unication G4 Configuring

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Page 1Configuring the G4/5 For QCII over P25 Operation1. OverviewQCII over P25 offers a number of advantages for implementing a paging solution on a P25 System.They are:• Minimizes use of TGIDs• Minimal Dispatching process change• Pager behavior closely matches that of the Minitor/G1 Analog pagers• Works over Motorola ABME++ Capable RF• Uses the identical QCII Tone set as Motorola• Works with Wireless and IP connected Console environmentsIn the following sections a detailed review of QCII coding, Tone Sets and ways to configure the G4 orG5 to support various behaviors are provided.2. How Does QCII over P25 Work?QCII over P25 uses a Talk Group ID (TGID) and it is over this TGID’s assigned Talk Channel that theQCII, 2-Tone, ID is sent. Many Dispatch Centers will patch analog VHF/UHF Channel traffic to a P25TGID so Portable and Mobile users can hear these transmissions. In such applications adopting toQCII over P25 paging should be straightforward.There are differences between a standard analog 2-Tone frequency set and the set used for QCIIover P25 paging. Refer to Figures 1 and 2 on the following pages.Figure 1 is an example of a Motorola analog 2-Tone set and one can see the tone frequencies aredefined and their spacing runs 3-6%.In Figure 2, QCII over P25 defines frequency range of 31.25 to 62.5Hz for each of its 72 groups.Any frequency that falls into a specific range is decoded the same. So, for example, if an analogtone of 349Hz is patched to a P25 TGID, it will get decoded as Index 3. And, an analog tone of330.5Hz will also get decoded as Index 3.The significance of these differences and how one programs a G4/5 for QCII over P25 will beexplained in a later section.