MERLIN LEGEND Communications System Release 5.0
Feature Reference
555-650-110
Issue 1
June 1997
Features
Page 187
Digital Data Calls
Callback
Videoconferencing systems that can dial feature codes using # can use
Selective Callback. When a pooled line becomes available or the busy
video system is idle, the queued call is made, one B-channel at a time.
When the second B-channel becomes available, it can be used for the
connection as well, providing the video system supports this capability.
Although video systems can use either off-hook or on-hook Callback, you
should only use off-hook Callback for 2B data connections. If you use
on-hook Callback, the returning callback call is connected using only one
B-channel.
Automatic Callback should be disabled for digital data and
videoconferencing extensions. It can be used at MLX passive-bus
extensions at desktop video workstations.
Camp-On
You cannot camp onto data or video calls.
Conference
Conference does not function with data calls.
2B data video calls require both B-channels at a video workstation. For
this reason, if a call is on hold for conferencing at a passive-bus MLX
telephone when a 2B call comes in, the passive-bus MLX telephone
cannot retrieve the held call until the 2B video call is over.
Coverage
Individual Coverage is not recommended for 2B data calls. Because a
coverage receiver can have only one Cover button for each coverage
sender, only a 1B data call arrives at the receiver. The second call of a 2B
call continues to ring at the coverage sender.
Coverage delays do not apply to data calls. Calls ring immediately.
Coverage is not recommended for video extensions. However, an MLX
passive-bus telephone can be covered during 2B video calls (when both
B-channels are busy), but it must have a programmed Do Not Disturb
button. The user at the telephone activates Do Not Disturb during 2B
calls.
A passive-bus MLX telephone can be a coverage receiver, but this gives
the user little control when B-channels must be available for 2B data.
CTI Link
If you program a CTI link for an extension that is already programmed for
2B data, the 2B data programming is no longer functional. The 2B data
programming should be removed from the extension.
Directories
Digital communications devices and videoconferencing systems cannot
make use of Extension, Personal, or System Directories.
Do Not Disturb
Digital communications devices can activate Do Not Disturb by dialing the
virtual button number (for example
#01
) of the Do Not Disturb button. Do
Not Disturb can be activated by video systems that have the ability to dial
strings and feature codes beginning with #.
