Milwaukee Public Safety and Services (P25) Trunking Research
From The RadioReference Wiki
Unidentified Talkgroups on Milwaukee Public Safety and Services (25) System
1001 Unknown User/Usage
1008 Unknown User/Usage
1173 Unknown User/Usage
Inter RF Subsystem Interface (ISSI) Talkgroups
These show up as patches to other systems (Milwaukee 800Mhz OpenSky, Milwaukee County/Waukesha County OASIS, and Wisconsin WISCOM)
Unsure if these are permanent assignments or a pool of talkgroups that are randomly assigned by the system; additional monitoring is needed.
63058 ISSI Patch Talkgroup
63075 ISSI Patch Talkgroup
63090 ISSI Patch Talkgroup