
Chapter Seven: Setting up the Phone Ports Supplementary services
89
Notes on Call Waiting behavior
The following situations apply if you are on the phone and a second call comes in:
Notes on call bumping
If ISDN Call Waiting is disabled, call bumping will not occur, as MultiLink PPP uses the Call Waiting
signalling information from your service provider to determine if it should release a B-channel to
accommodate an incoming voice call.
Calling Line Identity on Call Waiting
Calling Line Identity on Call Waiting works with telephones equipped with a call display indicator. With this
feature, if you are on the phone and another call comes in, the number of the second incoming call is displayed.
In Denmark, this feature is known as CallerID Plus. CallerID Plus does not display the identity of the second
call automatically; when you receive a call waiting signal, you must press R, then 9.
Calling Line Identity Presentation
Calling Line Identity Presentation works with telephones equipped with a call display indicator. When you
receive an incoming call, the number of the call is displayed.
Calling Line Identity Restriction (CLIR)
This feature permits you to restrict calling line identity on outgoing calls on a per-call basis. Currently this
feature is supported on the phone ports only.
To restrict identification on a per-call basis, you must enter a code before dialing the number. This code
depends on your region.
Denmark
1.
Lift the receiver.
2.
Dial *31# followed by the number you wish to call.
If you have CLIR permanently enabled on your line, you can temporarily disable it using the prefix #31#.
United Kingdom and Ireland
In these regions, you must dial 141 before dialing the destination number. For example, if you were calling
5551234, you would dial 1415551234.
If ... Then ...
• ISDN Call Waiting is enabled. • You will hear a Call Waiting alert.
• Call switching is handled by your ISDN service
provider.
• ISDN Call Waiting is not enabled.
• DIVA LAN ISDN Modem Call Waiting
is not enabled.
• You do not receive a Call Waiting alert.
• The second call receives a busy signal.
• ISDN Call Waiting is not enabled.
• DIVA LAN ISDN Modem Call Waiting
is enabled.
• Both B-channels are in use.
• The second call receives a busy signal., as the
DIVA LAN ISDN Modem Call Waiting requires
a free B-channel to hold the call.
• ISDN Call Waiting is not enabled.
• DIVA LAN ISDN Modem Call Waiting
is enabled.
• One B-channel is free.
• You hear a Call Waiting alert.
• The second call is received using the available
B-channel.
• Call switching is handled by the DIVA LAN
ISDN Modem.
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