Pre-Qualification Testing, Site Acceptance Testing
& Customer Site Troubleshooting

NXCheck All-IP On Premise is a professional technician tool that allows you to perform pre-qualification testing, site acceptance testing, and customer site troubleshooting. Pre-qualification tests are used to examine a network for vulnerabilities beforehand. Site acceptance tests examine the entire infrastructure, including the WAN routes, for all IP readiness and whether the carrier is complying with the SLAs (Service Level Agreements) it has promised.

If the tool is used for troubleshooting, the included troubleshooting mode can be used to quickly find out in which network segment (LAN, WAN, in-house network, etc.) the error is located. The results are reports with detailed information.

With the on-premise variant, the installation takes place on a device, there is no cloud component. A freely configurable management backend is available, the tests take place to freely placeable probes, not only to central points in the cloud. A variety of configuration options are available that allow almost any test setup.


Pre-Qualification Test

A pre-qualification test is used during the planning phase to check in advance whether the entire infrastructure, including the WAN lines, is All-IP ready. The test begins with an as-is analysis of the existing LAN structure, followed by a preliminary check of the LAN/WAN infrastructure to identify and eliminate weak points. The tool generates a meaningful report showing whether the LAN/WAN All-IP is ready or not. As a result, the report shows whether changes need to be made to the LAN/WAN infrastructure.

Site Acceptance Test

A site acceptance test checks whether the entire infrastructure, including the newly connected WAN lines, is All-IP ready after the All-IP migration and whether the carrier(s) is/are complying with the promised services and SLAs. The Site Acceptance Test serves as an acceptance test. Measurement profiles can be individually adapted to customer requirements. A positive result can serve as a guideline for future measurements/troubleshooting.


In the event of a fault, it is possible to quickly find out which network segment (LAN, WAN, in-house network, etc.) the fault is in without having to call a technician on site. It is a professional troubleshooting by targeted tests on site at the customer. By using the PESQ method, end-to-end troubleshooting is possible, as is rapid fault isolation through segmented measurements. The result is an expert report that accurately represents the error.

Technical Features

  • LAN (Port Check, DNS,DHCP, ARP, LAN Speed)
  • WAN (FTP Up- und Download, HTTP Download, Ping, Traceroute)
  • G.711 a-/μ-law
  • G.721
  • G.722
  • G.723.1
  • G.726 16/24/32/40
  • G.729a
  • GSM
  • iLBC
  • Static
  • Dynamic
  • DeltaT (min/avg/max)
  • Jitter (min/avg/max)
  • packet losses
  • Reordered Packets
  • Duplicated Packets
  • SIP
  • TCP / TLS
  • RTP
  • SRTP
  • IPv4 / IPv6
  • PESQ (ITU-T Rec. P.862)
  • E-Model (ITU-T Rec. G.107
  • R-Factor / MOS-CQE
  • Damping / Volume
  • SNR
  • background noise
  • DiffServ
  • UDP-Port-Range
  • VLAN tag (depending on network card)

  • PBX / PABX
  • SIP drink

We will be happy to consult you and look forward to hearing from you!