To facilitate Roaming on the Galway Digital Repeater Network it is necessary to modify the allocation of Static Talk Groups to all Repeaters within the Galway Digital Network.
It
is essential to modify code plugs to accommodate the following changes
to prevent QRM and the same channels appearing simultaneously on both
Time Slots of the Galway Repeater Network.
By modifying Code Plugs it will only be necessary to go into the channels and click on the Time Slot box and simply change it to either Time Slot 1 or Time Slot 2 as applicable. We appeal to all users of the Galway Network to make these modifications as soon as possible.
A new facility added will be the implementation of The Galway Digital Radio Group Cluster, TG 8, on Time Slot 2, and the Connacht Cluster on Time Slot 1 on each of the Repeaters within the Galway Digital Repeater Network.
A Cluster is defined as a small group or Repeaters in a region which have a common Talk Group connected to each of them.
Time Slot 2
By modifying Code Plugs it will only be necessary to go into the channels and click on the Time Slot box and simply change it to either Time Slot 1 or Time Slot 2 as applicable. We appeal to all users of the Galway Network to make these modifications as soon as possible.
A new facility added will be the implementation of The Galway Digital Radio Group Cluster, TG 8, on Time Slot 2, and the Connacht Cluster on Time Slot 1 on each of the Repeaters within the Galway Digital Repeater Network.
A Cluster is defined as a small group or Repeaters in a region which have a common Talk Group connected to each of them.
Allocations of Static Talk Groups
Time Slot 2
TG 2722 (Irish Call Channel) will remain as a Static Talk Group.
TG 8 (Galway Digital Radio Group Cluster) will be a new Static Talk Group
TG 9 is for LOCAL REPEAT and any call on this Talk Groups will not pass through the Network but be repeated only on the Local Repeater.
Please try to confine the use of Time Slot 2 for the channels above to allow QRM Free-Roaming facilities on the Static Channels.
Once a QSO has been established on TG 2722 simply QSY to TG2723 or TG 2724 on Time Slot 1
UK Channels may be activated on Time Slot 2
Caution
The use of TG 2723 on Slot 2 will result in simultaneous transmission on both Time Slot 1 and Time Slot 2 and will cause unnecessary QRM. TG 2723 is set as a Roaming channel to allow a conversation to be carried out whilst mobile throughout the Galway Network.
Time Slot 1
TG 2723 (Irish Chat Channel) will become a Static Talk Group on Slot 1
TG 7 (The Connacht Cluster) will become a Static Talk Group on Slot 1
TG 8 (Galway Digital Radio Group Cluster) will be a new Static Talk Group
TG 9 is for LOCAL REPEAT and any call on this Talk Groups will not pass through the Network but be repeated only on the Local Repeater.
Please try to confine the use of Time Slot 2 for the channels above to allow QRM Free-Roaming facilities on the Static Channels.
Once a QSO has been established on TG 2722 simply QSY to TG2723 or TG 2724 on Time Slot 1
UK Channels may be activated on Time Slot 2
Caution
The use of TG 2723 on Slot 2 will result in simultaneous transmission on both Time Slot 1 and Time Slot 2 and will cause unnecessary QRM. TG 2723 is set as a Roaming channel to allow a conversation to be carried out whilst mobile throughout the Galway Network.
Time Slot 1
TG 2723 (Irish Chat Channel) will become a Static Talk Group on Slot 1
TG 7 (The Connacht Cluster) will become a Static Talk Group on Slot 1
TG 9
is for LOCAL REPEAT and any call on this Talk Group will not pass through
the Network
TG 2724 (YSF.IE DMR > Fusion Link
Activate International Channels on Time Slot 1.
Logic of above changes:
1) More efficient use of both Time slots throughout the Galway Digital Repeater Network
2) By moving from TG 2722, on Time Slot 2 to TG 2723, on Time slot 1 will free up the Calling Channel on Time Slot 2 whilst the “Rag Chew" can take place on Time Slot 1
3) Roaming can be carried out on both Time Slots with less chance of QRM
Roaming
With the improved layout, Roaming may be carried out on both Time Slots with minimal QRM. Set up TG 8 on Time Slot 2 for local operation between operators within the catchment area of the Galway Network
Slot 1 will be set up for roaming on TG 2723, necessary when in QSO on the Chat Channel. TG7 will see much less use but can remain set up for Roaming on Time Slot 1.
Examples:
All Bridges to other modes such as Analog, D-Star, Fusion, and P25 may be used on Time Slot 1.
We emphasise that these may >>NOT<< be used on time Slot 2
Gateway Operation
Operation on Gateways or Hotspots is traditionally on Time Slot 2 as these devices only work on one Time Slot. No changes need to be made to code Plugs for use on Gateways of Hotspots.
t ofacilitate this service
Clusters do not function on Gateways, however, an entry into a Cluster on a specific Regional Network may be made by selecting the appropriate Talk Group associated with it as shown below:
TG 2724 (YSF.IE DMR > Fusion Link
Activate International Channels on Time Slot 1.
Logic of above changes:
1) More efficient use of both Time slots throughout the Galway Digital Repeater Network
2) By moving from TG 2722, on Time Slot 2 to TG 2723, on Time slot 1 will free up the Calling Channel on Time Slot 2 whilst the “Rag Chew" can take place on Time Slot 1
3) Roaming can be carried out on both Time Slots with less chance of QRM
Roaming
With the improved layout, Roaming may be carried out on both Time Slots with minimal QRM. Set up TG 8 on Time Slot 2 for local operation between operators within the catchment area of the Galway Network
Slot 1 will be set up for roaming on TG 2723, necessary when in QSO on the Chat Channel. TG7 will see much less use but can remain set up for Roaming on Time Slot 1.
Examples:
- · TG 27250 - Connacht (Cluster TG7 - Slot 1)
- · TG 27251 - Leinster (Cluster TG7 - Slot 1)
- · TG 27252 - Munster (Cluster TG7 - Slot 1)
- · TG 27253 - Ulster (Cluster TG7 - Slot 1)
- · TG 27254 - Southern Ireland Repeater Group (Cluster TG8 - Slot 2)
- · TG 27255 - Galway Digital Radio Group (Cluster TG8 - Slot 2)
All Bridges to other modes such as Analog, D-Star, Fusion, and P25 may be used on Time Slot 1.
We emphasise that these may >>NOT<< be used on time Slot 2
Gateway Operation
Operation on Gateways or Hotspots is traditionally on Time Slot 2 as these devices only work on one Time Slot. No changes need to be made to code Plugs for use on Gateways of Hotspots.
t ofacilitate this service
Clusters do not function on Gateways, however, an entry into a Cluster on a specific Regional Network may be made by selecting the appropriate Talk Group associated with it as shown below:
TG 27255 - Galway Digital Radio Group (Cluster TG8 - Slot 2)
RSGB Radio News
The RSGB Radio news is read on DMR TG 2354 on Sunday mornings at 12 midday. The Galway Network temporarily switches to a Static Talk Group mode at 11:30 - 13:30pm
IRTS Radio News Service
The IRTS Radio News is read at 8pm on Sunday Evenings via TG8, the Galway Cluster. For those outside of the Galway DMR Repeater coverages, use TG 27255 on your hotspot or Via your local Repeater of Gateway.
In Conclusion
The decision to make these changes has not been taken lightly. By making these changes your code plug will be compatible with the layout of the Southern Ireland Repeater Network and the layout suggested on the Brandmeister Wiki for Ireland. This will reduce QRM and ensure a trouble-free operation of the system in future.
These changes will be implemented mid-June 2020 and with therefore leave plenty of time for operators to make the necessary changes to their Code Plugs.
