3Com 3102 Manual page 107

2 On the phone that will receive a bridged call (in this example, extension
1001):
a Log in to the VCX User Interface, select the My Extensions option,
then access the Bridge Mappings tabbed page.
b Map the bridged extension (in this example, extension 1000) to an
System Appearance (SA) button (either SA 4, SA 5, or both buttons)
and click Save.
You should not bridge an extension to a Basic phone (Models 2101 or
3101) because these phones have no programmable buttons. Therefore,
a Basic phone has no way of distinguishing a call to its extension and a
bridged call.
3 For the bridged line settings to take effect, the phone must retrieve the
new settings from the VCX server. By default, phones check the VCX
server for new information every 60 minutes (the phone registration
interval). To retrieve bridged line settings, you can use one of the
following options:
Wait for the phone registration interval to expire (60 minutes or
less, depending on when the last registration occurred).
Press Feature + 335 to force the phone registration to happen
immediately.
Log off and then log on to the phone.
In this example, an incoming call to extension 1000 will also ring on
extension 1001 on line 4 or on line 5 (or both lines) depending what you
selected in step 2b.
The primary phone user can make calls on a bridged line. The secondary
phone user can answer calls that are made to the primary phone's
extension but cannot make calls using the buttons that are associated
with the primary telephone. (In fact, the buttons on the secondary phone
associated with the primary phone function as speed dial buttons to the
primary phone.) Both users can use VCX features to manage bridged
calls. For example, bridged calls can be transferred, put on hold, or
forwarded to voice mail. However, because multiple phones are involved,
you should note the considerations discussed in
with Other Features.
When an extension is bridged, SA buttons (4 or 5) and status lights on
the secondary phone are associated with Bridged System Appearance
Enabling Bridged Extensions
Bridged Line Interaction
107