1.5 Overview For a GTR 8000 Base Radio in a Trunked Single-Site Repeater Configuration
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 2610 or 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 1-2
Single-Site Repeater Configuration 1
If the distance between the first non-colocated base radio and subsequent non-colocated base radios is less than 328
ft (100 m), a single Ethernet LAN switch can be used to distribute the site controllers call control signaling to those
non-colocated base radios. The stated distance limit for a shielded twisted pair Ethernet cable (CAT5) is 328 ft
(100 m) before the signal degrades too much to be used. See
6871022P86-B - July 2013
1-5