Tools
VoIP tools
Choose the task you want to complete. Each tool gives a quick result and then points you to more detailed guidance.
Most worksheets run in your browser. Product comparison and compatibility selections are sent to Phone Guides in the page URL so results can be shared; they do not ask for an email address.
Product compatibility checker
Build a phone setup and review sourced compatibility, conditions, and evidence gaps.
Compare desk phones
Compare exact models and inspect recorded differences.
Bandwidth calculator
Estimate how much connection capacity your calls need.
Call-quality indicator
Check whether latency, jitter, and packet loss may affect calls.
SIP response-code lookup
Enter a SIP code and see what it means and what to check first.
VoIP port reference
Find the common network ports used by VoIP services.
Codec reference
Compare four common voice codecs and their bandwidth needs.
Dial-plan worksheet
Write simple call-routing rules and copy them for later use.
Deployment readiness checklist
Check the basics before a VoIP test or rollout.
Number formatter and pattern tester
Format an international number and test it against simple dial patterns.
Firewall and NAT readiness checker
Review common port, SIP ALG, firewall and NAT risks before a change.
VLAN and QoS planner
Plan voice addresses and bandwidth, then review common VLAN and QoS gaps.
SIP trunk deployment worksheet
Check the main decisions before testing or moving a SIP trunk.
Before you change a live system
Treat each result as a starting point. Your provider, equipment, codec settings, security settings, and local rules may change what you need. Test the result and check the linked guidance before changing a live service.