Voice and data sharing the same network

The 619SRI can be configured to provide voice and data segregation on a shared network by distinguishing between two different CTCSS tones and creating two separate paths, one for data and one for voice. This reduces hardware costs by allowing voice and data units to share the same repeater network.

In the above example, Port-3 is setup to act on either of two CTCSS frequencies: T1 (100.0Hz) or T2 (118.8Hz). Port-1, the voice link, is configured to receive and transmit T1 and Port-5, the data link, is configured to use T2.

Voice traffic from Port-1 and Data from Port-5 are both routed to Port-3 where either of T1 or T2 is generated, depending on the initiating input. When a signal on Port-3 is detected with T1, the SRI steers the signal to the voice port only and generates T1. Conversely, when a signal on Port-3 is detected with T2, the SRI steers the signal to the data port only and generates T2 into the link.

 

 

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Reduce traffic at link-repeater sites

The 619SRI can be used to optimise voice and data traffic across a series of radio links by providing CTCSS steering and dynamic switching at the link ports. This allows separate voice and data networks to share a common link backbone.

In the above example, voice signals use CTCSS tone T1 (100.0Hz) and data traffic uses T2 (118.8Hz). Ports 1 and 8 are connected to the link and are setup to handle both CTCSS frequencies. Port-6 connects to a VHF voice network and is setup for T1 only. Port-3 connects to a UHF data network and is setup for T2 only.

During operation, traffic on either of the link ports is always routed to the other by default but is only routed to either of the voice or data ports depending on the received CTCSS tone. Hence, audio is dropped from a link port onto one of the network ports, depending on whether it is determined to be voice or data. This is achieved through CTCSS steering of T1 and T2 at the link ports.

 

 

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Eliminate long delays in multi-hop links

The 619SRI incorporates a fast CTCSS mode that is designed to eliminate long delays in multi-hop links. When configured correctly, fast CTCSS causes the PTT to be asserted, in anticipation of a forth-coming CTCSS tone.

 

In the above example, the link backbone is to be keyed as fast as possible, using a given CTCSS tone (100.0Hz). The link ports are configured as Ports 1 and 5. Port-3 is used to connect a repeater network. All three ports are setup for Fast CTCSS on frequency 100.0Hz. Each port is also configured to generate 100.0Hz.

When the COS input of Port-1 activates, PTTs are immediately asserted on Ports 3 and 5, and a 100.0Hz CTCSS tone is generated on each of those ports. If the required CTCSS tone is not detected within a given time period then the outputs are deactivated, regardless of the COS input state. If the tone is detected the outputs will remain active until either the COS is removed or the tone is lost. And to reduce the effects of possible false triggering, a temporary lockout feature can also be applied.

 

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