governance
Named board-level person responsible for service security Yes
Security governance certified Yes
Security governance standards ISO/IEC 27001
Information security policies and processes Upon request

Operational security

Operational security
Configuration and change management standard Supplier-defined controls
Configuration and change management approach Upon request
Vulnerability management type Supplier-defined controls
Vulnerability management approach Upon request
Protective monitoring type Supplier-defined controls
Protective monitoring approach Upon request
Incident management type Supplier-defined controls
Incident management approach Upon request

Secure development

Secure development
Approach to secure software development best practice Conforms to a recognised standard, but self-assessed

Public sector networks

Public sector networks
Connection to public sector networks No


Price £3 per user per month
Discount for educational organisations Yes
Free trial available Yes
Description of free trial Fully featured free trial as per the clients request


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