#Rj45 loopback plug install
#Rj45 loopback plug serial
#Rj45 loopback plug software
#Rj45 loopback plug password

#Rj45 loopback plug software

Whether it is an internal or external CSU/DSU, you can do both software and hardware loopbacks back towards the router.

#Rj45 loopback plug serial

Two kinds of loopback tests can be used to isolate problems on the serial link: software loopbacks and hardware plug loopbacks. Refer to Cisco Technical Tips Conventions for more information on document conventions.

The information in this document is based on Cisco IOS® Software Release 12.0. There are no specific requirements for this document. Then proceed on to loopback tests that involve the telco or provider. Begin loopback tests on the customer premises with channel service unit/data service unit (CSU/DSU) loopback tests. Loopback tests allow you to isolate pieces of the circuit, and test them separately. The test will repeat indefinitely.When a serial line does not come up as it must, the best way to troubleshoot the circuit is to perform loopback tests.For ports 40 through 48, type in loopback -e eth0 /dev/port4.For ports 30 through 39, type in loopback -e eth0 /dev/port3.For ports 20 through 29, type in loopback -e eth0 /dev/port2.For ports 10 through 19, type in loopback -e eth0 /dev/port1.The screen will then show 7 columns for ports 10 through 16 and one for Ethernet To test ports 10 through 16 on the CM4116 you need to type loopback -e eth0 /dev/port1.The screen will show 9 columns for serial loopback and one for Ethernet: To invoke the inbuilt loopback diagnostics type in loopback -e eth0 /dev/port0 then press 'return'.

#Rj45 loopback plug install

Install the ELB on the Ethernet RJ45 socket and an SLB plug onto each serial RJ-45 sockets.

You should now see the command line prompt which is a hash (#)

#Rj45 loopback plug password

Enter username 'root' and password 'default'. The console server will request a username and password.

Log on to the console server by pressing 'return' a few times.

If you are using 'HyperTerminal' or a similar program running on a Windows PC as the terminal device, then the cable is made up from a Cat5 UTP (440016) cable and two DB-9 to RJ-45 adapters (319001)

Plug a serial cable between the console server local DB-9 port and terminal device.

Power up the console server and configure the serial connection of the 'terminal' device/program you are using to 9600bps, 8 data bits, no parity and one stop bit.

custom made RJ-45 Ethernet loopback plug (refer the ELB section at end of this faq).

custom made R-45 serial loopback plugs (the SLB section at end of this faq shows the SLB required for a console server with Opengear classic pinout).

To undertake these tests you'll need to have at hand: This test enables you to test the console server serial ports and your serial cabling. The Loopback Test also undertakes an Ethernet loopback that senses the data transmitted is received properly. The loopback program senses that data sent is received properly and that signals set and received properly. When undertaking a Loopback Test, each of the serial ports loop data transmitted to data received, RTS to CTS, and DTR to DSR + DCD.

For example the Serial Ports panel will then show you the status of each serial port.Īlternately you can get this serail port status information from the command line by typing pmshell –signals –l port1 Hardware loopback testing the portsĮach console server has Loopback Test facilities built in. You can verify that devices are attached correctly to ports by navigating to the web interface and selecting Status: Statistics.