如何配置多个监听端口

listener.ora 文件内容如下:
# listener.ora Network Configuration File: D:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
LISTENER2 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = paultest)(PORT = 1523))
)
)
SID_LIST_LISTENER2 =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
(SID_NAME = ORCL)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = ORCL)
)
)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
(SID_NAME = ORCL)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = ORCL)

)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = paultest)(PORT = 1521))
)
)

tnsnames.ora 文件内容如下: 对应不同端口
# tnsnames.ora Network Configuration File: D:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORCL1521 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = paultest)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
ORCL1523 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = paultest)(PORT = 1523))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)