Tools
VoIP Tools
Professional VoIP diagnostics for MSPs, providers, and IT teams.
VoIP Quality Test
Real-time voice quality analysis over an actual voice media path. Measures jitter, packet loss, latency, and MOS score using synthetic audio streams with proper codec encoding and real packet timing. No microphone required.
Free to run — no account required. Up to 4 simultaneous calls, up to 3 minutes.
Open access
Carrier Lookup
Look up any phone number to find the carrier, line type (VoIP, mobile, landline), porting status, and location.
SIP Response Codes
Searchable reference for all SIP status codes with plain-English explanations and troubleshooting steps.
Bandwidth Calculator
Calculate VoIP bandwidth requirements based on the number of concurrent calls and your codec. Covers G.711, G.729, Opus, and more.
MOS Score Explorer
Select a codec, slide the MOS score, and see what each level means for real calls. Includes quality tiers, perceptual descriptions, and network condition estimates.
Registered access
These tools require a free account. Create one in seconds to get started.
PCAP Analyzer
Upload a pcap or pcapng capture for automated VoIP analysis. Extracts RTP streams, maps SIP dialogs, and generates per-stream quality metrics.
SIP Call Stories
Upload a packet capture, pick a call, and get its story in plain English: what happened, what failed, and what to check next.
Call Flow Designer
Design call flows visually. Map out auto-attendants, queues, ring groups, and extensions. Auto-allocate extension numbers and export print-ready diagrams.