SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:oracleproduct10.2.0db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = tell)
      (ORACLE_HOME = D:oracleproduct10.2.0db_1)
      (SID_NAME = tell)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = telldg)
      (ORACLE_HOME = D:oracleproduct10.2.0db_1)
      (SID_NAME = telldg)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.11.34)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )
 
 
 
========================================================
listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = demo)
      (ORACLE_HOME = D:oracleproduct10.2.0db_1)
      (SID_NAME = demo)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ORCL)
      (ORACLE_HOME = D:oracleproduct10.2.0db_1)
      (SID_NAME = ORCL)
    )
  )

LISTENER =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = Colin)(PORT = 1521))
  )