Nortel Meridian Companion Installation And Maintenance Manual page 167

MADN MCA
Bridge-tap
P0725810 Issue 3.0
Multiple Call Arrangement of Multiple Appearance Directory
Number (MADN MCA) is similarly to MADN SCA, but allows two
active calls on that host switch directory number. For example, when
a call is active on a portable, a second call can be made or received
from the twinned desk telephone. Your host switch may use another
name for this feature.
Bridge-tapping is another method of twinning a portable and a desk
telephone. The desk telephone and the portable are assigned the
same host switch directory number when bridge-tapping is used. An
incoming call rings on both telephones and can be answered on
either. Only one call can be active on the line assigned to the host
switch directory number. For example, when a call is active on the
portable, a second call cannot be made on the twinned desk
telephone.
Telephones that are twinned by bridge-tapping on the
COMPANION 200 system are supported by a single access line that
connects the Controller to the host switch. The access line is
programmed at the host switch as though it supports a standard
analog telephone. The desk telephone is wired directly into this
access line. Therefore, the host switch directory number assigned to
the shared access line terminates at two destinations: the portable
and the desk telephone.
• Bridge-tapping can be used with any host switch.
• The desk telephone must be a standard analog telephone.
• The portable and the desk telephone are provided with the same
set of host switch features. Both telephones are limited to
accessing the host switch features available to a standard analog
telephone. Changing the feature settings of the external line will
impact both the portable and the desk telephone.
• A call in progress on a portable can be easily continued without
interruption on the desk telephone to which it is twinned simply
by lifting the receiver. The call on the portable can then be
terminated.
• A call in progress on the desk telephone can be continued without
interruption on the portable to which it is twinned simply by
establishing a connection. The call on the desk telephone can then
be terminated by placing the receiver in its cradle.
• Privacy of telephone conversations is not ensured when bridge-
tapping is used. Since the physical line is shared, direct access to
COMPANION 200 Installation and Maintenance Guide
Appendix D: Programming the host switch 168