M160 Internet Router Hardware Guide
DB-25 Pin Signal V.35 Pin Description
12 TC AA Trans mit Clo ck
17 RC VReceive Clo ck
9RC
XReceive Clock
1FGND
AProtective Ground
7GND
BSignal Ground
8 DCD F D ataCar rier Detect
Table 35: DB-25 Connector to DB-15 (X.21) Connector Pinout
DB-25 Pin Signal DB-15 (X.21) Pin Description
1FGND1Protective Ground
7GND8SignalGround
2T2TransmitData
14T9TransmitData
3R4Receive Data
16 R11 Re c e i v e Dat a
4C3Request To Send
19 C 10 Requ est ToS end
8I5 Data Carrier Detect
10 I12 Data Carrier Detect
17 S 6 Receive Clock
9S13
Receive Clock
Fast Ethernet 48-port Cable Pinouts

The FastEthernet 48-port PIC has four VHDCI connector ports on itsfaceplate (see

Figure 121),each of which accepts one of the four RJ-21 cables suppliedwith the

PIC (see Figure 122). Each VHDCI connector port supports 12 Ethernet ports.

274 Fast Ethernet 48-port Cable Pinouts