Telex IP-223 - Manual (Page 84)

Setup Information
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Type Drop Down Menu
The Type drop down menu, shown in Figure 117 identifies the type of call for Sepura radio configuration.
Trunked GC (Group Call) – A half duplex point-to-multi-point call where immediate
communication takes place between the calling and the called users.
Trunked HDPC (Half Duplex Private Call) – A half duplex point-to-point call between caller and called units. Each
unit asks permission to transmit before each transaction.
Trunked UDSL (User Defined Scan List) – A scan of specific groups predefined in the radio and in the IP-223. A UDSL is
a collection of pre-defined talk group (or function tone) settings. The UDSL
string entered in the ISSI/GSSI Number field is separated by the semicolon. It
can accept up to 10 trunked groups.
Direct GC – Communication with other TETRA radios without the use of the network. This
is called DMO (Direct Mode Operation).
NOTE: For more information on TETRA operation and field programming, download the Sepura Application Note at
www.telex.com/radiodispatch
ISSI/GSSI Number Field
The ISSI/GSSI Number field identifies the group number or unit number for the selected Sepura radio type.
FIGURE 117. Type Drop Down Menu - Tetra Mode