Enterprise SIP Testing Platform
Every Feature You Need
From 70+ real-time quality metrics to mass SIP stress testing, continuous monitoring, and public status pages. One platform to test, monitor, and optimize your voice infrastructure.
Quality Analytics
70+ Metrics Per Endpoint Per Second.
Every second. Every direction. Every codec.
The deepest quality visibility of any SIP testing platform. Every metric follows an RFC or ITU-T standard -- no guessing, no estimation, no shortcuts.
E-Model MOS (G.107)
ITU-T G.107 E-Model with codec-specific Ie-eff values from G.113. Real computational model, not estimation.
Video MOS (P.1201/P.1203)
ITU-T parametric video quality model factoring resolution, FPS, bitrate, freeze events, and codec.
Dual-Direction Collection
Separate SEND and RECV collectors per endpoint. Each direction has its own metrics stream and SSRC validation.
Jitter Buffer Analysis
Buffer delay, target level, late arrivals, duplicates, and retransmission success rate -- all measured, not estimated.
Packet Sequence Analysis
Out-of-order packets, duplicates, sequence gaps, jumps, and SSRC resets tracked per second.
Clock Drift/Skew (PPM)
EWMA-smoothed clock drift detection in parts-per-million. Catches infrastructure timing issues other tools miss.
Audio Level Analysis
RMS dBov, voice activity ratio, noise floor estimation, and comfort noise detection.
Opus Codec Metrics
Bandwidth mode, decoder gain, packet loss percentage, and frame duration for Opus streams.
Video Quality Metrics
Bitrate, FPS, QP average, resolution tracking, freeze/artifact count and duration, decoder error count.
RTCP SR/RR/FIR/PLI
Full RTCP report processing: Sender Reports, Receiver Reports, FIR, PLI, and SLI feedback.
Network Conditions
Bandwidth estimation, ICE candidate type tracking, and transport-level indicators.
Call Timing (PDD/ASR/NER)
Post-Dial Delay, Answer Seizure Ratio, Network Effectiveness Ratio, setup time, ring time, and time-to-first-media.
Every Metric, Documented
74 metrics collected per endpoint, per second, per direction. Click a category to explore.
With SEND + RECV directions per endpoint, each test generates 70+ data points every second.
Start MeasuringSIP Stress Testing
Mass endpoint testing from 10 to 10,000+ simultaneous calls.
Push your SIP infrastructure to its limits with configurable endpoint counts, full SIP method coverage, multiple authentication modes, and real-time SIP message capture with ladder diagrams.
Mass Endpoint Testing
Scale from 10 to 10,000+ simultaneous endpoints. Configurable ramp-up and duration.
Full SIP Method Support
REGISTER, INVITE, ACK, BYE, CANCEL, OPTIONS, UPDATE, REFER, MESSAGE, INFO, NOTIFY, SUBSCRIBE.
Digest Authentication
RFC 2617 digest auth supporting both UAS and Proxy authentication challenges.
HMAC Credentials
Ephemeral HMAC credential authentication for turn-key integration with modern SIP platforms.
SIP Message Capture
Full SIP message capture with visual ladder diagrams. Inspect every header, every response.
Configurable Duration
Set precise call duration and endpoint count. Control exactly how long and how hard you test.
DNS Auto-Discovery (RFC 3263)
NAPTR → SRV → A/AAAA resolution for automatic transport, host, and port discovery. Standards-compliant SIP routing.
Outbound Proxy
Route INVITE requests through a SIP proxy via RFC 3261 Route header. Same credentials for proxy auth (407).
Media Engine
7 codecs. Full SDP negotiation. Real media, not silence.
Send and receive actual audio and video with proper codec negotiation per RFC 3264. Configure bitrate, resolution, FPS, and media direction per endpoint.
Audio Codecs
Video Codecs
Full FMTP Support
Opus bandwidth, maxplaybackrate. H.264 profile-level-id, packetization-mode. All configurable.
SDP Negotiation (RFC 3264)
Standards-compliant offer/answer model with proper codec ordering and attribute handling.
Media Direction Control
sendrecv, sendonly, recvonly, inactive. Full control over media flow per m-line.
RTP Profiles
AVP, AVPF, SAVP, SAVPF, and UDP/TLS variants. Match your infrastructure's security profile.
File-Based Playback
Play audio and video files from cloud storage. Test with real content, not synthetic tones.
Recording Capture
Capture call recordings for post-test analysis and compliance verification.
Bitrate Configuration
Per-codec bitrate control. Audio: 8-64 kbps. Video: 256 kbps to 10 Mbps+.
Resolution & FPS Config
QVGA to 4K resolution. 15 to 60 FPS. Configure per-test to match your use case.
Continuous Monitoring
Probes that watch your infrastructure 24/7.
Set up CALLER (active) and CALLEE (passive) probes with interval or cron scheduling. Define quality thresholds, get webhook notifications on status changes, and track health with sliding window evaluation.
CALLER + CALLEE Modes
Active probes that place calls (CALLER) and passive probes that receive them (CALLEE). Cover both directions.
Flexible Scheduling
Interval-based (every 5+ minutes) or cron expressions. Timezone-aware with IANA timezone support.
Quality Thresholds
Set green/orange/red zones for MOS, jitter, packet loss, RTT, setup time, ring time, and connect time.
Sliding Window Status
HEALTHY, DEGRADED, or UNHEALTHY based on the worst result in the last 5 checks. No single-check false alarms.
HMAC-SHA256 Webhooks
Cryptographically signed webhook payloads with timing-safe verification. Replay prevention included.
Retry & Auto-Disable
Exponential backoff retries (5 attempts). Auto-disables after 10+ consecutive delivery failures.
SLA Enforcement & Status Pages
Public status pages your customers can trust.
Share real-time infrastructure health with customers via token-based public pages. No login required. Rolling uptime, color-coded timelines, and embeddable status badges.
Token-Based Public Access
256-bit hex tokens grant read-only access. No account needed. Regenerate to revoke.
Multi-Probe Dashboards
Combine multiple probes into one status page with custom ordering and per-probe visibility control.
24h Rolling Uptime
Real-time uptime percentage calculated from the last 24 hours of probe check data.
Color-Coded Timeline
Visual timeline of the last 50 checks. Green, amber, red at a glance.
Embeddable Status Badges
Drop a status badge into your website or documentation. Always up to date.
IVR & DTMF Testing
Test interactive voice menus end to end.
Generate and detect DTMF tones per RFC 4733. Build IVR test scenarios that navigate your call menus and validate each branch. Ensure your customers reach the right destination.
DTMF Generation & Detection
RFC 4733 compliant tone generation and detection. Test keypad interactions reliably.
IVR Scenario Engine
Define call flow scenarios with branching logic. Validate that each menu option routes correctly.
Menu Validation
Automated verification of interactive menus. Detect broken branches, dead ends, and routing errors.
API & CLI Integration
Automate everything. Test from your pipeline.
Full REST API with OpenAPI documentation. A CLI tool that fits into CI/CD pipelines. API key authentication, bidirectional testing with auto-pairing, and programmatic access to every feature.
REST API
Full OpenAPI-documented REST API. Create tests, read metrics, manage probes -- all programmatically.
CLI Tool
callmeter CLI for CI/CD pipeline integration. Run tests, check results, gate deployments.
API Key Authentication
Scoped API keys with role-based permissions. Rotate and revoke without downtime.
Bidirectional Testing
Auto-pairing of caller and callee endpoints for end-to-end quality validation.
Simulate Real-World Network Conditions
Test how your infrastructure handles degraded network conditions with programmable impairment controls.
Not simple tc/netem rules -- realistic sporadic patterns that mirror actual network behavior.
Packet Loss Injection
Introduce controlled packet loss from 0.1% to 50%.
Jitter Simulation
Add variable delay patterns mimicking real-world conditions.
Latency Control
Inject fixed or variable latency from 1ms to 2000ms.
Bandwidth Throttling
Limit bandwidth to simulate constrained links.
Realistic Patterns
Sporadic burst patterns, not uniform distribution.
Per-Endpoint Config
Different impairment profiles per call endpoint.
We Don't Just Tell You Quality Dropped -- We Tell You Why
An AI assistant with read-only access to all your data -- test runs, probes, metrics, SIP messages.
Powered by a local model owned and run by CallMeter -- not OpenAI, not any third party. It cannot perform any action, only investigate. Not trained on customer data. Can investigate any test run or probe, and generate detailed reports.
True delete: deleting chat sessions permanently removes all data. Your infrastructure details stay yours.
Root Cause Analysis
Ask why MOS dropped, get SIP traces + packet analysis + codec behavior.
Read-Only by Design
Cannot modify, delete, or trigger anything. Pure investigation.
Local Model
Runs on CallMeter infrastructure. No third-party API. Your data never leaves.
Privacy First
Not trained on customer data. True delete erases everything permanently.
Full Context
Access to test runs, probes, metrics history, SIP message flows, RTCP reports.
Detailed Reports
Generate shareable investigation reports from any conversation.
Platform & Collaboration
Built for teams. Cloud or on-premise.
Multi-tenant organizations with 5-level RBAC. Cloud-managed and user-owned workers with real-time bidirectional streaming. Flexible billing, team invitations, and email notifications.
Cloud-Managed Workers
Regional deployment with automatic load balancing. No infrastructure to manage.
User-Owned Workers
Run workers in your own datacenter with Docker. Token-based auth, your network, your rules.
Real-Time Streaming
Bidirectional streaming with heartbeat monitoring. Live metrics and status from every worker.
Multi-Tenant Orgs
Isolated organizations with separate billing, workers, and data. Built for enterprise structure.
5-Level RBAC
Viewer, Tester, Editor, Admin, Owner. Granular control over who can do what.
Team Invitations
Invite team members with role assignment and expiration. Onboard your team in minutes.
Flexible Billing
Plans that scale with your needs. Usage tracking for audio and video minutes.
Email Notifications
Customizable email templates for alerts, invitations, and billing events.
Usage Quotas
Set per-user and per-project limits on test runs, minutes, and workers. Control costs within your organization.
Resource Controls
Admins define who can use which workers, how many concurrent tests, and monthly minute caps.
Ready to Test Your Infrastructure?
See how CallMeter fits your testing workflow.