Console And Auxiliary Port Considerations; Console Port Connections - Cisco uBR7100 Series Hardware Installation Manual

Site Requirement Guidelines
This equipment must be installed and maintained by service personnel as defined by AS/NZS 3260.
Warning
Incorrectly connecting this equipment to a general-purpose outlet could be hazardous. The
telecommunications lines must be disconnected 1) before unplugging the main power connector or 2)
while the housing is open, or both. Statement 1043
Warning Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF
or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables,
detach the end away from the unit first. Statement 1026

Console and Auxiliary Port Considerations

Cisco uBR7100 series routers include an asynchronous serial console port and an auxiliary port. The
console and auxiliary ports provide access to the access server either locally (with a console terminal)
or remotely (with a modem). This section discusses important cabling information to consider before
connecting a console terminal (such as PC running terminal emulation software) to the console port or
connecting a modem to the auxiliary port.
The main difference between the console and auxiliary ports is that the auxiliary port supports hardware
flow control using RTS/CTS (Request To Send/Clear To Send) signaling, and the console port does not.
Flow control paces the transmission of data between a sending device and a receiving device, ensuring
that the receiving device can absorb the data sent to it before the sending device sends more.
When the buffers on the receiving device are full, a message is sent to the sending device to suspend
transmission until the data in the buffers has been processed. Because the auxiliary port supports flow
control, it is ideally suited for use with the high-speed transmissions of a modem. Console terminals
transmit at slower speeds than modems; therefore, the console port is ideally suited for use with console
terminals.
For detailed information about installing a console terminal and connecting devices to the auxiliary port,
see the
pinouts, see

Console Port Connections

Cisco uBR7100 series routers include an EIA/TIA-232 asynchronous serial console port (RJ-45).
Depending on the cable and the adapter used, this port will appear as a data terminal equipment (DTE)
or data communications equipment (DCE) device at the end of the cable. Your router arrives with cables
and adapters to connect a console terminal (an ASCII terminal or PC running terminal emulation
software) to the console port.
To connect a PC running terminal emulation software to the console port, use the RJ-45 rollover cable
with the female RJ-45-to-DB-9 adapter (labeled TERMINAL). The default parameters for the console
port are 9600 baud, 8 data bits, no parity, and 2 stop bits. The console port does not support hardware
flow control.
Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
2-12
"Connecting the Console Port and Auxiliary Port" section on page
Appendix C, "Cable Specifications,"
Chapter 2 Preparing for Installation
3-10. For cable and port
OL-5916-01