![]() If your computer has a serial port you only need one of these adapters. The key point is that the USB to Serial converter must be using a supported chipset such as the "PL2303" chipset. I've also found that the cables Cisco provides with laptops labeled CODi also work for this purpose. You need one that works with the phone such as IOGEAR USB-serial adapter (Model: GUC232A.). ![]() The Null Modem cable I found in my lab was originally an IDS Console Cable 72-1847-01.Ģx USBtoSerial adapter + driver. If you are doing SMDI you have one of these cables already) Wikipedia can show you how to make your own. But this phone doesn't have a console port? Right - but it does have USB ports.ġx RS232 Null Modem Cable (This has the blue 9 pin DB9 connectors on each end. If you're having a problem where the phone is rebooting or losing connectivity though, you may be better off by plugging a console cable straight into the phone. SSH debugging is great when network connectivity to the phone remains constant, and the phone doesn't reboot. ![]() Look at all of the cool show and debug commands in here. The debug shell gives you a huge number of debug commands. A VERY useful command would be "tail -f /var/log/messages" Option 2 - Debug Shell The default Linux shell lets you browse the phone's file system. At this point you have two options: Option 1 - Default Linux Shell You will then be greeted with ANOTHER username and password prompt. Login to the first username and password prompt with these admin defined credentials. Set these credentials in CCMAdmin and reset the phone. The first username/password pair can be set from the CCMAdmin Web Page under the SSH Username and password. There are two SSH logins needed to access the phone console. The new 89/99xx phones have different SSH AND Console debugging instructions from previous models of IP Phones.
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