33522A局域网问题和单位锁定

在我们的开发区域，我们有大约20个33522A单元，其中一半正在经历随机锁定，只有一个电源循环可能会中断。
当使用静态IP进行设置时，这些相同的单元不响应ping请求，并且当LAN配置为DHCP时，它们要么没有提供IP地址信息，要么提供169.XXX地址（不在任何
我们的子网）。正在经历LAN配置的那些设备也遇到了锁定，从未连接到网络的设备似乎没有任何问题。由于LAN连接中断，这使得升级（或者就此而言，
只是重新加载）固件不可能，因为我们知道的唯一固件升级是通过网络完成的。
是否可以在没有LAN连接的情况下执行任何诊断或固件升级？



     以下为原文

  We have about twenty 33522A units in our development area and half of them are experiencing random lock-ups that only a power-cycle can break. These same units do not respond to ping requests when setup with static IPs, and when the LAN is configured for DHCP they either don't come up with and IP address information or come up with 169.X.X.X addresses (which is not in any of our subnets).

Those units that are experiencing the LAN configurations are also experiencing the lockups, a device that has never been connected to the network appears to have no issues whatsoever.


Since LAN connectivity is down, this makes upgrading (or for that matter, just reloading) the firmware impossible since the only firmware upgrade we know about is done over the network. Is it possible to perform any diagnostics or firmware upgrades without LAN connectivity?