Troubleshooting guide

Table Of Contents
113
Software Installation
4. Check LED on the IP telephone for network activity.
5. A green LED on the bottom of the phone indicates a proper
connection.
6. A flashing red LED indicates activity (data flow) on the network.
7. Use the PING (Packet Internet Groper) on the IP telephone to
determine whether the server's (3300 ICP, DHCP, and/or TFTP) IP
address is accessible.
8. Ensure that the DHCP server has been programmed with the correct
information. Refer to the System Administration Tool online help for
details.
9. If the IP telephone displays "TFTP LOAD FAILURE" verify that the
TFTP Firmware, DSP and Main. software loads are available and not
corrupted.
10. Ensure that the phone is registered with the system.
Downgrading to a Previous Software Release
If it becomes necessary to downgrade the system software, ensure that
you have an off-board database backup that was created in the software
version that you are going back to.
Table 12: 3300 ICP Downgrade Restrictions
Controller Lowest software release supported
MXe III MCD Release 4.2
MXe Server
MXe II with 21363 DSP
Release 8.0
AX controller Release 7.1
MXe II controller Release 7.0
CX/CXi controller Release 6.0
CX II/CXi II controller MCD Release 4.0
LX controller Release 5.0
Note: Some modules that are installed in the controller may not be
supported by the lower software release. For example, the DSP II card is
not supported below Release 9.0.