Dead connections with Implicit Connection

Hello,
With OracleConnectionCacheImpl I had a pool that worked fine except when the pooled connections lose their connection to the database (ie database goes down for weekly maintenance). However, when the db came back up the connections were still "INACTIVE" but dead meaning when you tried to access the pool you'll get "Cannot connect to Oracle" errors.
Can anybody tell me if this behaviour changes with the new Implicit Connection, and if it´s the case, provide references?
Thanks in advance,
Robert

Hello Tugdual,
thanks for your time, the versions are :
OC4J : not standalones but as a part of OAS 10g (9.0.4.1)
JDBC Driver : included in OAS currently classes12.zip , but I suppose I also can use ojdbc14.jar.
JDK : 1.4.2_02
With this versions does the Implicit Connection provide dead connection detection in case of database down ?
Regards,
Robert

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