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Knowledge Base

FAQ-Why the serial port is reported like DTE if the connected cable is DCE and was tested with a lot of other cables

Publication Date:  2012-07-27  |   Views:  136  |   Downloads:  0  |   Author:  Pedro Ruiz  |   Document ID:  EKB0000281114

Contents

Issue Description

Q:
Why the serial port is reported like DTE if the connected cable is DCE and was tested with a lot of other cables?

Alarm Information

Null

Handling Process

A:

Topology:
R1(DCE) - - - - - - - - - -< > - - - - - - - - (DTE)R2
        
The port is reported like DTE with the command “display interface serial x/x” and by sure the connected cable is DCE, and the cable was changed several times by new DCE cables but the same problem happened.
If this situation is reported; the physical state of the serial connector must be checked, because in the customer x was found a router with some hole of the connector damaged that at the same time damage any cable connected, so if the new cable is connected in the damaged router, the cable is damaged too, and when is tested the cable in other router the same phenomenon will occur. 

Root Cause

Null

Suggestions

Null