16 System Feature Overview
over-the-air, the analog call will be denied access. The repeater notifies the console via a channel
busy tone generated over the speaker and Rx audio pins on the 4-wire repeater interface. Analog
consoles do not have priority over digital calls (voice or data) in DMM mode.
Dynamic Mixed Mode is a repeater only configuration and the main functions of this feature are:
• The system requires one pair of physical channels (one Tx frequency and one Rx
frequency) for both analog and digital calls, one MOTOTRBO repeater, and one set of
RF equipment (antenna, combiners, couplers, LNA, etc) to enable analog and digital
radio users to communicate.
• This configuration allows the user to have a mix of legacy analog radios and the digital
MOTOTRBO radios in a MOTOTRBO system.
• The repeater supports two independent time slots or logical channels within the 12.5
kHz physical channel bandwidth while repeating digital calls. However, the repeater
supports one voice path (transmit and receive) on a 25 kHz or 12.5 kHz channel while
repeating analog calls.
Dynamic Mixed Mode does not support the following configurations/features.
• IP Site Connect configuration - This means that in Dynamic Mixed Mode, the
repeater can only repeat the digital calls over-the-air and cannot send the voice/
data packets over the IP network. The status of the repeater and the control of the
repeater cannot be performed from a remote PC application like RDAC-IP.
• Capacity Plus configuration - This means that in Dynamic Mixed Mode, trunking
the logical channels of multiple MOTOTRBO repeaters as per Capacity Plus is not
supported.
• FCC Type-I and Type-II monitoring - Since FCC Type-I and Type-II monitoring are
not supported in single site analog operation in any of the earlier MOTOTRBO
releases, it is also not supported in Dynamic Mixed Mode single site operation.
• Transmit Interrupt feature - The Voice Interrupt, Emergency Voice Interrupt,
Remote Voice Dekey, and Data Over Voice Interrupt features are presently not
supported in Dynamic Mixed Mode systems.
• RDAC over IP feature - RDAC over local USB and connections via GPIO are
supported. RDAC over the network is NOT supported.
• Repeater Knockdown - In Dynamic Mixed Mode systems, this feature is not
supported during an ongoing digital transmission.
• PTT on a 4-wire interface - In Dynamic Mixed Mode systems, this feature is not
supported during a digital repeat operation.
2.2.1.4 IP Site Connect Mode
When operating in IP Site Connect Mode, MOTOTRBO combines the logical channels of multiple
MOTOTRBO systems (operating in digital repeater mode at dispersed locations) into one logical
channel covering all locations. In this mode, repeaters across dispersed locations exchange voice
and data packets over an IPv4-based back-end network. There are three main functions of this
mode.
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