Optimizing Dedicated Internet Access for High-Volume VoIP and Call Centers
Learn why Dedicated Internet Access (DIA) is critical for VoIP stability, focusing on codec requirements, jitter, and QoS for mission-critical call centers.

The Necessity of DIA for Real-Time Voice
For enterprise call centers, shared broadband is a liability. Smartnett delivers 99.999% SLA connectivity across our 53,100+ km fiber backbone, ensuring that your VoIP traffic bypasses the congestion common in residential-grade connections.
VoIP Technical Requirements
Voice quality depends on three pillars: low latency (<150ms), minimal jitter (<30ms), and near-zero packet loss (<1%).
| Codec | Bandwidth per Call | QoS/DSCP Tagging | | :--- | :--- | :--- | | G.711 (Uncompressed) | 87.2 Kbps | EF (Expedited Forwarding) | | G.729 (Compressed) | 31.2 Kbps | EF (Expedited Forwarding) | | G.722 (HD Audio) | 95.0 Kbps | EF (Expedited Forwarding) |
Configuring QoS and Redundancy
To maintain voice integrity, your edge routers—ideally Cisco or MikroTik hardware—must implement strict DSCP tagging. By marking traffic as Expedited Forwarding (EF), you ensure that your voice packets are prioritized in our 400 Gbps core capacity. Furthermore, our DIA solutions support BGP-based failover, guaranteeing that your SIP trunks remain active even during fiber path interruptions. With our 24/7 NOC monitoring, we maintain the throughput required for your concurrent call capacity without degradation.
Written by
Eng. Fernanda Quintana Rojas
Network Engineering — Smartnett
Cybersecurity Engineer (UPAEP). Specialist in DDoS protection, core firewalls, and IPsec encryption for enterprise links. 8 years securing corporate connectivity.


