Chapter 3: Operate the system
SB-Safety Voice 63
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Placing a call, default priority
All calls are per default defined as priority level 2 calls. The phone numbers
must start with the international call prefix "00" followed by the country
code e.g. "870" for Inmarsat satellite phones. The priority level is shown on
the annunciator panel.
Placing a call with selected priority
If you want to make a call with a selected priority level, you must change
the international call prefix to the phone number.
When dialing numbers the international call prefix can be changed to select
the priority level: "01" for level 1, "02" for level 2 and "03 for level 3. The
phone numbers will look like this:
• Priority level 1: 01 45 XX XX XX XX
• Priority level 2: 02 45 XX XX XX XX (or 00 45 XX XX XX XX)
• Priority level 3: 03 45 XX XX XX XX
(45 is an example of a country code, Denmark in this example)
No matter which priority level the outgoing call has, the phone number
transferred to the built-in telephone exchange is converted to the standard
phone number using 00 as international call prefix. You can see the priority
level of the call in the annunciator panel.
Placing a call, dial timeout
When you place a call, the SBU needs a timeout after the last digit dialed
before the SBU can make the call. The timeout is approximately 5 seconds.
You can bypass this timeout by using the "#" key.
Preemption
If an incoming call of a higher priority than the ongoing call, for example
ongoing call priority 2 and incoming call priority 1, occurs, the active call is
terminated immediately. If the active call is terminated, a preemption tone
for 3 seconds announces the incoming call in the headset or handset. At the
same time the priority level of the new call flashes on the annunciator panel
and then goes solid when the new call is established. The new incoming call
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