4 zone inputs (8 zones with zone doubling) + 2 keypad zones2 partitions49 user codes256 events buffered1 PGM output
950mA switching power supply
Supervised bell output, auxiliary output and telephone line
Patented 2 opto coupler dialer circuit - the most reliable dialer in the industry
2-wire smoke detector input option (input 3)
Serial or parallel wiring for zone doubling connections
Master Code Lock: Cannot change or delete the Master Code or User Code 01
Supports pager reporting
Closing Delinquency Timer: Transmit a report when last arming exceeds timer
Auto-test report can now be set in hours or days

For more details, please:

Zone recognition
Device connected to which input?	728+	728+	738+	738+
	No ATZ	With ATZ	No ATZ	With ATZ
Control panel
Input 1=	Zone 1	Zone 1&2	Zone 1	Zone 1&9
Input 2=	Zone 2	Zone 3&4	Zone 2	Zone 2&10
Input 3=	Zone 3	Zone 5&6	Zone 3	Zone 3&11
Input 4=	Zone 4	Zone 7&8	Zone 4	Zone 4&12
Input 5=	N/A	N/A	Zone 5	Zone 5&13
Input 6=	N/A	N/A	Zone 6	Zone 6&14
Input 7=	N/A	N/A	Zone 7	Zone 7&15
Input 8=	N/A	N/A	Zone 8	Zone 8&16
Keypad
Zone 1=	Zone 5	Zone 9	Zone 9	Zone 17
Zone 2=	Zone 6	Zone 10	Zone 10	Zone 18