Ericsson W2x Series - Manual (Page 14)

14 221 02-FGB 101 327 Uen C - December 2006
2.4 USB Interface
The W2x terminals include a USB 2.0 Host Controller with two (2) ports
(type A) supporting both full speed and high-speed. The USB interface
supports one low power device per port hence the maximum power
consumption of a device is 100 mA.
Maximum practical cable length for USB is 5 m.
2.5 Ethernet Interface
The W2x terminals include an Ethernet switch with four (4) external LAN
4x10/100BaseTx ports (female RJ45) for connection to PC equipment.
Each Ethernet port supports rate auto-negotiation and MDI/MDIX auto-
detection.
The MDI/MDIX auto detection allows the user to plug in either a straight or
crossed Ethernet cable regardless of how the other end is connected.
Maximum cable length for Ethernet is 100 m.
2.5.1 Built-in LED indicators
Each Ethernet connector has two built-in indicators. The left indicator
shows the speed of data traffic between the W2x terminals and the
connected client. If the speed is 100 Mbps, the indicator is green. When the
indicator is unlit, the speed is 10 Mbps.
The indicator to the right is green when a LAN connection is established
and flashes to show data traffic activity.
2.6 Telephony Interface (W25)
The Ericsson W25 includes dual POTS interface (FxS). The port marked
“Phone” is the primary port to be used for making phone calls. The other
port (marked “Phone/Fax”) is intended for fax machines and
complementary telephony services.
The ports are intended for on premises phones and should typically be
connected to devices within one building. Short loops (max 500Ω) is
supported.
The maximum ringing load for each port is 3 REN (corresponding to three
(3) old fashioned phones with mechanical bells or twenty (20) modern
phones with electronic ringing).
Characteristic impedance, gain, current etc of the ports are controlled by
software. DTMF dialing are supported. The ports have protection to prevent
the unit to be damaged by ESD (Electro Static Discharge).
2.7 Connectors
The bottom of the W2x terminals includes the connectors as described
below.
2.7.1 W20/W21 Connectors
The Ericsson W20/W21 is equipped with the following connectors located
at the bottom of the unit: