Voice Quality Management
Continuous ASR, ACD, PDD, MOS and CLI measurement across every route and trunk, active route testing, SLA reporting and proactive alerts - so quality problems are found by us before they are found by your customers.
5 min
KPI sampling interval
60+
Countries with test numbers
24×7
NOC route watch
What is Voice Quality Management?
Voice Quality Management turns the measurement systems inside Dollu's voice core into a service you can rely on and report against. Every call across our platform - wholesale termination, origination, SIP trunking or bilateral interconnect - contributes signalling and media statistics to a per-route, per-trunk and per-destination quality model that is refreshed every five minutes and retained for trend analysis.
Passive monitoring captures answer-seizure ratio, average call duration, post-dial delay, network-effectiveness ratio and SIP response distributions from signalling, and packet loss, jitter, latency and estimated MOS from RTP and RTCP. Active testing complements it: a scheduled test-call generator places calls to receiving numbers in 60+ countries, records audio, verifies CLI presentation and measures PDD on chosen routes, so silent failures such as a supplier substituting CLI or a destination playing an announcement are caught without waiting for traffic to expose them.
The service is delivered through dashboards, alerts and people. You set thresholds per destination or per trunk, receive alerts by email, webhook or portal when they are breached, and get an SLA report each month that shows achieved versus committed quality per route. Behind that, NOC engineers watch the same screens around the clock, open tickets with upstream operators when a destination degrades and feed confirmed route changes back into routing so traffic moves off bad supply automatically.
Quality Management is included with committed-volume termination and SIP trunking and is also available as a standalone service for operators who terminate elsewhere but want an independent testing and monitoring layer over their own suppliers, with results delivered by API into their own switch or BI stack.
Wholesale routing: how a call finds its route.
Why choose Dollu for voice quality.
The advantages of buying from a carrier that owns its network, interconnects and operations - rather than a reseller.
Problems found before complaints
Threshold alerts and active testing surface degraded routes, CLI substitution and false answers within minutes rather than after a customer escalation.
Evidence for your own SLAs
Route-level KPI history and monthly SLA reports give you the data to hold suppliers to account and to prove quality to your downstream customers.
Fewer disputes, faster fixes
Shared, timestamped KPIs and test-call recordings shorten the argument with an upstream operator and get the route repaired sooner.
Independent view of any supplier
Run active tests across your own supplier portfolio, not just Dollu routes, and compare vendors on the same measurements.
Quality that steers traffic
Because measurement and routing share one engine, a confirmed problem moves traffic automatically instead of waiting for a human to update a route table.
Capabilities in detail.
Everything included with Voice Quality Management - the platform features, options and controls you get from day one.
- 01
Passive KPI monitoring
ASR, ACD, PDD, NER, SIP response-code distribution and CPS from signalling; packet loss, jitter, latency and estimated MOS from RTP/RTCP, aggregated per route, trunk, prefix and customer.
- 02
Active route testing
Scheduled or on-demand test calls to receiving numbers in 60+ countries on any route; audio recording, ringback and answer detection, PDD measurement and codec logging per attempt.
- 03
CLI verification
Detect CLI substitution, stripping or spoofing by comparing presented CLI at the receiving number against sent CLI, per route and per destination, with historical pass rates.
- 04
False-answer and announcement detection
Identify routes returning early answer, fake ringback or network announcements instead of connecting, using audio analysis of test calls and ACD anomalies in live traffic.
- 05
Thresholds and alerting
Per-destination, per-trunk and per-customer thresholds on any KPI, with dead-band and duration logic; alerts by email, webhook, SMS or portal; escalation to NOC.
- 06
SLA reporting
Monthly and on-demand reports of achieved versus committed ASR, ACD, PDD, MOS and CLI delivery per route, with incident annotations and credit calculations where SLAs apply.
- 07
Root-cause and carrier liaison
NOC investigation with SIP ladder diagrams and media statistics; tickets opened and tracked with upstream operators; post-incident summaries shared with you.
- 08
Data access
REST API and SFTP for KPIs, test results, alerts and reports; webhooks for threshold events; exports formatted for common BI and switch-vendor tools.
How it works.
From first conversation to live traffic - a tracked, engineer-led onboarding with a named owner at every step.
- Step 01
Baseline
We enable monitoring on your trunks and routes and run an initial test campaign across your key destinations to establish quality baselines.
- Step 02
Set thresholds
Agree per-destination and per-trunk thresholds, alert channels and escalation paths. Test schedules are configured for the routes that matter most.
- Step 03
Monitor and alert
Dashboards, alerts and NOC watch run continuously. Confirmed degradations trigger routing changes and carrier tickets, and you are kept informed.
- Step 04
Report and review
Monthly SLA reports and a quality review with your account manager identify chronic routes, supplier issues and threshold adjustments.
Premium, Standard or Wholesale.
Every destination on the Dollu rate deck is offered in up to three quality tiers. Pick per destination - or per customer - and mix them on one interconnect.
| Dimension | Premium (CLI-guaranteed) | Standard | Wholesale |
|---|---|---|---|
| CLI delivery | Guaranteed - the originating number is delivered intact to the called party | Best effort - CLI is normally delivered but not contractually guaranteed | Not guaranteed - CLI may be withheld or replaced on some routes |
| Route type | Direct operator interconnects and Tier-1 partners only | Direct and vetted partner routes, quality-steered in real time | Least-cost blended routes, swapped freely to hold the price |
| Typical ASR band | Highest | High | Variable |
| PDD | Lowest | Low | Variable - can rise on multi-hop transit |
| Best for | Contact centres, retail and enterprise traffic, OTP voice calls - anywhere the called party must see who is calling | Business traffic where quality matters and CLI is helpful but not mandatory | High-volume carrier, dialler and call-centre traffic where price per minute dominates |
| SLA | Per-destination ASR, ACD and PDD targets with service credits | Quality targets monitored and reported; credits on core availability | Core availability only; route quality is managed, not guaranteed |
| Price position | Highest | Mid | Lowest |
All three tiers ride the same SIP interconnect, portal and CDRs - the tier is chosen per destination prefix, so you can move traffic between them without a new set-up.
Who uses this and why.
Typical deployments across carriers, enterprises, platforms and contact centres.
Wholesale carriers
Independent measurement of every supplier route with CLI verification and false-answer detection to protect margin and reputation.
Contact centres
Track PDD, answer rates and audio quality per campaign country and get alerts before agent productivity or compliance suffers.
UCaaS and CPaaS providers
Per-customer and per-trunk quality dashboards and SLA reports you can pass through to your own enterprise customers.
Enterprises with SIP trunks
Trunk-level MOS, jitter and PDD monitoring with alerts to your IT team and NOC-led resolution when a site's voice quality drops.
Regulators and audit teams
Timestamped KPI history, test recordings and SLA reports that support regulatory quality-of-service reporting and audits.
Technical & commercial specifications.
Key parameters at a glance. Ask us for the full service description and SLA document.
| Passive KPIs | ASR, ACD, PDD, NER, SIP response codes, CPS, packet loss, jitter, latency, MOS |
|---|---|
| Sampling | Every 5 minutes per route and trunk; raw per-call data retained 90 days |
| Active testing | Test numbers in 60+ countries; scheduled or on-demand; audio capture |
| CLI checks | Presented versus sent CLI per route; substitution and stripping detection |
| Alerting | Email, webhook, SMS, portal; per-destination and per-trunk thresholds |
| Reporting | Monthly SLA reports; on-demand exports; incident annotations |
| Retention | Aggregated KPIs 24 months; test recordings 30 days |
| Integration | REST API, webhooks, SFTP; BI and switch-vendor export formats |
| Availability | Included with committed-volume services; standalone subscription available |
| Support | 24×7 NOC route watch; P1 response ≤ 15 min; monthly quality review |
How Voice & Wholesale is priced.
Wholesale voice is priced from an A–Z rate deck: a rate per destination and breakout for each quality tier, billed on connected seconds. There are no setup or port fees on SIP interconnects.
We publish the model, not a public rate card - actual rates depend on destination, route class, volume and regulatory cost. See how every Dollu service is priced.
- A–Z rate deck in USD, EUR, GBP or INR
- Premium (CLI), Standard and Wholesale tiers per destination
- 1/1 billing on most destinations; 60/60 flagged on the deck
- Volume tiers from 1M minutes a month; bilateral and swap for carriers
- Rate increases with at least 7 days’ notice; decreases immediate
- Billing
- Prepaid (online top-up, auto-recharge) or postpaid net-15/30 after credit review; per-second increments
- Commitment
- None - month-to-month usage; optional volume commitments unlock better tiers
230+ destinations, A–Z.
Every country on the rate deck, in Premium, Standard and Wholesale tiers where the market supports them - over 600 direct carrier interconnects and Tier-1 partners. Country guides cover the destinations with the most traffic.
Voice Quality - your questions answered.
The questions customers and carriers ask us most often before they interconnect. If yours is not here, our team answers within one business day.
Still have a question?
Ask our solutions teamRelated services.
Services customers commonly combine with Voice Quality Management.
Put your routes under continuous watch.
Send us the destinations and trunks you care about and we will run a baseline test campaign and share the results within three business days.
