CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 55)

Chapter 4 Data Interfaces
Multi-Channel Interfaces
55
Table 4-8. RS-366A Adapters
4.6.2 RS-449/422 Interface
This interface complies with EIA Standard RS-449. Electrical characteristics comply with RS-422
for clock and data signals and RS-423 for control signals. The interface uses the physical
connector type and pinouts specified in RS-449 (refer to Table 4-9). The RS-449/422 interface
uses a 37-pin, female D-Type connector for the physical connection.
Table 4-9. RS-449 Pinouts for Model MC1
Pin
Number
A/B
RS-449 Pin
Name (abbrev)
(full name) Direction
1 SHLD shield -
4/22 SD send data to modem
5/23 ST send timing from modem
6/24 RD receive data from modem
7/25 RS request to send to modem
8/26 RT receive timing from modem
9/27 CS clear to send from modem
10 LL local loopback to modem
11/29 DM data mode from modem