
Installing the External Courier 5-3
Step One: Connecting the Serial Cable
1 Look at the back of your computer for a port:
If you have Ports may be labeled this way
An IBM-compatible PC COM, RS-232, or with symbols such
as IOIOI, , or .
A Macintosh
(modem port) or (printer port)
Refer to your computer’s documentation to determine where the
serial port is.
NT-1
I-modem
ISDNTelephone
S/TBus
U
This is a typical Model S/T configuration, which requires an external NT-
1 unit to connect to the ISDN wall jack. The I-modem Model U
configuration is similar, but does not require an external NT-1. Instead,
the I-modem Model U has an internal NT-1 and connects directly to the
ISDN wall jack.
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