CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 71)

2240 Fiber Optic Modem
71
4.6.2.2 RS-423 / DB-25 Interface
NOTE: The maximum data rate for this interface is 9.6 Kbps.
This interface is electrically compatible with EIA RS-423A. It will also operate
with asynchronous RS-232D systems.
This interface uses the physical connector type and pinouts specified in RS-232D
(refer to Table 4-I). The RS-423 / 232D interface uses a 25-pin, female D-type
connector for the physical connection. These signal channels operate
independently from the main data channel of the V.35 interface. A worst case
sampling jitter of 21 microseconds will be experienced on these channels.
There are six end-to-end control lead pairs. They are listed below with the input
signal listed first:
TD to RD
STD to SRD
DTR to RI
SRTS to SDCD
DSRS to SCTS
RTS to DCD
4.7 T1 / E1 Interfaces
4.7.1 Transparent Bipolar - Model s 4BX
NOTE: This interface replaces the 4T (1-3) and 4E (1-3) models.
It is completely compatible with these previous interface models.
The 4Bx interfaces are compatible with any bipolar, line-coded T1 or E1 data
(1.544 or 2.048 Mbps). All types of codes, including AMI, B8ZS, B7S or HDB3,
will be accurately transmitted/received. Five DIP switches are used in configuring
particular applications (refer to Table 4-M). Switch positions 1 and 2 select T1 or
E1. Positions 3 through 5 select line build out values for T1 usage.