Voice & IP Telephony Solutions

Modern Business Telephony — Secure, Scalable, and Cloud-Ready

Reliable VoIP systems for offices, remote teams, and customer support — powered by Zefsina. 

Why Modern Telephony Matters

Whether supporting remote employees or handling hundreds of inbound calls, you need secure, flexible, and easy-to-manage voice infrastructure.

Business-Class IP Telephony — Built for Scale

Scalable voice systems for teams, clients, and global collaboration. Zefsina designs and maintains modern voice infrastructure tailored to your workflows.

What We Offer:

• Cloud and on-premise PBX systems

• SIP trunking and call routing

• IVR, call queues, and internal extensions

• Secure VoIP over wired and wireless networks

• CRM integrations and call reporting

Security & QoS for Voice

Voice traffic is sensitive — it requires proper prioritization and isolation.

Zefsina configures:

• VLANs for VoIP

• Traffic shaping

• Anti-spoofing, firewall rules

• SIP protection & encryption