3Com NBX 100 Administrator's Manual page 291

Using Supervisor Passwords
This section documents some issues to be aware of when using
supervisor passwords.
The call supervisor can be anyone who knows the supervisor
password; there is no other restriction.
When an ACD is modified, the supervisor password may be changed
for that ACD.
When an ACD is created or modified, announcement tones may be
turned on or off.
Key Mapping
Be aware of the following key mapping issues:
The system administrator may map the Feature Code for
Silent-Monitor mode to a phone key for individuals or for groups.
Users may change the key mapping for their own extensions only.
Using Supervisory Monitoring
For a call to be monitored, the call must have traversed a hunt group, an
ACD group, or a route point. Also, the last hunt group, ACD, or route
point that the call traverses retains ownership of the call in terms of
Supervisory Monitoring. In other words, the extension and password of
the last hunt group, ACD, or route point that the call traverses must be
entered by the supervisor in order for the call to be monitored.
When the supervisor invokes Barge-in and either the caller or the
agent subsequently puts the call on hold, the supervisor is still able to
talk to the remaining party.
The person who is being supervised need not be an agent, neither
should this user have to be logged in.
An agent in a monitored call can transfer a call to another party.
A call being monitored can be answered by someone using Call
Pickup.
The primary could be receiving a call and the secondary who is not a
part of a hunt group, ACD, or route point could answer the call.
Supervisory Monitoring Usage Notes 291