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E. Connectors, Cables, and Pin Assignments
9128-A2-GB20-80 September 2002
E-7
COM Port-to-Router Cables
The following tables provide the pin assignments for connecting the 1-slot
FrameSaver unit’s 25-position communication port to various router auxiliary
(AUX) or console ports using standard cables.
Cisco 2500 Series Router – RJ45 Jack
Cisco 7000 Series Router – DB25 Plug
COM Port
Direction
AUX Port
Signal DB25 Pin # RJ45 Pin # Signal
DCE Transmit Data
(TXD)
2 To DTE 3 DTE Transmit Data
(TXD)
DCE Receive Data
(RXD)
3 From DTE 6 DTE Receive Data
(RXD)
DCE Request to
Send (RTS)
4 To DTE 1 DTE Request to
Send (RTS)
DCE Clear to Send
(CTS)
5 From DTE 8 DCE Clear to Send
(CTS)
DCE Data Set
Ready (DSR)
6 From DTE 7 DCE Data Set
Ready (DSR)
DCE Signal Ground
(SG)
7 — 4, 5 DTE Signal Ground
(SG)
DCE Data Terminal
Ready (DTR)
20 To DTE 2 DTE Data Terminal
Ready (DTR)
COM Port
Direction
AUX Port
Signal DB25 Pin # DB25 Pin # Signal
DCE Transmit Data
(TXD)
2 To DTE 2 DTE Transmit Data
(TXD)
DCE Receive Data
(RXD)
3 From DTE 3 DTE Receive Data
(RXD)
DCE Request to
Send (RTS)
4 To DTE 4 DTE Request to
Send (RTS)
DCE Signal Ground
(SG)
7 — 7 DTE Signal Ground
(SG)
DCE Carrier Detect
(CD)
8 To DTE 8 DTE Carrier Detect
(CD)
DCE Data Terminal
Ready (DTR)
20 To DTE 20 DTE Data Terminal
Ready (DTR)