User's Manual

In this mode pressing the mobile's PTT will cause the mobile to transmit on the mode
shown on the control head display and cause the VRS to transmit to the portable. If the
portable is using a PL frequency then the VRS can be programmed to transmit the proper
PL. During portable-to-base repeat operations pressing the mobile's PTT will result in the
talk prohibit tone sounding momentarily and the mic audio will not be transmitted to the
portable. When the mic is off HUB all portable transmissions are heard at the mobile's
speaker. When the mic is on HUB only portable transmissions with the proper PL will
unmute the speaker. The following paragraphs detail how the VRS should operate in
<ICM Both> mode during different cases.
1. No VRS repeat operations in progress and the mobile user initiates a PTT.
• Mic-Hi line audio is routed to the VRS and transmitted to the portable.
• The mobile will key up and transmit mic audio to the base.
2. During a portable-to-base repeat operation, the mobile user initiates a mic PTT.
• A momentary talk prohibit tone will be heard and the mic audio will be
disabled.
3. During a base-to-portable repeat operation, the mobile user initiates a mic PTT.
• The base-to-portable repeat will be interrupted.
• Mic-Hi line audio is routed to the VRS and transmitted to the portable.
• The mobile will key up and transmit mic audio to the base.
• When the mobile mic PTT is released, the base-to-portable repeat will
continue if the mobile is still receiving a base transmission.
NOTE: If the VRS is in a non-priority state all portable transmissions will be
heard on the mobile's speaker. The above descriptions apply to a VRS unit in a priority
state.
Acknowledgment Tones
VRS Mobile-TX Acknowledgment Tones (Conventional Only)
When this option is enabled, the VRS transmits a feedback tone after it has received a
repeatable message on the portable frequency. This signals the portable operator that the
transmission was received. If the repeated message was cut short due to the mobile TOT
being exceeded or the mobile channel being changed during the repeat, a lower-pitched
tone sounds. If the portable user does not hear a tone after completing a transmission, the
portable is either out of range of the repeater or there is no priority repeater in the area.
VRS Mobile Trunking Tones (Trunking Only)
For trunked modes, the VRS regenerates the standard trunking access tones and transmits
them to the portable. These tones, which are essentially the same as those heard at the
mobile's speaker, are accessed with the "quick-key" feature. For this operation, the
portable user briefly (less than one second) presses the PTT button, and then listens for
one of the following tones:
o The "talk permit" tone (three short beeps) indicates to the portable user that the
trunking system has granted a voice channel to the mobile and that keying the portable
during the trunking system hangtime will result in acquiring this channel.
o The "system busy" tone (a telephone-like busy tone) indicates that, at the time the
portable user dekeyed, the trunking system had no voice channel available. If the user