Specifications

extra circuitry to permit extending RS-485 LANS
between stations. All versions support a total of
four 0-9600 bps asynchronous data channels over
two DS0 channels.
For remote telephone extension, the V2T-a for a-
law, V2T-u for u-law modules are installed at the
node where the station PBX is located. The V2T
rear interface module has two RJ-9 jacks and a two-
channel compression type terminal block. (The
FXO is used where inverted signaling bits are
required for interfacing with certain other manufac-
turers’ T1 multiplexers, i.e. NEC).
The V2W-a for a-law, V2W-u for u-law modules
are used for two-wire modems and remote
telephone extension. The V2W rear interface
module has two RJ-9 jacks and a two-channel
compression type terminal block.
The V4W-a for a-law, V4W-u for u-law modules
can be used with four-wire modems or existing
audio tones. The rear interface module has two
eight-point compression type terminal blocks.
Four-wire voice with E&M
signaling
V4W
Two-wire voice originating (FXS
type)
V2W
Two-wire voice terminating (FXO
type)
V2T
Page 2–14
FOCUS System Manual
Table 2–5. Channel Module Chassis Slot
and Time Slot Requirements
* 2 time slots when used in an APM system
** Depending on n value
Channel Chassis
Time Slots
Modules Slots
232 1 1 or 2
64F 1 1
64G 1 1
64R 1 1
64V 1 1
6NE 1 1**
6NF 1 1**
6NR/6NV 1 1**
CTR 2 1
DCU 1 1
FCA slot 12 only 0
HCB 2 1
HCB-3T 4 2
PBT 1 1
PBW 1 1
PLD 1 1*
PRI 2 1
PRS 2 1
SPD 2 1
SRD 1 1 or 2
V2T 1 1 or 2
V2W 1 1 or 2
V4W E&M 1 1 or 2