Using the VC120 Video Conferencing System
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2. On system A, select Auto from the pull-down list of Call Type before calling.
3. On system A, dial the account numbers of system B.
Result：
If account polling is disabled, system A can only use its Cloud account (highest priority) to
call system B.
If account polling is enabled, system A will use its Cloud account (highest priority) to call
system B first. If this call fails, system A continues to use its SIP account (next priority) to
call system B.
8-way MCU
To initiate a multipoint conference, you must use an MCU.
Without 8-way MCU, the VC120 video conferencing system supports one video calls and an
additional voice call (an original caller and two other sites). You can import an 8-way MCU to
extend the VC120 to support 8-way video calls and an additional voice call (an original caller
and eight other sites). 8-way MCU is configurable via web user interface only.
VC120 video conferencing system supports a permanent version of the 8-way MCU and a trial
version of the 8-way MCU. They have the same feature.
Permanent version of the 8-way MCU: each VC120 has a unique MCU license. The MCU
license cannot be used for other systems. You need to contact Yealink resellers to purchase
it, please provide the MAC address of your VC120 when purchasing.
Trial version of the 8-way MCU: VC120 models can share this MCU license. You can
download a 30-day trial from Yealink website.
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