3Com 3C410012A - OfficeConnect Remote 531 Access Router Getting Started Manual page 24

1-8 C 1: I
HAPTER NTRODUCTION
position. If connecting to a single PC, set the switch to the Out
position to implement the 10Base-T crossover.
WAN (531 only) The WAN interface is a 25-way D-type female
connector. It allows the unit to be connected to a leased line.
The WAN port supports any of the CCITT data transmission standards
(X.21/V.11, V.24/V.28, and V.35/V.36) at data transfer rates up to 2
Mbps. If connection cables following these standards are used, the
OfficeConnect Remote automatically detects the type of cable
attached and prompts for the appropriate information when the unit
is configured.
Suitable WAN interface cables are available from your 3Com reseller
(see Appendix A).
10BaseT (LAN) The 10Base-T interface is an RJ45 socket. It allows
direct connection between OfficeConnect Remote and a single piece
of equipment (as opposed to multi-point LAN connections using
10Base2 cabling systems). The 10Base-T LAN port simulates the
characteristics of a workstation port. This allows it to be directly
connected to a LAN or network hub port as required.
If the LAN port is connected directly to a single PC or workstation,
the crossover must be implemented by setting the MDI/MDIX switch
to the Out position.
ISDN The ISDN interface is an RJ45 socket. An ISDN cable connects this
port to the ISDN line wall socket.
VOICE (521 and 531) The Voice port allows a standard PSTN
telephone handset (or any other compatible analog equipment) to be
connected to the unit. The equipment to be attached must operate
in dual tone multiple frequency (DTMF) mode.
The port acts as an analog to digital convertor allowing a
conventional PSTN telephone to be used on an ISDN line. It supports
analog devices to a maximum ringer equivalence number (REN) of
two (UK). If one of the two 64 Kbps ISDN channels is available, a
voice call can be made.