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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. Typically used to remap reflector control calls to a different local range to avoid clashes. This rule only works on DMR frames passing from the RF side to the 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
This is currently unused and may be withdrawn in its current form. It maps a single private call destination ID to a TG.
TypeRewrite==fromSlot,fromId,toSlot,toId
Currently not included in the default .ini file, it may be reworked to allow the BrandMeister echo command to be used as a talk group rather than a private call.
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