SIP Trunking ·
What Is a SIP Trunk? A Plain-English Guide for 2026
Channels, call flow, how it compares to PRI, and what you actually pay for.
Blog category
SIP Trunking
How SIP trunks work, what they cost, how to size channels and which codecs to run.
5 articles
SIP Trunking ·
SIP Trunk vs PRI: Cost, Quality and Migration
A cost comparison and a migration checklist for teams still running E1/T1 circuits.
SIP Trunking ·
G.711 vs G.729: Bandwidth, Quality and When to Use Each
Bandwidth per call with overhead, MOS impact and transcoding trade-offs.
SIP Trunking ·
How Many SIP Channels Do You Need? (With Calculator Formula)
Erlang B basics, busy-hour traffic and a worked sizing example.
SIP Trunking ·
SIP Trunking for Call Centres: Setup, Routes and Scaling
CPS limits, route selection, CLI strategy and scaling past 500 channels.