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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
OL-14126-12
Chapter 3 Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs
4-Port Serial Interface SPA Overview
Figure 3-40 shows the Smart Serial cable connectors.
Figure 3-40 Smart Serial Cable Connectors
Table 3-39 lists the connector pinouts for the Smart Serial connectors that interface at the 4-Port Serial
Interface SPA ports.
Router connections
EIA/TIA-449 V.35 X.21
Network connections at the modem or CSU/DSU
205059
EIA/TIA-232 EIA-530
Table 3-39 Smart Serial Connector Pinouts
Pin Signal Pin Signal
1 O_TXD/RXD+ 14 O_TXD/RXD-
2 O_TXCE/RXC+ 15 O_TXCE/RXC-
3 B_TXC/TXC+ 16 B_TXC/TXC-
4 I_RXC/TXCE+ 17 I_RXC/TXCE-
5 I_RXD/TXD+ 18 I_RXD/TXD-
6 B_DCD/DCD+ 19 B_DCD/DCD-
7 O_DTR/DSR+ 20 O_DTR/DSR-
8 O_RTS/CTS+ 21 MODE2
9 O_RTS/CTS- 22 MODE1
10 I_CTS/RTS- 23 MODE0
11 I_CTS/RTS+ 24 MODEDCE
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