Guides, tutorials, and best practices for SIP trunking, Asterisk, FreePBX, and VoIP
Practical tutorials and guides for VoIP professionals
Step-by-step guide to configuring a PJSIP SIP trunk in Asterisk 18+. Includes IP authentication, TLS/SRTP encryption, and dialplan examples.
Compare top SIP trunk providers on pricing, reliability, codec support, and Asterisk compatibility. Side-by-side feature comparison.
Keep your existing number when switching to SIP. LOAs, timelines, common rejections, and how to avoid downtime.
How to purchase local DIDs, configure inbound routing, and manage multiple numbers on a single SIP trunk.
How toll-free porting differs from local numbers. RespOrg transfers, timelines, and SIP trunk configuration.
Get a free test trunk with a DID. Verify your Asterisk or FreePBX configuration with real calls before going live.
Compare cost, reliability, scalability, and features. Why most businesses save 80%+ by switching from PRI to SIP.
Prevent toll fraud and brute force attacks. Firewall rules, Fail2Ban, TLS/SRTP, and context security for Asterisk.
Top free softphone apps for desktop and mobile. Linphone, MicroSIP, Zoiper compared with setup guides.
Step-by-step FreePBX trunk configuration. PJSIP settings, inbound/outbound routes, and troubleshooting.
Complete 3CX trunk configuration guide. Generic SIP trunk setup, outbound rules, and caller ID configuration.
Provider-level, PBX-level, and network-level failover strategies. Asterisk and FreePBX failover config examples.
Erlang B formulas simplified. Bandwidth per codec, QoS settings, and sizing guides for any business.
Configure voicemail.conf, voicemail-to-email, MWI indicators, and inbound call flows with SIP trunks.
Multi-level menu systems, business hours routing, DTMF handling, and dial-by-name directory setup.
Porting 100+ numbers? We waive all porting fees. Dedicated project manager, zero downtime migration.
Download free softphone apps for Windows, Mac, iOS, and Android. Compare Zoiper, Linphone, MicroSIP, and more.
Complete setup guide for Sipnetic on Android. Push notifications, codec settings, and battery optimization.
Fix one-way audio issues in VoIP. NAT traversal, firewall rules, SIP ALG, and STUN configuration explained.
Configure SIP trunks in FusionPBX/FreeSWITCH. Gateway setup, inbound/outbound routes, and dialplan examples.
Compare Yealink, Polycom, Cisco, and Grandstream. Features, pricing, and recommendations by use case.
Learn about Asterisk PBX: history, features, and how it compares to FreePBX. Getting started guide included.
Get a memorable toll-free number for your business. Prefixes explained, availability tips, and pricing.
Why businesses switch to SIP trunking. Cost savings, scalability, disaster recovery, and more.
Step-by-step guide to compile and install Asterisk 21 on Debian 13 Trixie with PJSIP and optimized settings.
Essential security practices for VoIP PBX systems. Prevent toll fraud, secure SIP, and protect your business.
Get free DID phone numbers for testing your PBX. Trial accounts, temporary numbers, and SIP testing resources.
Configure Zoiper softphone on Windows, Mac, iOS, and Android. SIP settings, codecs, and troubleshooting.
Understand E911 requirements for VoIP. Kari's Law, RAY BAUM's Act, and how to configure emergency calling.
Comparing unlimited vs metered SIP trunking. When unlimited makes sense and hidden costs to watch for.
Top Windows softphone apps compared. MicroSIP, Zoiper, 3CXPhone, and Linphone features and setup.
Top Android softphone apps compared. Zoiper, Linphone, Groundwire, and Sipnetic features and setup guides.
Set up your first SIP trunk in minutes. No contracts, pay-as-you-go pricing starting at $0.01/min.