YML830 Rev1
www.netcomm.com.au
CD2004 Mega-i 56K V.90 Modem User Guide
Page 25
9 Pin (RS-232 ) Serial Cable
A 9 Pin (RS-232) Serial Cable may be used to connect to a serial console terminal or a PC running a terminal
emulation program, such as Hyper Terminal.
USB cable
A typical USB cord has an “A” connection (“upstream” to plug into the computer) and a “B” connection
(“downstream” to plug into the device).
By using different connectors on the upstream and downstream ends, cable connection is simplified. The “B”
connection will fit a into the “B” socket of any USB device. Similarly, any “A” connector can be plugged into
any “A” socket, such as on a computer.
If it is a new device, the operating system auto-detects it and asks for the driver disk. If the device has
already been installed, the computer activates it and starts talking to it. USB devices can be connected and
disconnected at any time.
Pin No
Name
Notes/Description No.
1
DCD
Data Carrier Detect
2
RD
Receive Data (a.k.a RxD, Rx)
3
TD
Transmit Data (a.k.a TxD, Tx)
4
DTR
Data Terminal Ready
5
SGND
Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indicator
Male
Connector
“A” Connection
“B” Connection
