Asus M5A - Manual (Page 50)

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Using the Notebook PC
NOTE: The built-in modem and network cannot be installed later as an upgrade. Modem
and/or network can be installed as a PC card (PCMCIA).
Modem and Network Connections
The built-in modem and network model comes with both an RJ-11 and an RJ-45 port. RJ-11 telephone
cables have two or four wires and are used to connect telephones to telephone outlets found in the walls of
residential homes and some commercial buildings (some commercial buildings may have telephone wir-
ing designed for dedicated phone systems that may not be compatible). RJ-45 network cables are found
connecting network computers to network hubs or switches usually found in business environments.
IMPORTANT! Only use analog telephone outlets. The built-in modem does not support
the voltage used in digital phone systems. Do not connect the RJ-11 to digital phone
systems found in many commercial buildings or else damage will occur!