User's Manual

18
Unblocking a Blocked SIM Card
If a wrong PIN code has been entered 3 times in a row, the RTU
blocks the SIM card. If a blocked SIM card is inserted into the SIM
card holder or if a SIM card already in the SIM card holder is
blocked, the display will show “SIM Card blocked” when the CU is in
idle state. In order to unblock a blocked SIM card:
Follow step 1 – 3 above.
4. Find the “PUK Code” item and press:
5. Enter the correct PUK code and press:
6. Enter a new 4-8 digit PIN code and press:
7. Re-enter the new PIN code and press:
Ringing Tone
When configuring each handset, the user can choose among a
number of different ringing tones.
The procedure is to choose one of the following 4 ringing tones:
• Deep
• High
• Alternating slowly
• Alternating fast
The ringing tone for internal incoming calls as well as the ringing
tone for external incoming calls are both affected by this single
choice. Therefore they cannot be set independently.
For external incoming calls, resulting tones are respectively:
• Deep
• High
• Alternating slowly
• Alternating fast
For internal incoming calls (local calls), the resulting tones are
respectively:
• Deep dual
• High dual
• Deep dual
• High dual
As mentioned above, choosing a ringing tone affects both the
external incoming ringing tone and the internal incoming (local call)
ringing tone according to the following table:
Choice of ringing tone External incoming calls Internal incoming calls
Deep Deep Deep dual
High High High dual
Alternating slowly Alternating slowly Deep dual
Alternating fast Alternating fast High dual
An internal incoming call (local call) can always be recognized by
two equal consecutive tones (hence the term “dual” in the table)
followed by a pause. The tones may be deep or high.
An external incoming call can always be recognized by a single
continuous sound sequence (deep, high, alternating slowly or
alternating fast), followed by a pause.
An example: To set the external incoming ringing tone to alternating
slowly, and the internal incoming ringing tone to deep dual (remem-
ber that they cannot be set independently as described above):
1. To enter the function menu, press:
2. To select the “Setup” item, press:
3. Find the “Ring tone” item using and press:
4. Find the “Slow alt.” item using and press:
Extension
At any time, each handset is uniquely characterised by an extension
number. That is, only one handset at a time may have a given
extension number. The extension numbers may be changed, but no
two handsets can have the same extension number simultaneously.
To change the extension number of a handset do the following:
0125