Version 7.2 469 Mediant 1000B Gateway & E-SBC
User's Manual 22. Trunk Groups
Parameter Description
Channel Select Mode
channel-select-mode
[TrunkGroupSettings_ChannelS
electMode]
Defines the method by which IP-to-Tel calls are assigned to the
channels of the Trunk Group.
 [0] By Dest Phone Number = The channel is selected according
to the called (destination) number. If the number is not located,
the call is released. If the channel is unavailable (e.g., busy), the
call is put on call waiting (if call waiting is enabled and no other
call is on call waiting); otherwise, the call is released.
 [1] Channel Cyclic Ascending = The next available channel in
the Trunk Group, in ascending cyclic order is selected. After the
device reaches the highest channel number in the Trunk Group,
it selects the lowest channel number in the Trunk Group, and
then starts ascending again.
 [2] Always Ascending = The lowest available channel in the
Trunk Group is selected, and if unavailable, the next higher
channel is selected.
 [3] Cyclic Descending = The next available channel in
descending cyclic order is selected. The next lower channel
number in the Trunk Group is always selected. When the device
reaches the lowest channel number in the Trunk Group, it
selects the highest channel number in the Trunk Group, and
then starts descending again.
 [4] Always Descending = The highest available channel in the
Trunk Group is selected, and if unavailable, the next lower
channel is selected.
 [5] Dest Number & Cyclic Ascending = The channel is selected
according to the called number. If the called number isn't found,
the next available channel in ascending cyclic order is selected.
Note: If the called number is located, but the port associated
with the number is busy, the call is released.
 [6] By Source Phone Number = The channel is selected
according to the calling number.
 [7] Trunk Cyclic Ascending = The channel from the first channel
of the next trunk (adjacent to the trunk from which the previous
channel was selected) is selected. (Applicable only to digital
interfaces.)
 [8] Trunk & Channel Cyclic Ascending = The device implements
the Trunk Cyclic Ascending and Cyclic Ascending methods to
select the channel. This method selects the next physical trunk
in the Trunk Group, and then selects the B-channel of this trunk
according to the Cyclic Ascending method (i.e., selects the
channel after the last allocated channel). (Applicable only to
digital interfaces.)
For example, if the Trunk Group includes two physical trunks, 0
and 1:
For the first incoming call, the first channel of Trunk 0 is
selected.
For the second incoming call, the first channel of Trunk 1 is
selected.
For the third incoming call, the second channel of Trunk 0 is
selected.
 [9] Ring to Hunt Group = The device allocates IP-to-Tel calls to
all the FXS ports (channels) in the Hunt Group (i.e., a ringing
group). When a call is received for the Hunt Group, all
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