General Use
TANDBERG Director Videoconferencing System
39
MultiSite
TF
(MCU)
The system has a built-in multipoint conference unit (MCU), MultiSite
TF
, which has the capability to
establish meetings with up to 4 video sites (5 if at least one site is a telephone call, ISDN/analogue/
mobile).
All video calls in a conference must be connected using the same bandwidth.
A conference can consist of any combination of ISDN/IP sites.
It is possible to have telephone meetings with up to 5 participants.
The MultiSite
TF
supports both Voice Switched and Continuous Presence mode (see ‘MCU Services’
in ‘Advanced Use’ for description of these modes).
Establishing a conference is done by first
making a call to one site. When a call is
established with the first site, the other
sites are connected one by one.
It is possible to either dial out to the sites
or the sites can dial in to the MultiSite
TF
.
Both ISDN, IP and mixed ISDN/IP
conferences can be encrypted if all
systems supports encryption.
For encrypted calls, there is a maximum
bandwidth of 768 Kbps for the whole
conference. This means that a 3-site
conference will have a maximum
bandwidth of 384Kbps per connection,
while a 4-site conference will have a
maximum bandwidth of 256 Kbps per
connection.
M
ULTI
S
ITE
- W
HICH
QUALITY
CAN
BE
USED
ON
EACH
SITE
?
4
SITES
4
SITES
3
SITES
3
SITES
+
P
-
TO
-
P
+
(2M
BPS
VERSION
)
+1
PHONE
1-2
PHONES
1-3
PHONES
BRI (768
KBPS
)
256
KBPS
192
384
320
512
PRI-E1(1920
K
)
512
512
768
768
1472
PRI-T1(1472
K
)
384
384
512
512
1152
LAN (3M
B
)
768
768 *
1152
1152 *
1920 *
M
IX
ISDN/LAN
EXAMPLE
:
IF
4
SITES
ARE
CONNECTED
,
TWO
LAN
SITES
AND
ONE
ISDN
SITE
CAN
BE
CONNECTED
ON
512
KBPS
(2M
BPS
VERSION
)
OR
256
KBPS
(768
KBPS
VERSION
).
NOTE
- 4
SITES
INDICATES
YOURSELF
+
THREE
OTHER
SITES
.
* - R
EQUIRES
1-3 ISDN
CHANNELS
AVAILABLE
.
N O T E
W
HEN
MIXING
ISDN
AND
LAN
SITES
,
THE
TOTAL
BANDWIDTH
LIMITATION
IS
THE
SAME
AS
FOR
THE
ISDN
BANDWIDTH
.
T I P
S
EE
‘U
TILITIES
’, ‘C
ONTINUOUS
P
RESENCE
’
TO
CHANGE
MODE
.
TF
- TANDBERG F
IRST
