• Repeaterbook DMR Directory

Repeaterbook.com understands that DMR is a digital format that operates at a bandwidth of 12.5 kHz. DMR can control access to the repeater with a color code. It is much like CTCSS, but the signal is sent outside of the digital voice frame.

DMR incorporates talk groups and the available talk groups are tracked by Repeaterbook.com. They can belong to large networks, which is also tracked by Repeaterbook.com.

Repeaterbook.com utilizes two APIs to supplement repeater data.

In order to use DMR through IPSC servers, each DMR appliance (radio, repeater, hot spot, etc.) needs to have a DMR ID. For the amateur radio service, these can be obtained through Radioin.net. Radioid.net maintains a complete database of all assigned DMR IDs and who, or what, the ID was assigned to. Repeaterbook.com queries the database in two ways.

1. Repeaterbook queries the repeater call sign and frequency to obtain the DMR ID.
2. Repeaterbook queries the DMR ID to obtain the color code and IPSC information.

Radioid.net rules require a registrant to use their own call sign and not the repeaters call sign. In some circumstances, a repeater may have a club call sign, or other call sign, that is not the same call sign as the individual requesting the DMR ID. When this occurs, Repeaterbook may not successfully retrieve the repeater's DMR ID from the API. In this case, no information is retrieved. Repeaterbook admins should not assume that the repeater record is invalid if the DMR ID cannot be obtained via the frequency and call sign of the repeater. There are other search parameters, such as frequency and location, that can be utilized to try to find the DMR ID. If the DMR ID is manually entered into a repeater record, that ID is used to obtain the information from the API since the ID is a unique value in the record.

The API is queried by Repeaterbook whenever a repeater is edited or moderated at the admin level. It is also automatically queried when a new DMR repeater is added to the database.