Mitel sx-200 User Manual

If a network analyzer is required to debug an IP Phone it will be necessary 

to use an Ethernet tap to ensure that the port settings are not compromised 

or changed. For example: using a shared hub to allow the analyzer to “see” 

packets being delivered to a Layer 2 port will change connectivity to the 

port to 10 MB half-duplex.

If the analyzer indicates there are excessive collisions:

• check for duplex mismatch problems at the Ethernet port on 

SX-200 ICP. The Layer 2 port attached to SX-200 ICP should be set 

to 100 Full and not auto.

• check that for dual-port phones the NIC card of the attached PC to the 

IP set is not 10 MB half-duplex. The NIC card should be 100 MB 

full-duplex.

• for CRC errors: check if there is a faulty NIC card or flow-control.

• if there are excessive runt frames, check for bad cables, duplex 

mismatches or bad PC NIC.

For IP Phone network connectivity problems, identify the path between two 

end devices (example: IP Phone and SX-200 ICP) by doing the following:

• Execute a ping test from an IP Phone. Do this when the phone is 

unable to register with its DHCP server (either the one in SX-200 ICP 

or an external one if that is how the network is set up).

- Disconnect power from the phone.
- Reconnect power WHILE pressing the Superkey button.
- Press the “v” (volume down key) until INPUT IP Address. 
- Enter an IP address on the same subnet as the device you will be 

pinging (avoid conflicting addresses). 

- If a mistake is made, press the “^” (volume up key) and start over.

Note: This step is not to be confused with the section on Troubleshooting IP 

Phone Registration.

Note: All digits must be entered for the IP Address; example 192.168.001.011