CAPÍTULO II REALIDAD PROBLEMÁTICA
2.3. Objetivo del proyecto
2.3.4. Viabilidad
Along with spontaneous call transfers as controlled by a subscriber during a call, it is often useful to set up a permanent call forwarding ("redirect calls"). For example, a call should be forwarded when a line is busy, if there is no answer within a certain period, or in case of absence (e.g. vacation).
There are two possibilities for configuring permanent call forwarding.
쮿 Via the telephone or terminal device itself with the aid of control characters
쮿 In the configuration of the LANCOM VoIP Router by means of the management tools (LANconfig, WEBconfig or telnet)
If permanent call forwarding is activated by both methods, then the behavior of the call forwarding follows the last respective action.Triggering call forwarding
The following events can be used as a trigger or condition of the permanently configured call forwardings:
Call transfer, consult SIP ISDN Analog
To open a second line during a call, first press the Flash/Call hold key (or 'F' on analog phones).
The other caller can no longer hear you.
HOLD HOLD or F F
Dial the number for the second caller while the first call is on hold.
If you cannot reach the second caller, you can return to the call which is on hold by pressing the hold key.
123456789 123456789 123456789
As soon as you have established two simultaneous connections you can connect the two callers with the connect key (or 'F' and '4' on analog phones) or by hanging up the handset.*
Optionally you can switch between the two lines as often as you like before transferring. Call transfer always connects the active call and the call on hold.
CONNECT or
You have no more active calls. You can either hang up or make a new call. HANG UP 123456789
HANG UP 123456789
HANG UP 123456789
Call transfer, blind SIP ISDN Analog
To open a second line during a call, first press the Flash/Call hold key.
The other caller can no longer hear you.
HOLD HOLD HOLD
Dial the number for the second caller while the first call is on hold. 123456789 123456789 123456789 Press the connect key (or 'F' and '4' on analog phones) or hang-up the handset before the
second connection has been established.*
The two callers will now be connected "in the background".
CONNECT or
You have no more active calls. You can either hang up or make a new call. HANG UP 123456789
HANG UP 123456789
HANG UP 123456789
왏 PBX functions for LANCOM VoIP Router
Addendum to L C OS- V ersion 7.20
쮿 CFU, call-forwarding unconditional 쮿 CFB, call forwarding on busy
쮿 Delayed call forwarding, CFNR (call forwarding no reply); CFNA (call forwarding no answer) 쮿 No call forwarding
All types of call forwarding can be used in parallel with your own target telephone numbers. If multiple call forwarding conditions are active, the following priority applies:
쐃 CFU 쐇 CFB 쐋 CFNR
If, for example, call forwarding on busy is activated and a corresponding target number has been defined, then the call will be forwarded to this target before referring to a target as defined for forwarding on busy.
If the incoming call has already been forwarded from another telephone number, then forwarding will not take place again, so as to avoid endless call-forwarding queues.왏 PBX functions for LANCOM VoIP Router
Addendum to L C OS- V ersion 7.20
Configuring user settings in the LANCOM VoIP Router
The following parameters are available for configuring user settings in the LANCOM:
쮿 Entry active
Activates or deactivates the entry.
왏 Default: Active
쮿 Internal telephone number
The call settings apply to this telephone number or SIP-ID.
왏 Values: Maximum 64 alphanumerical characters.
Call forwarding can be set up for all local users (SIP, ISDN or analog).쮿 Enabling user control via keypad or DTMF
This activates or deactivates the option for users to configure their settings via the telephone.
왏 Default: Yes Configuration tool Call
LANconfig VoIP Call Manager 왘 Call router 왘 Users 왘 User extensions
WEBconfig, Telnet Expert Configuration > Setup > Voice Call Manager > Users > Extensions
왏 PBX functions for LANCOM VoIP Router
Addendum to L C OS- V ersion 7.20
쮿 Busy on busy
Prevents a second call from being connected to a terminal device, irrespective of whether CW (call-waiting indication) is active on the device or not; i.e. there is no "call waiting" signal. The second caller hears an engaged tone. This also applies where an internal telephone number supports multiple logins and just one of the possible terminal devices is already in use.
왏 Default: Yes
쮿 Call-forwarding unconditional
Activates or deactivates the immediate forwarding of calls (CFU).
왏 Default: No 쮿 to number
Target for immediate unconditional call forwarding
왏 Possible targets: Local users, hunting groups, external telephone numbers 왏 Values: Maximum 64 alphanumerical characters.
쮿 Call-forwarding on busy
Activates or deactivates call forwarding on busy.
왏 Default: No 쮿 to number
Target for call forwarding on busy.
왏 Possible targets: Local users, hunting groups, external telephone numbers 왏 Values: Maximum 64 alphanumerical characters.
쮿 Call forwarding, no reply
Activates or deactivates the delayed forwarding of call (after waiting for no reply).
왏 Default: No 쮿 to number
Target for call forwarding no reply.
왏 Possible targets: Local users, hunting groups, external telephone numbers 왏 Values: Maximum 64 alphanumerical characters.
쮿 Delay
Wait time for call forwarding on no reply. After this time period the call is forwarded to the target number if the subscriber does not pick up the phone.
왏 Values: Max. 255 seconds.
왏 Default: 15 seconds
왏 PBX functions for LANCOM VoIP Router
Addendum to L C OS- V ersion 7.20
Configuring user settings with the telephone with character strings
For the configuration of user settings with the telephone, the various technologies (SIP, ISDN, analog) each offer specific possibilities. With ISDN telephones, call forwarding can be controlled by the functional protocol in the ISDN signaling or via so-called keypads (character stings). For analog telephones the same character strings are transferred by DTMF. The SIP protocol provides another option with its REFER method that is supported by most SIP phones and SIP softphones. However, call forwarding can only be controlled by the terminal device. To enable a uniform behavior for users in mixed infrastructures, the LANCOM VoIP Router offers an additional variant of call forwarding for SIP phones, as is presented here in comparison with ISDN and analog telephones.
Please note the following when using character stings to configure call forwarding: