DBL Technology RoIP-302 Series User Manual page 7

得伯乐科技有限公司
DBL Technology Limited
The diagram below demonstrates each RoIP302 are connected to 3 Radio Terminals. Each
terminal is assigned to a different group. The two RoIP are connected via a IP connection as shown
by the blue line. The PTT control signal is represented by the single purple lines and the voice
signals are represented by the double purple lines. When a voice transmission is initiated from a
channel, the RoIP302 will connect to the other RoIP302 in order to establish a link with the
corresponding channel automatically.
b. Group Transmit Mode
At least one RoIP302M is required to support the Group Transmit mode. This RoIP302M is the
master with its own unique Group SIP Number and offers its built-in SIP server for up to 12
RoIP302s (RoIP302M can also register as well for expansion) to register. The diagram below shows
only RoIP302s are used to register to the RoIP302M. Each RoIP302s must have its unique Group
SIP Number. A maximum of 12 RoIP302s can be deployed in this example. Please note that only
one one-way voice transmission is allowed at all time.
When a voice signal is transmitted from a RoIP302, RoIP302M will re-transmit the signal to all
other clients in the same group. If the voice signal is coming from a PTT port (radio terminal) of the
RoIP302M, the RoIP302M will re-transmit the voice signal to all other PTT ports and SIP clients
that are in the same group. For example, if Channel 802 talks, Channel 701, 803 and 804 can hear.
If Channel 701 talks, Channel 802, 803, and 804 can hear.
Please note that when more channels are used, the higher bandwidth is required and the poor
RoIP-302 User Manual
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