Connection; A) Lan Ethernet Connection; B) Wan Or External Modem Connection - Teldat Atlas 250 Installation Manual

2.2. Connection

a) LAN Ethernet connection

The LAN interface has two female RJ45 connectors in order to connect to the Ethernet 10BaseT /
100BaseT networks through shielded twisted pairs (STP) or unshielded (UTP) cables. These cables
are not supplied with the equipment; please consult your supplier with regard to this.
Depending on the design of the Network, the connection is carried out through a HUB or directly to
another terminal device Ethernet interface through a crossover cable (please consult your supp lier for
information on crossover Ethernet cables).

b) WAN or external modem connection

The DTE/DCE multistandard serial interfaces have a DB25 female connector in order to connect to an
external modem or for connection to X.25, Frame Relay networks, etc.
Depending on the type of connection established, a different type of cable will be needed. This cable
can be supplied by Teldat if you wish.
On the underside on the device, there is a flap providing access to the sockets in order to insert the
V.24 DTE/DCE, V.35 DTE/DCE, and X.21 DTE/DCE drivers. These drivers are not multi-
purpose. The configuration for the operation mode is carried out by inverting the position of the
driver (this appears labeled as "T" indicating that this acts as terminal, and "M" indic ating modem
functions). The operation mode is that indicated by the label closest to the connector.
La The default configuration for the drivers (on leaving the factory) is indicated on a
label located on the underside of the device, close to the drivers access flap.
In the below figure you can see a given drivers configuration. WAN 1 operates in DCE mode and
WAN 2 in DTE mode.
Figure 3. Situation of the drivers depending on operating mode
M
WAN 2
ATLAS 250 – Installation Manual
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T
WAN 1
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