Carrier-Grade Telecom
Built for Modern Business
International dialing, SIP trunks for UK, USA & South Africa, a full telecom billing engine compatible with Zoom, Microsoft Teams and Webex, and CallEssential MeetMe video meetings — managed end-to-end by SynergyTalk.
International Dialing
Competitive international termination rates to 200+ destinations with HD voice quality, per-second billing, and real-time balance management. The infrastructure behind the calls your business makes every day.
200+ destinations
Competitive rates to over 200 countries with premium quality routes.
Per-second billing
No rounding up. You pay only for the seconds actually used.
CLI presentation
Present your local number as the outbound caller ID globally.
Premium + LCR routes
Choose between premium quality routes or least-cost routing per destination.
Real-time balance
Pre-pay balance with live deduction and configurable spend alerts.
HD Voice
G.722 wideband codec support for crystal-clear international calls.
Sample Destination Rates
Per-second billing · Premium & LCR routes · Rates excl. taxes
SIP Trunks — UK, USA & South Africa
Local PSTN connectivity with local numbers, emergency services support, and full compliance — works with any SIP-compatible PBX or UC platform.
United Kingdom
Geographic DDI numbers (01/02/03)
- Local UK CLI presentation
- Geographic & non-geographic DIDs
- Emergency 999 support
- Number porting available
United States
Local DID numbers (all area codes)
- Local US CLI presentation
- All area codes available
- E911 compliance
- Toll-free (800/888/877) available
South Africa
Geographic & non-geographic numbers
- Local SA CLI presentation
- Cape Town, Johannesburg, Durban
- Number porting support
- Compliance with ICASA regulations
All SIP trunks support TLS + SRTP encryption, concurrent channel scaling, failover routing, and number porting. Toll-free numbers available in 90+ additional countries through SynergyTalk's carrier partnerships.
Request a SIP Trunk TrialTelecom Billing — For Operators & Resellers
A standalone billing engine for telecom operators, carriers, and resellers who need CDR-level billing, rate management, and white-label invoicing — independent of the UC platform.
Compatible with your UC Platform
Zoom Phone
BYOC (Bring Your Own Carrier) integration. Connect your Zoom Phone deployment to our SIP trunks with full CDR billing.
Microsoft Teams
Direct Routing compatible. Full billing, rate management and CDR reporting for your Teams calling environment.
Cisco Webex
Webex Calling PSTN gateway support. Real-time balance management with automated low-balance alerts.
Any SIP PBX
Works with Asterisk, FreeSWITCH, 3CX, Avaya, Cisco CUCM and any SIP 2.0 compliant platform.
Billing Features
- Real-time CDR (Call Detail Records)
- Buy & sell rate management
- Per-second or per-minute billing
- Automated invoice generation
- Low-balance alerts & auto top-up
- Multi-tenant white-label billing
- Least Cost Routing (LCR) engine
- Fraud detection & spend limits
- REST API for integration
- Custom rate plans per customer
White-Label Ready
Deploy the billing platform under your own brand. Your logo, your domain, your pricing. Ideal for telecom resellers and managed service providers.
Book a Billing DemoCallEssential MeetMe — Video Meetings
Secure, browser-based video meetings with live captions, AI summaries and a built-in whiteboard — fully hosted and managed by SynergyTalk, with no per-user licence lock-in.
HD video meetings
Crystal-clear video and audio with smart bandwidth adaptation, straight from the browser — no app install required.
Host-controlled access
Only registered hosts can start a meeting. Guests join via a simple link once the host is present.
Live captions & translation
Real-time captions with live translation including English, Arabic, Spanish, French, Hindi and Urdu.
AI meeting summaries
Automatic summaries, action items and catch-me-up notes generated after every captioned meeting.
Collaborative whiteboard
Built-in shared whiteboard for sketching, planning and workshops — right inside the meeting.
End-to-end encryption
Optional E2EE for sensitive meetings, plus lobby and password protection on every room.
Works on any network
Firewall-friendly connectivity over standard HTTPS (443) keeps media flowing even on locked-down corporate networks.
Email invites & calendar
One-click email invitations with calendar attachments, sent directly from the meeting.
White-label ready — run meetings under your own brand and domain. Ideal alongside your CallEssential phone system, or as a standalone meeting platform for your organisation.
Emergency Services: SIP Trunk and VoIP services may not support emergency calling (911 / 999 / 112) in all regions. Customers must maintain an alternative means of contacting emergency services.
CallEssential provides SIP Trunks, DID, toll & toll-free numbers subject to carrier availability and applicable telecommunications regulations. Number availability cannot be guaranteed. Services must not be used for robocalling, spam, fraud, caller ID spoofing, or traffic pumping. Charges from compromised SIP credentials remain the customer's responsibility. International rates and regulatory fees may vary without prior notice. Read the full SIP & Telecom Services Terms →
Ready to connect?
Talk to our telecom specialists. We'll assess your requirements and put together a custom quote within 24 hours.