Ericsson W25 Bedienungsanleitung PDF herunterladen (Seite 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:

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Ericsson W25 Bedienungsanleitung Seite 14