PA-POS-OC3板卡几个相近的型号之间的差别

End-of-Sale Product Part Number	Product Description	Replacement Product Part Number	Replacement Product Description
PA-POS-OC3MM	Packet over SONET 1-port OC3 Multimode port adapter	PA-POS-1OC3 + SFP-OC3-MM	PA-POS-1OC3 base card plus separately ordered multimode pluggable optic
PA-POS-OC3SML	Packet over SONET 1-port OC3 Single-Mode Long Reach port adapter	PA-POS-1OC3 + SFP-OC3-LR1	PA-POS-1OC3 base card plus separately ordered long range pluggable optic
PA-POS-OC3SMI	Packet over SONET 1-port OC3 Single-Mode Intermediate Reach port adapter	PA-POS-1OC3 + SFP-OC3-IR1	PA-POS-1OC3 base card plus separately ordered intermediate range pluggable optic

       最近用户通知一块插在WS-X6582-2PA上的PA板卡有问题，不能马上方便到现场，只能从配置里边找板卡型号，在show module里只能看到主板卡型号，无法列出子板卡型号。show inventory 可以找到子板卡PA-POS-OC3-SM，给配件中心报过去后，发现这种板卡有两种小型号，PA-POS-OC3SMI 与PA-POS-OC3SML 当时就纳闷了，研究后发现原来一个中距离的 一个长距离的。在PA-POS-OCSMI子板卡上会有155-IR ->字样出现,估计PA-POS-OC3SML应该有155-LR->(只是猜测)。PA-POS-OC3MM子板卡上标有155- MM->的标示。