仅当，等于，大于，小于

The SG 222 routes messages to the selected MC 224 ₁ – 224 _x only when the SMPP interface version of the selected MC 224 ₁ – 224 _x is equal to or greater than the SMPP interface version of the originating ESME 202 . The SG 222 rejects messages routed to the selected MC 224 ₁ – 224 _x when the SMPP interface version of the selected MC 224 ₁ – 224 _x is less than the SMPP interface version of the originating ESME 202 .

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