AudioCodes Mediant 500L - Page 505

Version 7.2 505 Mediant 500L Gateway & E-SBC
User's Manual 23. Trunk Groups
Parameter Description
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.

[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).
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 telephones
connected to the FXS ports belonging to the Hunt Group start
ringing. The call is eventually received by whichever telephone first
answers the call (after which the other phones stop ringing). This
option is applicable only to FXS interfaces.
 [10] Select Trunk by Supp-Serv Table = The BRI port/module is
selected according to the settings in the Supplementary Services
table (see Configuring Multi-Line Extensions and Supplementary
Services on page 599), allowing the routing of IP-to-Tel calls to