THE PHILIPPINE ELECTRONICS CODE BOOK 1 (VOLUME 2: BUILDING TELEPHONE FACILITIES) and PHILIPPINES ELECTRONIC CODE BOOK 2 (FIRE DETECTION ALARM SYSTEM)THE PHILIPPINE ELECTRONICS CODE BOOK 1 (VOLUME 2: BUILDING TELEPHONE FACILITIES) and PHILIPPINES ELECTRONIC CODE BOOK 2 (FIRE DETECTION ALARM SYSTEM)WWTHE PHILIPPINE ELECTRONICS CODE BOOK 1 (VOLUME 2: BUILDING TELEPHONE FACILITIES) and PHILIPPINES ELECTRONIC CODE BOOK 2 (FIRE DETECTION ALARM SYSTEM)