ALEX里面查詢HBSPD功能塊，對于SAE 601-605都提到subaddress，不知道是個(gè)什么意思。
哪位大俠幫我解釋一下？

SAE 601 is subscriber-related.

Block HBSPD stores in SAE 601 the subaddress registered for the CFU SS.

One individual is seized when the CFU SS, with subaddress, is registered for a subscriber. The individual is released when the subaddress is erased.

When the SAE becomes congested, any request to register the CFU SS with subaddress for a subscriber, will be denied unless the subscriber already had the service registered with a subaddress.

The Software File Congestion Supervision function supervises this SAE.