3com 520 User Manual

 

 

T

 

E

 

C

 

H

 

N

 

I

 

C

 

A

 

L

 

 I

 

N

 

F

 

O

 

R

 

M

 

A

 

T

 

I

 

O

 

N

 

■

 

802.3 MAC layer bridge.

■

 

802.1D spanning tree algorithm.

■

 

Support for bridge triangulation and link load 

 

sharing.

 

■

 

LAN filtering rate: 10000 frames per second.

■

 

LAN forwarding rate: 4000 frames per second.

 

ISDN and WAN forwarding rates are dependent on 

 

the link speed.

 

 

This product ostensibly complies with the 

 

electro-magnetic compatibility (EMC) requirements 

 

of EN 55022 Class A and EN 50082 (susceptibility). 

 

However, to fully comply with Class B of EN55022 the 

 

following prerequisites should be observed:

■

 

The WAN port must be attached to a screened digital 

 

cable.

■

 

The ISDN cable must be used in conjunction with a 

 

three turn ferrite.

 

The product carries the 

 

 certification mark to 

 

indicate conformance with the following EU directives:

■

 

LVD (Low Voltage Directive (Safety) 73/23/EEC.

■

 

EMC (Electro Magnetic Compatibility) Directive 

 

89/336/EEC.

■

 

TTE (Telecommunication Terminal Equipment) 

 

Directive 91/263/EEC.

 

The product conforms to I-CTR3 (based on NET3 – 

 

ISDN interface).

Rc.bk : RCAPPB.FRM  Page 2  Thursday, July 10, 1997  9:53 AM