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Revolutionizing VoIP

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Seamless Two-Way SIP Trunking with Mission-Critical Reliability!
SIP trunking empowers businesses to run their phone systems over the internet, replacing the need for physical copper lines and on-premise solutions. OLYS SIP Trunking offers flexibility in telephony management, ensuring businesses can optimize their communication strategies while enjoying enhanced voice quality over the PSTN.
- We offer readily deployable SIP Trunks tailored to your channel capacity, putting robust communication solutions at your fingertips.
Premium Quality Origination & Termination
Powerful SIP Trunking Coverage
Outbound Coverage - Local Termination
Outbound Coverage - Local Termination refers to the ability of a SIP trunk to make outgoing calls to local destinations within a specific geographic area, usually within the same country or region. "Local" in this context generally means calls to nearby cities, towns, or the same country.
For example:
- If a business in New York has a SIP trunk with local termination coverage, it can make outgoing calls to numbers within New York City or the surrounding areas, possibly extending to the entire United States, depending on the provider's definition of "local."
Outbound Coverage - International Termination
Outbound Coverage - International Termination refers to the ability of a SIP trunk to make outgoing calls to international destinations, i.e., numbers in different countries around the world. This type of coverage is crucial for businesses that need to communicate globally.
For example:
- A company in London with international termination coverage can place calls to clients, partners, or employees in countries like the United States, Canada, Germany, Japan, etc.
Inbound Coverage - Local & International Origination
Inbound Coverage - Local & International Origination refers to the ability of a SIP trunk to receive incoming calls from both local and international numbers.
- Local Origination means the SIP trunk can receive calls from local numbers within the same country or region.
- International Origination means the SIP trunk can receive calls from numbers in different countries.
For example:
- A business in Tokyo with local and international origination coverage can receive calls from local Japanese customers as well as international clients from countries like the United States, France, Brazil, etc.
Built for Power Users
SIP Trunking Features
Quality VoIP
Scalable VoIP
Advanced Online Monitoring
Advance Debugging
Alerting and Reporting
Emergency Calling
SIP Trunk Types
* Country and Trunk Specific Features. Additionally, some features might incur extra charges as add-ons.
Tech Features | UK SIP - Standard | UK SIP - Bundle | UK SIP - Flex | UK SIP - Failover | INTL SIP - International Breakout | INTL SIP - Local Breakout | ||
---|---|---|---|---|---|---|---|---|
TCP/ UDP | Supported | Supported | Supported | Supported | Supported | Supported | ||
TLS | Supported | Supported | Supported | Supported | Supported | Supported | ||
Codec - G722, G729, PCMA/U | Supported | Supported | Supported | Supported | Supported | Supported | ||
CLI - Passthrough | Yes | Yes | Yes | OLYS Numbers Only | OLYS Numbers Only | |||
Emergency Services | On Request | On Request | On Request | On Request | No | On Request | ||
Voicemail | Yes | Yes | Yes | Yes | Yes | Yes | ||
IP Authentication | Yes | Yes | Yes | Yes | Yes | Yes | ||
Fax T.38 | Yes | Yes | Yes | Yes | Yes | Yes | ||
ACL | Yes | Yes | Yes | Yes | Yes | Yes |
UK Standard SIP Trunk
UK SIP - Standard is a basic SIP trunk service for the UK market. Charges are based on usage and ideal for Small Businesses. This product typically includes:
Pay-as-you-go Pricing
Free Bearer Number
Fix Number of Channels
Basic Features Call Forwarding, Voicemail, and Caller ID

UK Bundled SIP Trunk
UK SIP - Bundle is a SIP trunk service with bundled minutes for UK-based customers. Helps to manage telecom budgets with fixed monthly costs.
Free Bundled Minutes
Free Bearer Number
Fix Number of Channels
Basic Features Call Forwarding, Voicemail, and Caller ID

UK Flex SIP Trunk
UK SIP - Flex is a more flexible SIP trunk service tailored for varying usage patterns. Catering to businesses with fluctuating call volumes.
Pay Less for Your Usage
Free Bundled Minutes
Free Bearer Number
Free Failover SIP Trunk + Basic Features Call Forwarding, Voicemail, and Caller ID

International SIP Trunk- Intl. Breakout
INTL SIP - International Breakout is designed for businesses that need to make a significant number of international calls. This product typically includes:
Pay-as-you-go Pricing
Global Reachability
Basic Features Call Forwarding, Voicemail
Fix Number of Channels

International SIP Trunk- Local Breakout
INTL SIP - Local Breakout is a SIP trunk service that provides local call termination in various international markets. This product typically includes:
Pay-as-you-go Pricing
Competitive Local Rates
Basic Features Call Forwarding, Voicemail
Fix Number of Channels

UK Failover SIP Trunk
UK SIP - Failover is a SIP trunk service with built-in redundancy and failover capabilities. Ensures continuous service by automatically switching to a backup SIP trunk in case of a failure.
High Availability
Multiple Redundant Paths
Basic Features Call Forwarding, Voicemail
Fix Number of Channels

Requirement Identification
Determine Call Volume
Identify Call Types
Feature Needs

Compatibility Check
PBX Compatibility
Codec Support
Equipment

Resource Allocation
Technical Person
Bandwidth Assessment
Power Backup

Network Whitelisting
Firewall Configuration
IP Addresses
QoS Settings

Order Services
Trunk Selection
Plan Selection
Start Configuring







How It Works?
At OLYS, our advanced system and network inspire customer confidence, allowing them to effortlessly acquire and allocate SIP trunks and configurations using an intuitive interface. This efficient approach markedly diminishes the time and technical expertise traditionally required for establishing your VoIP infrastructure.
Sign up for the Customer Self Service (CSS) Portal with OLYS to get started with numbers.
Use OLYS number search tool to look for numbers by region or area code. When you’ve found your perfect one add it to your cart and check out.
Use OLYS CSS Portal to order your SIP Trunks which suites your business model. When you’ve found your perfect one add it to your cart and check out.
Assign your new number to a SIP connection profile from your CSS Portal account.
Engage in seamless conversations—make calls, receive calls, all with your new number in the portal.
Simple Pricing
Choose Your Plan
- United Kingdom
- International
UK Standard SIP Trunk
- Free Bearer Number
- Pay as You Go
- Per Channel Price
- No Inclusive Minutes
UK Bundle SIP Trunk
- 1500 Inclusive UK Minutes
- Free Bearer Number
- Per Channel Price
- No Failover Included
UK Flex-10 SIP Trunk
- 10,000 Inclusive UK Minutes
- 10 Channel Trunk
- Failover Trunk (Pending)
- Free Bearer Number
UK Failover SIP Trunk
- Per Trunk Price
- High Availability
- Automatic Failover
- No Inclusive Minutes
International Breakout
- Per Channel Pricing
- Pay as You Go
- Secure VoIP Service
- Worldwide Termination
Local Breakout
- Per Channel Pricing
- Pay as You Go
- Competitive Local Rates
- Local Dialling and Emergency Services*
Our Testimonials
What They Are Talking About Olys
"OLYS has truly revolutionized our communication infrastructure with their SIP Trunks. The flexibility and ease of managing them through their platform are remarkable. We've gained unparalleled control over our voice services, and the user-friendly interface empowers us to make real-time adjustments effortlessly. OLYS has set a new standard for SIP Trunking, providing us with the flexibility we need to tailor our communication solutions precisely to our business requirements. It's a game-changer!"
Olitha L
- CEO and Founder -
As the CEO and Founder of OLYS Telecom LTD, I am proud of our commitment to delivering exceptional telecommunications solutions. Our dedicated team ensures we remain at the forefront of innovation, providing..
Sarah Thompson
- Small Business Owner
“OLYS Telecom LTD has been a game-changer for my business. Their customer service is outstanding, and they are always quick to resolve any issues. The reliability of their services means I never..
Mark Stevens
- IT Manager - Tech Solutions Ltd
“Working with OLYS Telecom LTD has been a fantastic experience. Their cutting-edge technology and innovative solutions have significantly improved our communication infrastructure. The team at OLYS is knowledgeable and always ready to..
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