Knowledge base
Guides, references and best practices
Practical, engineer-written documentation covering VoIP fundamentals, SIP trunking, PBX platforms and call-center operations.
Getting Started
- What is a DID number?
- SIP vs PRI: choosing a trunk
- Number portability basics
- Understanding call flow
SIP Trunking
- Configuring TLS + SRTP
- Concurrent channels vs CPS
- Failover & disaster recovery
- Codec selection (G.711, G.729, Opus)
PBX Platforms
- Connect Asterisk to BroadwayVoIP
- FreePBX SIP trunk setup
- Issabel installation walkthrough
- 3CX SIP trunk configuration
Call Center
- Vicidial dialer setup
- Improving Answer-Seizure Ratio
- STIR/SHAKEN and call attestation
- Predictive vs progressive dialing
Security & Compliance
- IP ACLs and authentication
- Fraud prevention basics
- TLS certificate management
- Recording & retention policies
Cloud Telephony
- Hosted PBX architecture
- Scaling call centers to 10k seats
- APIs for programmable voice
- Global number portfolio design
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