Tyco Electronics M7200 6.28 TELEPHONE INTERCONNECT CALLS (SYSTEM MODEL CONTROL HEAD) , 6.29 EMERGENCY COMMUNICATIONS

the radio user. The entire selective alert message, including the abbreviation, can include up to two

hundred (200) text characters.

6.28 TELEPHONE INTERCONNECT CALLS (SYSTEM MODEL CONTROL

If the radio system is equipped with Public Switched Telephone Network (PSTN) interconnect

equipment, telephone calls can be made from the M7200 using this procedure:

1. Press the *9 keys.

2. Enter the telephone number. (Ignore dashes/spaces, and precede the number with any required access

digits such as a 1 for long distance.)

3. Press the # key.

4. Wait a few seconds and then press and release the mic’s PTT button to initiate the call. An initial ring

tone plays indicating call initiation. Once the gateway picks up the call, the ring tone changes.

5. When the caller answers, depress the PTT button when speaking and release it to listen to the caller.

6. To hang-up, press the MENU button on the front panel.

The M7200 mobile radio can transmit both emergency voice calls and emergency alerts over the entire

network. OpenSky handles emergency calls and alerts with the highest priority.

For critical voice communications, an emergency call can be raised on the default talk group or the

currently selected talk group by “declaring” an emergency on the talk group. The exact talk group is

determined by the currently active profile. After successfully declaring an emergency on a talk group, the

declaring radio’s microphone remains “hot” for a predetermined amount of time. In other words, the radio

transmits audio for a period of time even when the microphone’s PTT button is not depressed. An

emergency talk group is provided greater priority and infinite hang-time by the radio system’s

infrastructure. Hang-time is the maximum duration of quiet time between transmissions on the talk group

before the infrastructure assets are automatically taken away. Because an emergency call is handled on a

talk group, it is received by all radios and consoles monitoring the talk group.

An emergency alert is a data message sent by the radio to the MIS console (or any console capable of

receiving it). It identifies the radio declaring the emergency, and the radio’s location (if the radio is

equipped with a GPS receiver). Voice audio is not automatically transmitted during the emergency if the

administrator configures the radio for alert notification only.

To declare an emergency call or emergency alert, press and release the orange Emergency button. This

button is located just to the right of the 5-button Menu and Select keypad; see Figure 6-1 on page 14.

Note the following:

• The OpenSky network administrator determines if the Emergency button is used to declare an

emergency call or if it is used to declare an emergency alert. This is based upon the radio’s currently

active profile.