8
RISC ROUTER EXPANDABLE
Table 2-1. Pin Assignments for the Wide Area Network Port.
RS-449 EIA-530 RS-232 V.35 Circuit
1 1 1 A Shield
2 — 12 — Signaling Rate
3 — — — Spare
4 2 2 P Send Data (D)
5 15 15 Y Send Timing (A)
6 3 3 R Receive Data (A)
7 4 4 C Request To Send
8 17 17 V Receive Timing (A)
9 5 5 D Clear To Send (A)
10 18 — — Local Loopback
11 6 6 E Data Set Ready (A)
12 20 20 E Terminal Ready (A)
13 8 8 F Receiver Ready (A)
14 21 — — Remote Loopback
15 — 22 — Incoming Call
16 — 23 — Select Frequency
17 24 24 U Terminal Timing (A)
18 25 — — Test Mode
19 7 7 B Signal Ground
20 — 7 B Receive Ground
21 — — — Spare
22 14 — S Send Data (B)
23 12 — AA Send Timing (B)
24 16 — T Receive Data (B)
25 19 — — Request To Send (B)
26 9 — X Receive Timing (B)
27 13 — — Clear To Send (B)
28 — 25 — Terminal Service
29 22 — — Data Set Ready
30 23 — — Terminal Ready (B)
31 10 — — Receiver Ready (B)
32 — — — Select Standby
33 — 21 — Signal Quality
34 — 18 — New Signal
35 11 — W Terminal Timing (B)
36 — — — Standby Indicator
37 — 7 B Send Common
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