muLOGIC LLM-336D.ETH User manual

User Guide
Issue 2.2
May 2023
Copyright 2009-2023
MuLogic B.V.
Plesmanstraat 62
3905 KZ Veenendaal, The Netherlands
LLM-336D.ETH
LEASED LINE MODEM FOR
ETHERNET BRIDGING
(HARDWARE REV.2.2/2.3 )

B
LLM–336/Eth Leased Line Modem for Ethernet Bridging
Compliances
Public Leased line operation
•2-wire operation (A2O, A2S): ES 203 021
•4-wire operation (A4O, A4S): ES 203 021
CE Compliance
•EMC: Directive 2004/108/EC (EN 55022, EN55024)
•Safety: Directive 2006/95/EC (EN 60950)
The LLM-336 complies with EMC directive 2004/108/EC and is classified for
use in Residential areas. Test standard: EN 55022 Class B.
The LLM-336 also complies with the Immunity standard for ITE equipment
EN 55024 with the applicable test levels increased to levels compatible with
Industrial standards (ref. EN 61000-6-2).
Important note:
This user guide applies to LLM-336D.Eth modems with hardware revisions 2.2
and 2.3.
Modems with hardware revision 2.2 or 2.3 are marked “H/W: rev2.2” or “rev2.3”
on the serial number label.
About this user guide
Although this user guide was written with greatest possible care, omissions and
errors cannot be precluded. MuLogic b.v. accepts no liability for any
inaccuracies that may be found.
However if you have comments or suggestions about this guide, please contact
us in order to help us to improve our product documentation.
MuLogic BV
Tel: [phone]
E-mail: [e-mail]
Website: www.mulogic.com
© MuLogic b.v. 2009-2023
This guide is for information purposes only. All design characteristics,
specifications, etc. are subject to change without notice.
No part of this publication may be reproduced, transmitted, transcribed, stored
in a retrieval system or translated into any human or computer language in any
form by any means without the prior permission of MuLogic b.v.
Issue No 2.2 (May 2023)

Leased Line Ethernet Data Modem LLM-336 User Guide - Introduction
Page 1-1
1
Introduction
LLM-336D.Eth
The MuLogic LLM-336D.Eth is a voiceband modem for connecting Ethernet
products over copper wire or analogue leased lines. The modem offers a
transparent link for Ethernet packets regardless of the higher-level protocol.
The LLM-336D.Eth was designed for industrial applications: it can be powered
from low voltage AC or DC power sources and operates within a temperature
range of -25..+60°C.
The LLM-336D.Eth has a compact housing that can be used for panel or
DIN- rail mounting. A DIN-rail clamp is included.

User Guide - Introduction Leased Line Data Modem LLM-336
Page 1-2
Features
•No configuration, very easy set-up, almost "plug and play".
•Automatic learning Ethernet bridge.
•Protocol independent.
•No routing configuration required.
•10/100baseT Auto-MDI/MDIX Ethernet interface.
•V.34 modem for line rates between 9600 bit/s and 33.6 kbit/s.
•Operates over analogue leased lines (2 wire and 4 wire)
•Operates over "dry" copper wire and conditioned copper lines.
•Isolated supply voltage (ac and dc) for industrial environments.
•9-36 Vdc or 18-60Vdc/22-30Vac supply voltage.
•Extended temperature range from –25°C to +60°C.
Getting started quickly?
If you are more or less familiar with the product, you can immediately skip to
chapter 3 that describes the set-up of the LLM-336D.Eth.
For hardware information you can refer to chapter 2.

Leased Line Ethernet Data Modem LLM-336 User Guide – Hardware Details and Installation
Page 2-1
2
Hardware Details and Installation
The LED indicators of the LLM-336 display the real-time status of the modem
and the key interface signals. In case a communication problem occurs, these
LEDs can help you determine the cause of the problem.
LED
Description
PWR
Indicates that the modem is powered on and
functions correctly.
DTR
Follows the state of the LNK LED at the back
panel. This LED is on when the Ethernet port is
connected correctly to the HUB, switch or PC.
TxD*
Flashes when the modem sends Ethernet frames
towards the remote modem.
RxD*
Flashes when the modem receives Ethernet
frames from the remote modem.
DCD
Indicates that a valid connection is made with the
remote modem.
Modem LED
Indicators

User Guide – Hardware Details and Installation Leased Line Ethernet Data Modem LLM-336
Page 2-2
LED
Description
COL
Collision detected on connected LAN.
FDX
Ethernet port in Full-duplex mode.
100Mbps
Ethernet port operates at 100Mbps.
Rx/Tx
Flashes when data is transmitted via the Ethernet
port.
LNK
Ethernet connected (HUB, Switch or PC).
Configuration Switches
DS1
ON
OFF
1 .. 4 See table 2, maximum modem line rates
5 Reserved (keep On)Reserved (keep On)
6 Reserved (keep Off) Reserved (keep Off)
7 Reserved (keep Off)Reserved (keep Off)
8 Reserved (keep Off)Reserved (keep Off)
Table 1. Dipswitch 1
Note: unless stated otherwise, DS1.5 must remain in the ON position.
In this mode, the LLM-336D.Eth Rev2.2 is compatible with older LLM-336D.Eth
modems in non-compressed mode.
Ethernet LED
Indicators
DS1, Dip-switch 1

Leased Line Ethernet Data Modem LLM-336 User Guide – Hardware Details and Installation
Page 2-3
Maximum Line Data Rates
DS1.1 DS1.2 DS1.3 DS1.4
0
33.6 kbit/s – V.34 mode
Off
Off
Off
Off
1
31.2 kbit/s – V.34 mode
On
Off
Off
Off
2
28.8 kbit/s – V.34 mode
Off
On
Off
Off
3
26.4 kbit/s – V.34 mode
On
On
Off
Off
4
24.0 kbit/s – V.34 mode
Off
Off
On
Off
5
21.6 kbit/s – V.34 mode
On
Off
On
Off
6
19.2 kbit/s – V.34 mode
Off
On
On
Off
7
16.8 kbit/s – V.34 mode
On
On
On
Off
8
14.4 kbit/s – V.34 mode
Off
Off
Off
On
9
12.0 kbit/s – V.34 mode
On
Off
Off
On
10
9.6 kbit/s – V.34 mode
Off
On
Off
On
11
7.2 kbit/s – V.34 mode
On
On
Off
On
12
4.8 kbit/s – V.34 mode
Off
Off
On
On
13
14.4 kbit/s – V.32bis mode
On
Off
On
On
14
12.0 kbit/s – V.32bis mode
Off
On
On
On
15
9.6 kbit/s – V.32bis mode
On
On
On
On
Table 2. Maximum modem line rates
DS2
ON
OFF
1
4-wire operation
2-wire operation
2
2-wire operation
4-wire operation
3
4-wire Rx line terminated with 600 Ω
2-wire operation
4
4-wire operation
2-wire operation
5
Reserved (keep Off)
Reserved (keep Off)
6
Reserved (keep Off)
Reserved (keep Off)
7
Originate mode
Answer mode (note 1)
8
Monitor speaker on
Monitor speaker off
Line type
DS2.1
DS2.2
DS2.3
DS2.4
DS2.5
DS2.6
2-wire line
Off
On
Off
Off
Off
Off
4-wire line
On
Off
On
On
Off
Off
Table 3. Line connection modes
Note 1.
One modem must work in originate mode and the other in answer mode.
DS2, Dip-switch 2

User Guide – Hardware Details and Installation Leased Line Ethernet Data Modem LLM-336
Page 2-4
1 = Not connected
2 = 4-wire transmit signal a (output)
3 = 4-wire receive signal a (input) / 2-wire receive-transmit a
4 = 4-wire receive signal b (input) / 2-wire receive-transmit b
5 = 4-wire transmit signal b (output)
6 = Not connected
1 = Tx+
2 = Tx-
3 = Rx+
4 = Not connected
5 = Not connected
6 = Rx-
7 = Not connected
8 = Not connected
Note: The Ethernet port is of type 10/100baseT Auto-MDI/MDI.
It will automatically adapt to the connected Ethernet port.
The operating power of the LLM-336D.Eth is supplied at the two PWR pins
screw terminal connector (The two “CI” pins are not used). The operating
voltage range depends on the model:
LLM-336D.Eth/VR1: 9-36Vdc, 19-26Vac
LLM-336D.Eth/VR2: 18-60Vdc, 22-30Vac
Note: The power input of the LLM-336 is not polarised. You can connect DC
power in either direction.
Line Connector
Ethernet Connector
Power connectors

Leased Line Ethernet Data Modem LLM-336 User Guide – Technical Specifications
Page 4-1
3
Operation
Quick set up
The LLM-336D.Eth is shipped from the factory in the following mode:
•All line rates from 4800 up to 33k6 bit/s enabled
•No data compression
If shipped as pair, the modems are configured for 2-wire operation where one
modem is set to Originate mode and the other to Answer mode. This means
that both modems can be connected back-to-back by means of the supplied
RJ-11 cable.
For changing from 2-wire to 4 wire operation put DS2.2 to OFF and DS2.1,
DS2.3 and DS2.4 to ON. (Refer to Table 3. Line connection modes)
To connect two modems together, one modem must operate in Originate mode
and the other in Answer mode. (Refer to Table 3. Line connection modes)
Under normal conditions, the modem automatically evaluates the line quality
and adapts the maximum data to achieve the best possible throughput.
However, on some very long unconditioned copper lines, the rate selected may
not be optimal. (In this case usually a too high rate is selected). In order to force
the modem to work at a defined maximum data rate, change the position of
DS1.1..DS1.4.
(Refer to Table 2, Maximum modem line rates)
Note: The maximum rate needs only to be selected at one modem of the pair.
The other modem will automatically follow the maximum data rate.
Changing 2-wire to
4-wire operation
Selecting Originate
or Answer mode
Changing
Maximum Data
Rate

User Guide – Technical Specifications Leased Line Ethernet Data Modem LLM-336
Page 4-2
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Leased Line Ethernet Data Modem LLM-336 User Guide – Technical Specifications
Page 4-3
4
Technical Specifications
Modem
•Modulation type: ITU-T V.34
•Max. modem data rate: 33.6 kbit/s.
•Conditioned or unconditioned analogue leased lines
•Dry copper wire cables
•2 wire and 4 wire operation
•Line impedance: 600 Ohms
•RJ-11 connector
Ethernet Interface
•Type: Remote Bridge
•10/100baseT Auto-MDI/MDIX port
•Frame size: max. 1536 bytes
•Frame buffer capacity: 256 frames
•Address filter: automatic learning and ageing
•Ageing time: 300 seconds
•Connection type: 10baseT or 100baseT UTP
Data Throughput
•Throughput at 33,6 kbit/s modem rate: 3,9 kbyte/s
•Latency (throughput delay) at 33,6 kbit/s modem rate: 45-70 ms
Modulation mode
and data rates
Line connection

User Guide – Technical Specifications Leased Line Ethernet Data Modem LLM-336
Page 4-4
Power supply
LLM-336D.Eth/VR1
•9-36 Vdc or 22-26 Vac
•Power consumption: 4,5 W max.
LLM-336D.Eth/VR2
•18-60 Vdc or 22-30 Vac
•Power consumption: 4,1 W max.
General
Dimensions and weight
•95x145x30 mm LxWxH, Weight: 220 gr.
Temperature range
•-25 ..+60°C, Humidity: 5..95%

Leased Line Ethernet Data Modem LLM-336 User Guide – Din Rail Mounting Bracket
Page 5-1
5
Din Rail Mounting Bracket
The LLM-33D.Eth is supplied with a mounting bracket for symmetrical rails of 35
mm according to DIN 46277-3, BS5584:1978 or EN 50-022.
The bracket is mounted to the bottom of the housing by means of an adhesive
strip and two screws.
Mounting instructions of DIN-rail clamp.
Remove the yellow cover of the adhesive strip and mount the bracket. The
bracket should be aligned with the two mounting holes in the bottom of the
housing. Then place the screws.
LLM-336D.Eth with DIN rail mounting bracket

User Guide – Din Rail Mounting Bracket Leased Line Ethernet Data Modem LLM-336
Page 5-2
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