CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 46)

46
Canoga Perkins
Table 4-B.
RS-449 Pinouts
* The extra clock is an enhancement added to -422 interfaces. Any -422
interface card outfitted with this capability can be identified via the lack
of the W16 / W15 BAL_CTRL jumper. The W16 / W15 jumper was
never described in the manual, so do not try to find a reference to it in the
manual.
Pin RS-449 Direction
Number PIN Name
A/B (abbrev) (full name)
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
12/30 TR terminal ready to modem
13/31 RR receiver ready from modem
14 RL remote loopback to modem
15 IC incoming call from modem
17/35 TT terminal timing to modem
18 TM test mode from modem
19 SG signal ground -
20 RC receive common - (tied to SG)
33 SQ signal quality from modem
34 NS new signal to modem
37 SC send common to modem
2/36* N/A extra clock for to modem
receive data