Monitor by 2N5 or ThousandEyes for voice testing?
Choose ThousandEyes if the question is about the network between two of your own points, with SIP Server, RTP Stream and Voice Call tests between agents. Choose Monitor if the question is whether your 0800 number, your IVR or your SIP trunk answers a call from outside, with email alerts that keep going until someone takes ownership.
Monitor by 2N5 and ThousandEyes, side by side
| Feature | Monitor by 2N5 | ThousandEyes |
|---|---|---|
| Calls the public telephone network | Yes: calls SIP trunks, 0800, 0300, 4004 and landline numbers, the way a customer calls | We found no dialing to the public telephone network (PSTN) or to an IVR in the voice tests documentation (source) |
| Types of voice test | A real test call to each circuit, at the agreed pace, checking the answer, the message and the audio quality | SIP Server, RTP Stream and Voice Call tests, all agent to agent (source) |
| Tests 0800 numbers and IVRs | Yes: it checks whether the IVR answers with the right greeting, by comparing it with each number's reference recording | We found no dialing to an IVR (source) |
| How it measures voice quality | MOS-LQO measured on the received audio, against the reference recording (ITU-T P.800.1) | Not verified |
| 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 verified |
| How it alerts and escalates | Email, in tiers, until someone acknowledges with a tap on the link in the email | Not verified |
| SLA report | Yes: every month, with availability for the month and for the last 12 months | Not verified |
| In Portuguese | Yes: product, alerts and reports in Portuguese and English | Not verified |
| Managed service or do it yourself | Managed service: 2N5 registers, verifies and configures every circuit | Not verified |
| Published pricing | Yes: monthly plans in US and Canadian dollars; Enterprise on request | Not verified |
Where ThousandEyes is better
- It tests SIP and RTP from agent to agent, which helps when the question is about the network between two points of your own company, not about the public number.
- It is a Cisco product, and the voice tests are one part of it.
What is the difference between ThousandEyes and Monitor?
Who calls whom. In the voice tests of Cisco’s ThousandEyes, the call goes from one agent to another: they are SIP Server, RTP Stream and Voice Call tests. In the documentation for those tests, we found no dialing to the public telephone network (PSTN) or to an IVR. Monitor does the opposite: it calls your 0800 number, your IVR and your SIP trunk from outside, the way a customer does, and checks the answer, the message and the audio quality.
When should I choose ThousandEyes?
When the question is about the network between two points of your own company, for example between a branch and the voice server, and you already have, or want, agents installed at those points. For that, an agent-to-agent test is the right format. What else ThousandEyes measures, and how it alerts and charges, the documentation we read does not say, which is why several cells in the table are marked as not verified.
Where does Monitor fit?
In the question the internal network does not answer: does the number your customer dials answer? Monitor calls 0800, 0300 and 4004 numbers and SIP trunks from Brazil, records the reference greeting of the IVR and judges each call by whether it was answered, whether it played the right message and the MOS-LQO of the received audio; see voice quality. A confirmed failure climbs by email, tier by tier, until someone takes ownership; see alerts and escalation. Every month an SLA report arrives. See how it works.
What about network monitoring tools?
For a tool that watches networks and servers, see Monitor by 2N5 and PRTG.
How much does each one cost?
We did not verify ThousandEyes pricing. Monitor publishes monthly plans in US and Canadian dollars, set by the number of monitored channels and daily tests per channel; the Enterprise plan is on request. See how to buy and other comparisons. For the whole field, see the guide VoIP monitoring tools in Brazil.
Facts about ThousandEyes, with sources
- Cisco's ThousandEyes has SIP Server, RTP Stream and Voice Call voice tests. Source
- Those voice tests run agent to agent. Source
- In the voice tests documentation, we found no dialing to the public telephone network (PSTN) or to an IVR. Source
Each fact above was read at the source shown on October 14, 2026 and is checked again every quarter; a change shows up here with the new date.
Frequently asked questions
Does ThousandEyes call an 0800 number or an IVR?
In the ThousandEyes voice tests documentation, we found no dialing to the public telephone network (PSTN) or to an IVR: the tests it describes (SIP Server, RTP Stream and Voice Call) run agent to agent. Monitor calls 0800, 0300 and 4004 numbers the way a customer does and checks the IVR greeting.
Is ThousandEyes suited to monitoring a SIP trunk?
It has a SIP Server test and an RTP Stream test, both agent to agent. What a test like that says about the carrier's public number, we did not verify. Monitor calls the trunk from outside and shows whether a real call completes, with the voice checked.
Can I use ThousandEyes and Monitor together?
They may answer different questions. An agent-to-agent test looks at the path between two of your points; Monitor calls the number the way your customer does and alerts the team by email when the call fails. Whether the two integrate, we did not verify.