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Rewrite Rules
DMR Gateway will only pass traffic to the different networks if it's referenced in a rewrite rule in the .ini file.
TGRewrite allows you to translate one talk group ID to another, and to alter the time slot. TGRewrite can also be used to route a talk group and slot combination to a particular network. 'from' applies to DMR frames entering the Gateway via MMDVMHost (RF), and 'to' is where they are routed on the network side (Net). The rules apply to DMR frames traversing the gateway in both directions.
TGRewrite=fromSlot,fromTG,toSlot,toTG,range
The rule below will translate a group call to talk group talk group 8 to talk group 9 on DMR Network 1.
[DMR Network 1]
# Reflector TG on to slot 2 TG8
TGRewrite=2,8,2,9,1
The rules below will route a group call to 9990 on time slot 1 to DMR Network 1, and a group call to 9990 on time slot 2 to DMR Network 2.
[DMR Network 1]
# Echo on slot 1 TG9990
TGRewrite=1,9990,2,9990,1
[DMR Network 2]
# Echo on slot 2 TG9990
TGRewrite=2,9990,2,9990,1
This is almost identical to the TGRewrite except it only operates on private calls. PCRewrite can be used to add a prefix on a private call to a reflector to 'steer' them to a particular network. The prefix will then be removed before being routed to the DMR network. The rules apply to DMR frames traversing the gateway in both directions. This rule only works on DMR frames passing from the RF side to the network.
Typically used to remap reflector control calls to a different local range to avoid clashes, and for permitting GPS position reports and private calls to a particular network.
PCRewrite=fromSlot,fromId,toSlot,toId,range
The rules below will route any private calls on time slot 2 in the range 94000 - 95000 to 4000 - 5000 on DMR Network 1, and the range 84000 - 85000 to 4000 - 5000 on DMR Network 2.
[DMR Network 1]
# Reflector control command slot 2 94000->4000 to 95000->5000
PCRewrite=2,94000,2,4000,1001
[DMR Network 2]
# Reflector control command slot 2 84000->4000 to 85000->5000
PCRewrite=2,84000,2,4000,1001
SrcRewrite will rewrite the source/from Talk Group ID to another ID.
SrcRewrite=fromSlot,fromId,toSlot,toTG,range
The rule below will rewrite calls from 4000-5000 on DMR Network 1, to talk group 9 on slot 2. This is useful for ensuring reflector announcements are heard on talk group 9. This rule only works on DMR frames passing from the network side to the RF side.
[DMR Network 1]
# Reflector status returns
SrcRewrite=2,4000,2,9,1001
TypeRewrite maps a group call to a private call. This rule only works on DMR frames passing from the RF side to the network side.
TypeRewrite==fromSlot,fromId,toSlot,toId
The rules below translate a group call to 9990 on slot 1, to a private call on DMR Network 1. The SrcRewrite rule then allows the reply to traverse the gateway.
This could be used for converting Brandmeister's private call echo service to a group call method like DMR+, to make the usage more uniform across the networks.
[DMR Network 1]
# Echo on RF slot 1 TG9990 to network slot 1 9990
TypeRewrite=1,9990,1,9990
SrcRewrite=1,9990,1,9990,1
Passes all talk groups without specific matching rules, and can only be used on a single DMR network. The rules apply to DMR frames traversing the gateway in both directions.
PassAllTG=Slot
The rules below allow group calls to traverse from DMR network 2 to either time slot on the RF side.
[DMR Network 2]
# Pass all of the other talk group traffic on slot 1 and slot 2
PassAllTG=1
PassAllTG=2
Passes all private calls without specific rules, and can only be used on a single DMR network. The rules apply to DMR frames traversing the gateway in both directions.
PassAllPC=Slot
The rules below allow private calls to traverse from DMR network 2 to either time slot on the RF side.
[DMR Network 2]
# Pass all of the other private traffic on slot 1 and slot 2
PassAllPC=1
PassAllPC=2