Specifications

December 2008 Page 2–11
Chapter 2. System Application and Ordering
2
The 64V module is identified on the channel
module as 64K. The same physical channel
module is used for both the 64V and 64R designa-
tions; however the 64V module supports a V.35
electrical or optical interface. The rear interface
module is labeled 64V/R and has a 25-pin female
D-shell connector.
The 6NE module allows connection of any IEEE
802.3 10/100 Ethernet compliant device to any
FOCUS chassis extending the Local Area
Network (LAN) via the FOCUS system. A single
6NE module allows the user to route to two inde-
pendent T1/E1 interface links, allowing a true
add/drop using just one 6NE. Ethernet switching
functions ensure that data will be transmitted to
the corresponding remote devices only, reducing
unnecessary traffic through the T1/E1 link.
The 6NF module is used to connect IEEE C37.94
compliant devices to the FOCUS multiplexer.
This eliminates the cost and interference problems
inherent with metalic circuits. The IEEE C37.94
standard was developed specifically to interface
protective relays to communications equipment
via fiber.
The 6NR/6NV module (which is RS-422/V.35
compliant) can be used wherever synchronous
bandwidth greater than a single DS0 is required.
This is sometimes referred to as fractional T1/E1.
The CTR module provides eight independent, bi-
directional contact status transfer functions per
module. The rear interface module has two 16-
point compression type terminal blocks.
The DCU module is a DDS (Digital Data Service)
channel module. It provides the interface between
a DS0 timeslot of a T1 stream and a 4-wire
metallic wire network. For example, you would
use a DCU module between your FOCUS system
and a CSU/DSU controlled circuit, or another
FOCUS chassis with a DCU module connected to
a metallic wire network.
The optional FCA module enables your FOCUS
equipment to communicate with different types of
software using SNMP version 1 communications.
Communications can be within a network loop or
between one network loop and another. SNMP
management application tools are available from
several vendors for administering the configura-
tion of events notification (traps) and recipients of
traps. The FCA permits a pc running FCS to
connect to the FOCUS via the rear RJ-45 Ethernet
connector.
Similar to V2W except used with some remote
FXO modules requiring inverted signaling.
Channel modules require either one or two chassis
slots. They each control either one or two channel
time slots. The base chassis has space for any
combination of channel modules occupying no
more than twelve chassis slots. If additional space
is required, an expansion chassis must be used in
conjunction with the base chassis. An additional
twelve chassis slots are available in the expansion
chassis. Refer to Table 2-5 for the chassis and time
slot requirements for each channel module.
The HCB Pilot Wire module provides an ideal
pilot wire with nearly ideal impedance and shunt
capacitance. The HCB module also provides a
Pilot Wire Interface Module
for the HCB/HCB-1 relay
HCB-2T
HCB-3T
Foreign Exchange
FXS
FOCUS Communications Agent
FCA
Data Channel Unit
DCU
Contact Transfer Module
CTR
Fractional T1/E1 Module
6NR/V
IEEE C37.94
Compliant Module
6NF
Ethernet Switch
6NE
High Speed Data Module
64V