Monitor by 2N5 or VoIPmonitor for telephony monitoring?
Choose VoIPmonitor if you want to analyze every real call crossing your network, with KPIs such as ASR and PDD, fraud detection and published pricing. Choose Monitor if you need to know, even in the middle of the night, whether each SIP trunk or 0800 number completes calls with clear voice, as a managed service.
Monitor by 2N5 and VoIPmonitor, side by side
| Feature | Monitor by 2N5 | VoIPmonitor |
|---|---|---|
| Places real test calls | Yes: calls SIP trunks, 0800, 0300, 4004 and landline numbers, the way a customer calls | No: it analyzes traffic passively, through a mirrored port (SPAN) or mirroring on the SBC (source) |
| How it measures voice quality | MOS-LQO measured on the received audio, against the reference recording (ViSQOL) | MOS calculated with the ITU-T G.107 E-model, from the jitter, packet loss, delay and RTCP of the captured calls (source) |
| Confirms the failure before alerting | Yes: it repeats the call, and only four failures in a row by default (the first plus three retries) open an incident | Not confirmed |
| How it alerts and escalates | Email and SMS, in tiers, until someone acknowledges | Email, SMS, webhook or integrations, on KPI thresholds (ASR, NER, PDD and others), timeouts and trend anomalies; escalation and acknowledgment: not confirmed (source) |
| SLA report | Yes: every month, with availability for the month and for the last 12 months | Daily, weekly and monthly scheduled reports (RTP, CPS and CDR summaries) by email; availability report: not confirmed (source) |
| In Portuguese | Yes: product, alerts and reports in Portuguese and English | Not confirmed |
| Managed service or do it yourself | Managed service: 2N5 registers, verifies and configures every circuit | Do it yourself: on your own server, or in the cloud, with the sniffer installed by you and the interface and database hosted by them (source) |
| Published pricing | No: a proposal after the demo | Yes: on your own server, from US$45 per month (10 channels) to US$4,895 per month (50,000 channels); in the cloud, from US$22 per month (3 channels); 30 days free (source) |
| Coverage in Brazil | Yes: 0800, 0300, 4004 and landline numbers, with any carrier; SLA measured over the year, as Brazilian contracts do | Not applicable: it analyzes the traffic that crosses your own network (source) |
Where VoIPmonitor is better
- It analyzes every real call crossing your network, not just test calls, without affecting network performance.
- It measures traffic KPIs such as CPS, ASR, NER, SEER, ACD and PDD, and detects fraud, SIP attacks and trend anomalies.
- It has published per-channel pricing, a 30-day trial with every feature, and an open-source sniffer.
- In the version installed on your own server, no data leaves your network, and retention is unlimited.
What is the difference between VoIPmonitor and Monitor by 2N5?
One listens, the other calls. VoIPmonitor passively analyzes the calls crossing your network, captured through a mirrored port (SPAN) or the SBC’s packet mirroring, without affecting network performance. Monitor places its own test calls, from 2N5’s platform, to each SIP trunk, 0800, 0300, 4004 or landline number, the way a customer calls.
The two approaches answer different questions. A passive tool tells you how the calls that happened went. A test call tells you whether the number answers right now, even when nobody is calling, in the middle of the night for example. See SIP trunk monitoring.
What does VoIPmonitor do better?
It sees every real call on your network, not just test calls. It measures traffic KPIs such as CPS, ASR, NER, SEER, ACD and PDD, alerts on RTP timeouts and stuck calls, and detects fraud, SIP attacks and trend anomalies. It has published per-channel pricing, a 30-day trial with every feature, an open-source sniffer and, in the version installed on your own server, no data leaves your network. For anyone running a high-traffic SIP platform, that is far more visibility than test calls give.
How does each one measure voice quality?
VoIPmonitor calculates MOS with the ITU-T G.107 E-model, from jitter, packet loss, delay and RTCP. It is an estimate built from network figures, applied to every captured call.
Monitor measures MOS-LQO: it records the audio the test call received and compares it with the number’s reference recording, using ViSQOL. That is why it notices a wrong carrier message or audio clipped at the source, which a network estimate does not see. See voice quality (MOS-LQO) and the ViSQOL glossary entry.
How does each one decide to alert?
VoIPmonitor alerts by email, SMS, webhook or integrations, based on rules over the CDR data, KPI thresholds, timeouts and anomalies. Whether it repeats the check before alerting, escalates, or stops when someone acknowledges is something we could not confirm on its website.
In Monitor, a call that fails is repeated, and only consecutive failures, four by default, open an incident with the SIP code and the Q.850 cause. The incident notifies the first tier by email and SMS and moves up until someone acknowledges with a tap. See alerts and escalation.
What about SLA reports?
VoIPmonitor schedules daily, weekly and monthly summaries of RTP, CPS and CDR, sent by email; an availability report is not in the documentation we read. Monitor sends a report every month with availability for the month and for the last 12 months, the incidents, and the time until someone took ownership, in Portuguese or English. See SLA reports.
How much does each one cost?
VoIPmonitor publishes its prices, read on 2026-10-07: on your own server, from US$45 per month for 10 channels to US$4,895 per month for 50,000 channels; in the cloud, from US$22 per month for 3 channels. A channel is one concurrent call at peak time. Monitor has no list price: 2N5 sends a proposal after a demo on your own numbers. See how to buy.
When does it make sense to use both?
When you want to see your customers’ real calls and also prove that every number answers at any hour. VoIPmonitor sits on your network; Monitor calls from outside, as a service managed by 2N5. Other comparisons are under comparisons.
Facts about VoIPmonitor, with sources
- VoIPmonitor analyzes SIP traffic passively, through a mirrored port (SPAN) or through packet mirroring on AudioCodes, Ribbon, Oracle and Cisco CUBE SBCs. Source
- VoIPmonitor's MOS is calculated with the ITU-T G.107 E-model, on a scale from 1 to 5. Source
- VoIPmonitor processes the SIP OPTIONS, SUBSCRIBE and NOTIFY messages that cross the network, with statistics similar to a ping's. Source
- VoIPmonitor alerts go out by email, SMS, webhook or its own integrations, based on KPI thresholds, timeouts and trend anomalies. Source
- On the pricing page, read on 2026-10-07, a channel is one concurrent call at peak time, and the license on your own server starts at US$45 per month for 10 channels. Source
- The documented scheduled reports are daily, weekly and monthly, sent by email. Source
Each fact above was read at the source shown on October 7, 2026 and is checked again every quarter; a change shows up here with the new date.
Frequently asked questions
Does VoIPmonitor place test calls?
Not according to the pages we read on the VoIPmonitor website. It passively analyzes the traffic on your network, captured through a mirrored port or the SBC, and even the SIP OPTIONS messages it processes are ones already crossing the network. Monitor does the opposite: it calls each voice circuit itself, the way a customer calls, at the agreed pace.
Do VoIPmonitor's MOS and Monitor's MOS-LQO measure the same thing?
No. VoIPmonitor calculates MOS with the ITU-T G.107 E-model, from jitter, packet loss and delay. Monitor records the audio the test call received and compares it with the number's reference recording, using ViSQOL. One estimates from the network; the other listens to the voice that arrived.
Is it worth using both?
It can be. VoIPmonitor shows how your customers' real calls are doing when there is traffic. Monitor calls at the agreed pace, including when nobody is calling, and notifies the escalation ladder by email and SMS until someone takes ownership. Monitor never touches your customers' calls.