Monitor by 2N5 or PRTG for telephony monitoring?
Choose PRTG if you want a single dashboard for network, servers and cloud, with published pricing, a free edition and a Portuguese interface. Choose Monitor if the question is whether your SIP trunk or 0800 number completes calls with clear voice, with someone notified by email and SMS until they take ownership of the incident.
Monitor by 2N5 and Paessler PRTG, side by side
| Feature | Monitor by 2N5 | Paessler PRTG |
|---|---|---|
| Places real test calls | Yes: calls SIP trunks, 0800, 0300, 4004 and landline numbers, the way a customer calls | No: the SIP Options Ping sensor sends OPTIONS requests and records the response code and time, without setting up a call (source) |
| How it measures voice quality | MOS-LQO measured on the received audio, against the reference recording (ViSQOL) | MOS estimated from latency, jitter and packet loss (R-factor), or read from Cisco IP SLA; no analysis of the audio (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 | Yes: the trigger waits a set number of seconds with the state held before notifying (source) |
| How it alerts and escalates | Email and SMS, in tiers, until someone acknowledges | Email, SMS, push, Teams, Slack, HTTP and others; repeats the notification every N minutes. Whether acknowledging stops the escalation: not confirmed (source) |
| SLA report | Yes: every month, with availability for the month and for the last 12 months | Yes: reports scheduled by day, week, month, quarter and year, in HTML, PDF, CSV and XML (source) |
| In Portuguese | Yes: product, alerts and reports in Portuguese and English | Yes: a Brazilian website and an interface available in Portuguese (source) |
| Managed service or do it yourself | Managed service: 2N5 registers, verifies and configures every circuit | Do it yourself: software you install and configure, with a 30-day trial (source) |
| Published pricing | No: a proposal after the demo | Yes: from US$200 per month (PRTG 500) to US$1,642 per month (PRTG 10000), billed annually; Freeware edition with up to 100 sensors (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 runs on your infrastructure and monitors what your probes can reach, with no calls over the public network (source) |
Where Paessler PRTG is better
- It monitors the entire infrastructure, network, servers and cloud, in a single dashboard, not just telephony.
- It has published pricing and a Freeware edition with up to 100 sensors, enough for about 10 devices.
- It alerts through many more channels: push, Microsoft Teams, Slack, HTTP actions, syslog, SNMP traps and others, on top of email and SMS.
- It produces reports over many periods and formats, from a day to a year, in HTML, PDF, CSV and XML.
Can PRTG tell whether a SIP trunk is completing calls?
Not directly. PRTG asks the SIP server whether it responds: the SIP Options Ping sensor sends OPTIONS requests and records the response code and time, without setting up a call. The QoS sensors measure UDP packets between two probes on your network. These are good network measurements, but none of them dials a number.
Monitor does the opposite: it calls each SIP trunk, 0800, 0300, 4004 or landline number at the agreed pace, the way a customer calls, and checks whether the call completed, whether audio flowed in both directions, and whether the right party answered. A trunk can show as registered and the network as green while callers hear silence; only a call coming in from outside reveals that. See SIP trunk monitoring.
What is the difference between PRTG’s MOS and MOS-LQO?
PRTG’s MOS is estimated; Monitor’s MOS-LQO is measured. PRTG starts from an R-factor of 93, which equals MOS 4.4, and deducts for latency, jitter and packet loss, in the style of the E-model. It can also read the MOS from Cisco IP SLA. Neither path analyzes the audio.
Monitor records the audio the test call received and compares it with the number’s reference recording, using ViSQOL, and returns a score from 1 to 5. That is why it catches a wrong carrier message or audio clipped at the source, which a network estimate does not see. Details in voice quality (MOS-LQO) and in the MOS-LQO glossary entry.
What does PRTG do better?
PRTG covers far more than telephony: network, servers and cloud in a single dashboard. It has published pricing, a Freeware edition with up to 100 sensors, and a 30-day trial with no sensor limit. It alerts through many channels, from email and SMS to Teams, Slack, push, HTTP and SNMP traps, and it has a website and interface in Portuguese. If you need general infrastructure monitoring, PRTG is built for that.
How does each one confirm a failure and notify the team?
Both wait before alerting. In PRTG, the notification trigger can require the state to hold for a number of seconds, and the notification can repeat every so many minutes. Whether an acknowledgment stops that repetition is something we could not confirm in the manual.
In Monitor, a call that fails is repeated, and only consecutive failures, four by default, open an incident. The incident notifies the first tier by email and SMS and moves up tier by tier until someone acknowledges with a tap on the link in the SMS. See alerts and escalation.
What about SLA reports?
Both have them. PRTG schedules reports by day, week, month, quarter and year, in HTML, PDF, CSV and XML. 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. The difference is where the data comes from: in Monitor, availability comes from the test calls. See SLA reports.
How much does each one cost?
PRTG publishes its prices: on the Brazilian page, read on 2026-10-07, they run from US$200 per month (PRTG 500) to US$1,642 per month (PRTG 10000), billed annually. Monitor has no list price: pricing is per monitored circuit and service, and 2N5 sends a proposal after a demo on your own numbers. See how to buy.
When does it make sense to use both?
When the company already uses PRTG for its infrastructure and needs to prove that its phone service is up. PRTG keeps watching the network; Monitor calls the voice circuits, as a service managed by 2N5. Other comparisons are under comparisons.
Facts about Paessler PRTG, with sources
- The SIP Options Ping sensor sends authentication and OPTIONS requests to the SIP server and records the response code and time. Source
- PRTG's MOS starts from an R-factor of 93, equivalent to MOS 4.4, and is reduced by latency, jitter and packet loss. Source
- The QoS sensors send a series of UDP packets from a source probe to a target probe. Source
- On the Brazilian pricing page, read on 2026-10-07, PRTG 500 costs US$200 per month, billed annually, and the Freeware edition includes up to 100 sensors. Source
- The PRTG web interface can be used in Portuguese. 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 PRTG place test calls to an 0800 number?
Not according to the manual pages we read. The SIP Options Ping sensor sends OPTIONS requests to the SIP server and records the response code and time, without setting up a call or carrying audio. The QoS sensors exchange UDP packets between two probes. To know whether the 0800 number answers with the right message, you need a real call, which is what Monitor places.
Is PRTG's MOS the same as Monitor's MOS-LQO?
No. PRTG calculates an estimated MOS from latency, jitter and packet loss, starting from an R-factor of 93, or reads the MOS from Cisco IP SLA. Monitor measures MOS-LQO on the audio each test call received, compared with the reference recording, using ViSQOL. One looks at the network; the other listens to the voice that arrived.
Can PRTG and Monitor be used together?
Yes. PRTG keeps watching the network, servers and cloud, and Monitor calls the voice circuits and notifies your escalation ladder by email and SMS. Because Monitor calls numbers the way a customer does, it does not depend on what PRTG, the PBX or the network report about themselves.