Overview For A Gtr 8000 Base Radio In A Trunked Single-Site Repeater Configuration - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 1: GTR 8000 Base Radio Description
A maximum of 28 base radios can be installed at the site. Each base radio has either an Ethernet
connection to a site LAN switch or an Ethernet connection to both site controllers at the site, depending
on the site configuration. See the Repeater Site Infrastructure Feature Guide manual for details.
Besides the power supply module supporting the transceiver and power amplifier modules, the power
supply can also provide auxiliary power to a connected site controller.
An ASTRO ® 25 repeater site can also support a mix of GTR 8000 Base Radios and standalone
10Base-T Ethernet Epic IV or Epic VI QUANTAR ® stations, or STR 3000 Base Radios.
If a mix of GTR 8000 Base Radios and QUANTAR ® stations are at an ASTRO ® 25 repeater site,
SNMPv1 and clear SWDL support is used at the site.
1.6
Overview For a GTR 8000 Base Radio in a Trunked Single-Site
Repeater Configuration
This configuration consists of standalone GTR 8000 Base Radios and standalone GCP 8000 Site
Controllers in a single-site repeater configuration, or can be used in a multi-site system to provide a
system migration step that enables replacement of PSC 9600 Site Controllers or base radios other
than the GTR 8000 Base Radios. The base radios may be colocated with the site controllers, or be
separated (non-colocated) from the site controllers.
NOTICE: This configuration can only be used in non-voting configurations.
Support is provided only for FDMA when the base radios are physically separated from and not
colocated with the site controllers. TDMA requires the use of a frequency reference and timing
reference that can only be provided through the CP3 links on the site controller, which cannot be
extended to non-colocated base radios when the distance exceeds the noted limits. This configuration
is supported only on repeater sites.
An Ethernet cable is used to extend the site controllers signal to the first non-colocated base radio
through the site controllers Net AUX port into the base radios SC-A port. The site controllers Net AUX
port must be enabled and configured using the CSS for 100/FULL (speed and duplex). When the
distance between the site controllers and the first non-colocated base radio exceeds 328 ft (100 m), an
external HP 2620 24-port Ethernet LAN switch must be used to extend the site controllers signal.
When there are additional non-colocated base radios and those base radios are more than 328 ft (100
m) from the previous non-colocated base radio, additional Ethernet LAN switches are required to
continue to extend the signal of the site controller. See Figure 2: Single-Site Repeater Configuration 1
on page 33.
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