naxcanada.blogg.se - Loopback cable analog devices

The components you should try to eliminate as problematic include the VWIC (card and port) and the cable run (up to the SmartJack). Progress in stages toward the telco point of demarcation (demarc). Move the loopback testing out to the next component, and repeat Steps 1-3.If the testing is successful, it eliminates the VWIC as the problem component. Start at the Voice/WAN Interface Card (VWIC) on the Cisco gateway.The basic idea behind loopback testing is: Loopback testing is a very effective way to isolate a failing T1 (or E1). Refer to Important Information on Debug Commands before you use debug commands. Use the Output Interpreter Tool in order to view an analysis of show command output. The Output Interpreter Tool ( registered customers only) supports certain show commands.

Use the Command Lookup Tool ( registered customers only) in order to obtain more information on the commands used in this document. How can there be efficient and effective progress on the issue? This document describes an important and useful troubleshooting method, known as loopback testing, and covers various loopback testing techniques. The Cisco Technical Assistance Center (TAC) does not directly deal with third party organizations.

The problem could be mismatched configuration across the telco interface, which leads to clock slips, line/path violations, a damaged cable, a bad card, or telco issues.

Multiple components impact the status of the ISDN Primary Rate Interface (PRI) or T1 CAS circuit.

Faulty components might reside in several places - for example, within the Cisco domain or in a third-party (telco) domain.

A common issue in VoIP networks with a digital interface connection to a telecommunications provider (telco) is that the ISDN or channel associated signaling (CAS) circuit does not come up or stay up.