我首先尝试了一个非HP光模块，收到错误：

Not an HP Networking transceiver

打电话给惠普，他们说我需要订购惠普品牌的光收发器部件号 468508-002，所以我做了。200 美元之后。

我插入开关并得到同样的错误，甚至尝试电源循环。谢谢你 。

运行最新固件。

也尝试了以下命令：

HP-2520G-8-PoE> allow-unsupported-transceiver
Invalid input: allow-unsupported-transceiver
HP-2520G-8-PoE> config
Invalid input: config
HP-2520G-8-PoE> enable
Username: manager
Password:
HP-2520G-8-PoE# allow-unsupported-transceiver
Invalid input: allow-unsupported-transceiver
HP-2520G-8-PoE# config
HP-2520G-8-PoE(config)# allow-unsupported-transceiver
Invalid input: allow-unsupported-transceiver
HP-2520G-8-PoE(config)# enable
Invalid input: enable
HP-2520G-8-PoE(config)# exit
HP-2520G-8-PoE# allow-unsupported-transceiver
Invalid input: allow-unsupported-transceiver
HP-2520G-8-PoE# enable
Invalid input: enable
HP-2520G-8-PoE# config
HP-2520G-8-PoE(config)# allow-unsupported-transceiver
Invalid input: allow-unsupported-transceiver
HP-2520G-8-PoE(config)#
ROM information:
   Build directory: /sw/rom/build/wallerom(t4b)
   Build date:      Oct 26 2009
   Build time:      14:31:18
   Build version:   J.14.05
   Build number:    28079