• No se han encontrado resultados

4 ANALISIS FORENSE IM EN TELÉFONOS INTELIGENTES

4.4 Análisis de Telegram Messenger en Windows Phone

4.4.2 Estudio de artefactos

The call diversion menu allows you to be available even if you are not in the office.



Note

The call diversion is working according to the standard H.450. The gatekeeper must support this protocol.

Otherwise the option local call forward can be activated (see chapter 4.12.9

Protocol Option 'Local Call Forward on page 362).



The VoIP telephone supports three different kinds of call diversion:

• Unconditional: All calls are immediately diverted to another subscriber.



Note

This diversion state disables the other kinds of diversions.

With this setting calls are diverted immediately. The called party cannot answer the call.

• Busy: Calls are diverted when a call is already active.

• No reply: Calls are diverted if they are not answered within a certain time limit.



Note

In contrast to the unconditional call diversion you have the possibility to answer the call within a certain time, before the call is diverted.



Note

In the initial condition of the VoIP telephone, an active call diversion is indicated in the status bar by the symbol .

If the call diversion is permanent, the call diversion target is also indicated in the display.

Setup call diversion, switching on and off 1. In the initial condition press the key or .

2. Use the arrow keys to select the menu User Setup.

3. Press the key . The display appears in Figure 76.

4. Use the arrow keys to select the menu Call Diversion.

5. Press the key . The display appears in Figure 86.

Unconditional: Off

Busy: Off No reply: Off + Call Diversion

Figure 86: Menu Call Diversion

6. Use the arrow keys to select the desired kind of call diversion Unconditional, Busy respectively. No reply.

7. If you press the key at this point, you can switch between „on“ and „off“.

8. Press the cursor keys to go to the line below the desired type of call diversion.

9. Enter the telephone number of the desired call diversion target.

10. In order to store the selection, leave the menu by pressing the key three times.

The set call diversion is now active, and if the permanent call diversion is active, this is indicated in the display of the telephone.

3.8.2 Presence

The Presence menu allows you to be available to send a caller a message about the reason of not being reachable automatically.

Setup presence, switching on and off 1. In the initial condition press the key or .

2. Use the arrow keys to select the menu User Setup.

3. Press the key . The display appears in Figure 76.

4. Use the arrow keys to select the menu Presence.

5. Press the key . The display appears in Figure 87.

Activity:

Note

+ Presence

Figure 87: Menu Presence

6. Use the arrow keys or to select the desired kind of Activity: Away, Busy, Lunch, Meeting or Vacation. If you select at activity nothing, the feature will be deactivated.

7. Press the key , you will enter note input area. Now you will be able to enter a message with the key pad alphanumerical.

8. To store the inputs press the key two times. If no error will be detected, then for a short time the display ok appears in Figure 78.

3.8.3 Do not Disturb

The Do not disturb menu allows you not to be disturbed for a while.

The VoIP telephone supports different versions of Do Not Disturb:

• Do not disturb Off: All calls are switched through and acoustically and optically indicated.

• Do not disturb On:

o Action Ringing off: An inbound call is indicated in the display and entered in the Call List. The device does not ring. The caller hears a dial tone (free line signal). The display indicates that the Do not disturb feature is active.

o Action Ring once: An inbound call is indicated in the display and entered in the Call List. The device rings once. The caller hears a dial tone (free line signal). The display indicates that the Do not disturb feature is active.

o Action Silence: An inbound call is not indicated in the display, but merely entered in the Call List. The device does not ring. The caller hears a dial tone (free line signal). The display indicates that the Do not disturb feature is active.

o Action Busy: An inbound call is not indicated in the display, but merely entered in the Call List. The device does not ring. The caller hears a busy signal. The display indicates that the Do not disturb feature is active.

o Action Out of Office: An inbound call is not indicated in the display, but merely entered in the Call List. The out of office message is sent to the caller.

The Do not disturb feature can be activated for any call, for internal calls only, or for external calls only.

If action is set to out of office, then you can enter an out of office message even if the do not disturb function is set to off.

Setup do not disturb, switching on and off 1. In the initial condition press the key or .

2. Use the arrow keys to select the menu User Setup.

3. Press the key . The display appears in Figure 76.

4. Use the arrow keys to select the menu Do not disturb.

Do not disturb: Off Action: Silence For: Any Call

+ Do not disturb

Figure 88: Menu Do not Disturb Do not disturb: Off Action: Silence For: Any Call Out of Office Msg...

+ Do not disturb

Figure 89: Menu Do not Disturb (out of Office) 6. Use the cursor keys to select the line Do not disturb.

7. If you press the key at this point, you can switch between "On" and "Off".

8. Use the cursor keys to select the line Action.

9. If you press the key repeatedly at this point, you may switch between "Ringing off", "Ring once", "Silence", "Busy" and "Out of Office".

10. Use the cursor keys to select the line For.

11. If you press the key repeatedly at this point, you may switch between "Any Call", "External Calls" and "Internal Calls".

12. In order to store the selection, leave the menu by pressing the key three times.

The set call diversion is now active. If the permanent call diversion is active, this is indicated in the display of the telephone.