
Figure 1-1. CC-500
DESCRIPTION
The CC-500 is a communications device that converts and combines up to four IEEE Std C37.94
fiber optic and up to six DS0 interfaces into a single backhaul. Backhaul options include a T1
electrical interface and a point-to-point singlemode fiber.
The CC-500 is designed to multiplex up to ten DS0 channels without the need to program or map
the channels. The physical ports on the CC-500 correspond directly with the I/Os on both ends of
the backhaul channel. A C37.94 channel connected to port 1 of the CC-500 will be mapped to port 1
of the corresponding CC-500 on the remote end of the backhaul channel. Port 2 will be mapped to
the remote unit’s port 2, and so on.
The CC-500 is DIP switch programmable for up to two backhaul options, depending on how it is
equipped. All CC-500s will come with T1 and MM C37.94 interfaces. A 1310 SM Laser or LED, or
a 1550 SM Laser is available as an option.
The T1 interface is designed to communicate point-to-point over a third party electrical T1 channel,
such as a leased T1 channel from a phone company. The master clock will be sourced from the T1
channel, and the CC-500 will act transparently in the communications path. If a master clock is not
available on the T1 circuit, the CC-500 will automatically sync with another CC-500.
For point-to-point fiber applications, the SM fiber channel is available.
While the CC-500 can be equipped with two backhauls, only one can be used at a time.
The CC-500 will multiplex up to ten DS0s. The unit consists of both a mother board (Control Unit)
and a sister board. The mother board contains the backhaul channel(s), power connections,
and four C37.94 fiber optic DS0 channels. The CC-500 will support any type of C37.94 format.
Multimode heads are standard, but singlemode heads are available as an option.
1-1
Section 1 GENERAL