You cannot initiate a camp on call to, An acd extension, A hunt group extension – 3Com NBX 3101SP User Manual
Page 65: A tapi routepoint extension, A call park extension, A phantom extension

Using Camp On
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You cannot initiate a Camp On call to:
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An ACD extension
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A Hunt Group extension
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A TAPI RoutePoint extension
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A Call Park extension
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A Phantom extension
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You cannot initiate a Camp On call to a device connected to an Auto 
Attendant or Voicemail.
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You can use either System-wide Speed dials (SSDs) or Personal Speed 
Dials (PSDs) that are mapped to a valid extension as an alternative to 
manually dialing the Camp On destination extension.
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If Call Forward All or Do Not Disturb is enabled on the Camp On 
destination extension, the message “Not Allowed” is displayed at the 
telephone attempting to initiate the Camp On.
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The condition of the destination extension at the time you initiate 
Camp On determines the following:
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If the Destination Extension is In Use — One or more (but not 
all) of its system appearance lines are presently being used. In this 
condition, you can use either Camp On with Call Transfer or Direct 
Camp On to queue a call on to the destination extension.
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If the Destination Extension is Busy — All of its system 
appearance lines are presently being used. In this condition, you 
can use only Direct Camp On to queue a call on to the destination 
extension.
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If the Destination Extension is Available — Instead of queuing 
the call, both Camp On with Call Transfer and Direct Camp On act 
as a blind transfer (See 
earlier in this chapter.)
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If you have an NBX Entry telephone or an analog telephone you can 
use only Direct Camp On to queue a call on to the destination 
extension.
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If you are using Camp On with Call Transfer and the destination 
extension has its Call Coverage set to Disconnect, after the transfer 
times out, you receive a busy tone. You can now initiate Camp On to 
the destination extension.
For additional tips and considerations on using Camp On, see your NBX 
system administrator.
