RAD Data comm 100 User Manual

M

ORDERING

TINYBRIDGE-100/#/$

Miniature remote Fast Ethernet bridge

TINYBRIDGE-100/4W/$

Miniature remote Fast Ethernet bridge with 4-wire
WAN interface

# Specify WAN interface:

V24 for V.24/RS-232
V35F for V.35 (female adapter cable supplied)
V35M for V.35 (male adapter cable supplied)
V36 for V.36 (adapter cable supplied)
530 for RS-530
X21F for X.21 (female adapter cable supplied)
X21M for X.21 (male adapter cable supplied)

$ Specify AC for 100–240 VAC switching power

supply with integral AC connector
(may be ordered separately as P/S-AC/5/1200)

Installation and Operation Manual

TinyBridge-100

iniature Remote Fast

Ethernet Bridge

www.rad.com

International Headquarters

24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel: [phone]
Fax: [phone]
Email: [e-mail]

Specifications are subject to change without prior notice.

© 1993–2005 RAD Data Communications Ltd.

U.S. Headquarters

900 Corporate Drive
Mahwah, NJ 07430
Tel: [phone]
Toll free: 1-800-444-7234
Fax: [phone]
Email: [e-mail]

386-100-02/05

FEATURES

• High performance miniature remote

bridge for Fast Ethernet extension

• Wire-speed WAN throughput:

19,700 pps at 10 Mbps

• 10/100BaseT interface

• Synchronous WAN interfaces: V.24,

V.35, V.36, RS-530, X.21, or 4-wire
modem

• Two priority queues according to

802.1p or IP ToS bits

• Fault propagation of WAN error

conditions to LAN port

• Automatic MDIX support

• Compatible with applicable parts of

IEEE 802.3

DESCRIPTION

TinyBridge-100 is a high performance,

•

remote, self-learning Ethernet/Fast Ethernet
bridge. Its small size and low cost make it
ideal for sensitive bridging applications, or
as a LAN extender over synchronous WAN.

LAN INTERFACE

• TinyBridge-100 is available with a

10/100BaseT interface. The interface
operates in full or half duplex Ethernet
topologies.

• TinyBridge-100 supports a packet length of

up to 1536 bytes.

• Automatic MDIX allows using straight or

crossed cables for the LAN connection.

• MAC addresses of the LAN to which the

unit is connected are automatically learnt.
Only those frames destined for the remote
LAN are forwarded. The LAN table stores
up to 2048 addresses and is updated
automatically.

• MAC address filtering can be disabled,

allowing all traffic to flow over the WAN link

• TinyBridge-100 has two queues for

handling priority, determined in the
following order:

 If the packet received is an Ethernet tag

frame, TinyBridge-100 marks the packet
according to the tag priority (0–7).
0–3: low priority queue
4–7: high priority queue

 Otherwise, TinyBridge-100 marks the

packet according to IP-ToS priority (0–7).
0–3: low priority queue
4–7: high priority queue

 Untagged and non-IP frames enter the

low priority queue.
Frames egress from the queues with a 1:2
ratio, two frames with high priority, one
frame with low priority.

• Flow control for full duplex and

backpressure for half duplex are supported.
The buffer holds up to 120 frames.

WAN INTERFACE

• A selection of synchronous WAN interfaces

is available:

 V.24/RS-232
 V.35
 V.36/RS-449
 X.21
 RS-530.

• A fault on the WAN can be propagated if

fault propagation is enabled; the
TinyBridge-100 shuts down the link and
forces a router to trace another route.

• TinyBridge-100 operates over synchronous

links at data rates of up to 10 Mbps. An
external clock can be supplied for
operation at other bit rates.

FLAG DATA CRC FLAG

1 60–1532 2 1

Figure 1. TinyBridge-100 Frame Structure

• TinyBridge-100 WAN interface operates in

DTE mode. This means it accepts receive
and transmit clocks. The timing diagram is
shown in Figure 2.

Rx Data

Rx Clock

t

SETUP tHOLD

5ns 5ns

Tx Data

Tx Clock

t

9ns

DELAY

Figure 2. Receive and Transmit Clock

Timing Diagrams

APPLICATIONS

Figure 3. Bridging and Extending Ethernet over Baseband Modems

Figure 4. Bridging Ethernet over Multiplexed E1/T1 Links