Linked Capacity Plus allows up to 15 sites in a system. Each LCP site can have up to 6 trunked repeaters (12 logical channels) and 3 Data Revert repeaters (6 logical channels) per site. It is not a requirement to have the same number of repeaters at each site.
Let’s configure Linked Capacity Plus system consisting of 3 sites, 2 repeaters at each site. However the number of repeaters per site does not need to be the same.
Each radio ID (including subscriber radio ID and repeater ID) should be unique in the radio system. So it’s better to use idea of radio numeration.
For instance:1N- – 1st site repeaters, 2N – 2nd site repeaters, 3N – 3rd site repeaters, 100-999 – subscriber radios.
NOTE: Only repeaters with 32 MB of internal memory (e.g. DR 3000or MTR3000) can support the LCP configuration.
Let’s start with MASTER configuration.
Each LCP system needs one repeater to act as the Master. The Master repeater has a static IP address, while other repeaters can have static or dynamic IP addresses. All the repeaters in the LCP configuration register with the Master using the static IP address of the Master.
The Master’s IPv4/UDP address is configured into all the Linked Capacity Plus devices. The Master’s IPv4/UDP address refers to its address as seen from the backend network
According to diagram Master is located at the 3rd site.
Specify Radio ID according to your plan and enter Site ID - the ID of the site that the Repeater is on.
In our case Radio ID = 31 and Site ID = 3.
In Network Settings specify Link Type – Master
Master IP and UDP port - specify the IP Address and port number of the Master within the Link Establishment system. UDP is a protocol used for peer-to-peer services.
DHCP=OFF. Master IP address should be static.
Ethernet IP - specify the IP Address of the Master, the same as in the field Master IP.
Gateway IP - Gateway IP Address for a repeater using Link Establishment
Mask - Gateway Netmask Address for a repeater using Link Establishment
UDP port - the UDP port of the repeater within the Link Establishment system. It’s used for peer-to-peer services. The Master's UDP is set as the Peer's Master UDP Port in the Link Establishment system. UDP port=50000 by default.
The Master’s IPv4/UDP address is configured into all the Linked Capacity Plus devices.
At the same Network tab specify Rest Channel/Site IP and Rest Channel/Site UDP port.
Rest Channel/Site IP is virtual IP address that is required for correct operation of a LCP system. As the Rest Channel rotates through the channel pool of a site, this virtual IP address is associated with a different physical repeater only for the duration for which one of its slots is the Rest Channel. This IP address MUST be the same for all repeaters at the same site. Rest Channel/Site IP address should be at the same subnet as all repeaters of this site. No other device should use this IP address.
In a LCP system Rest Channel/Site UDP port allows the user to configure the UDP port of site for communication with other sites connected within a Linked Capacity Plus system.
Then open Sites tab.
For Master repeater you need to configure Sites map.
Please refer to the diagram of the Linked Capacity Plus system. In our case we have 3 sites, so 1st site has only one neighbor Site2. 2nd site has 2 neighbors – Site 1 and Site 3. And the last 3rd site has the only neighbor - Site 2.
If you need to reserve some channels for wide group call which keys up all sites, then specify how many channels are needed to be reserved for wide area transmissions for the site in the field Reserved Wide Area Channel.
In the Talkgroups tab, specify Wide Groups and site on which these groups are available. You don’t need to add Local groups which are available only on 1 site.
In our example we have only 2 Wide groups. Group 1 is Wide Group which is available on all sites. So when subscriber initiates a call to Group 1, this call will be transmitted on all sites. Group 2 is also Wide Group and is available for Site 2 and Site 3.
Configuration of the Linked Capacity Plus Channel is similar to configuration of Capacity Plus channel. Right-click on the Zone and select Add->Capacity Plus Voice Channel (Linked) or Capacity Plus Data Channel (Linked). Please remember that both channels of a repeater will be used for the same purpose. In LCP, a Data Revert Channel can be configured either as a local Data Revert Channel, or as a wide area Data Revert Channel.
In our configuration all repeaters will be used for voice, that’s why in Master repeater codeplug we add Capacity Plus Voice Channel (Linked).
Specify Color Code=1 (by default).
Color Code is used to identify a radio system. So different color codes are used to identify different systems. Channels may have the same or different color codes. A repeater can only have one color code. Radios will ignore any channel activity not containing the matching color code for that system. Repeaters using the same frequency may be associated with different color codes.
Specifies the Slot 1 channel ID for voice or data channels. This also determines the value for Slot 2 Channel ID which is always one increment higher than the value of Slot 1 Channel ID.
For Linked Capacity Plus data channel, the Repeater/Time Slot value of the subscriber radio must match this value.
Then let’s configure PEER REPEATER of site 1.
According to diagram and numbering idea, repeater locates at the 1st site and its Radio ID is 11, Site ID =1.
Open Network tab to configure network settings.
In Network Settings specify Link Type – Peer
Master IP and UDP port - specify the IP Address and port number of the Master within the Link Establishment system. UDP is a protocol used for peer-to-peer services.
Ethernet IP - specify the IP Address of the repeater. Master IP address (3rd site) and Peer repeater IP Address (1st Site) will be in different subnets, because each site should be located in different subnet.
Gateway IP - Gateway IP Address for a repeater using Link Establishment
Mask - Gateway Netmask Address for a repeater using Link Establishment
UDP port - the UDP port of the repeater within the Link Establishment system. It’s used for peer-to-peer services. The Master's UDP is set as the Peer's Master UDP Port in the Link Establishment system. UDP port=50000 by default.
At the same Network tab specify Rest Channel/Site IP and Rest Channel/Site UDP port.
Rest Channel/Site IP is configured in each repeater. Repeaters at the same Site will have the same Rest Channel IP Address. So in 10.150.2.n subnet, there is free IP address which is assigned to Rest Channel IP 10.150.2.58. So the second peer repeater of the 1st Site will use the same Rest Channel/Site IP.
Sites and Talkgroups are configured only in Master’s codeplug.
Right-click on the Zone and select Add->Capacity Plus Voice Channel (Linked)
Specify Color Code (the same as Color Code of the other repeaters) and Slot 1 Channel ID.
When configuring each new site, you need to start numeration from Slot 1 Channel ID = 1 again:
Site 3 (with Master): 1-2-Master ID = 31, 3-4-Peer ID = 32,
Site 1: 1-2-Peer ID = 11, 3-4-Peer ID = 12,
Site 2: 1-2-Peer ID = 21, 3-4-Peer ID = 22.
Other peer repeaters are configured with the same logic as described above.
During configuration, please keep in mind that:
- All repeaters from the same site should be in the same LAN
- Each repeater should have specified Master IP address/Port and Rest channel/Port.
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