User manual

APPLICATIONS

Section 5

5-6

5.8 Low Power/Standby Mode

The DPX-213 has a low power feature that allows the unit to be placed in a state where it

will draw no current.

There are 2 methods of entering this state, namely:

•

Using the ATZ1 command, or,

•

Placing a value other than 0 in the inactivity timer registers S36/37, and allowing the

unit to sit in offline Idle Mode until the inactivity timeout is reached.

To enter standby mode in both instances, the DTR must be disabled or held inactive. The

modem will wake up on rise of DTR (if DTR is enabled), ring detection, activity on the

DTE TxD input, or power cycle.

5.9 Alarm Mode

Alternate number dialling. In alarm mode, when an alarm call is made, the unit will dial

the number in location 0. If the call is unsuccessful the unit will attempt to dial the number

contained in location 1. If this does not exist, the modem will revert to location 0. For

every attempt (or pair of attempts if location 1 contains a number) the modem checks if the

redial count (S50) has been reached and gives up if this occurs.

Alarm detection while on line. If the DTR is raised while on line or during disconnection

the modem will detect the raised DTR and generate another alarm.

5.10 Password Mode

On answering a call the unit will respond with a password prompt (location 9 string) or

PASSWORD ? if location 9 is not programmed. The modem will then wait for 20 seconds

and allow 3 attempts to enter a correct password. Is a correct password is seen the unit

will connect (AT*P1) or disconnect and attempt to dial-back the user. If the unit is in dial

back mode and a correct password is entered which does not have a dial back number, the

caller will not gain access even though the modem indicates a correct password entry.

Storage locations 5-8 may be used for password storage.

Passwords are stored in the following format. For example:

\password,password\number

\fred\t2225555\jim\\sid\t5554444

\ian,sigmund,kylie\t4365879\terry\