IMS-LIU: Line Interface Unit


This product is only compatible with Meinberg's line of modular IMS LANTIME systems.
Visit the IMS Information Page to learn more.
Generation of reference clocks for synchronisation tasks The module LIU (Line Interface Unit) generates different reference clock pulses which are derived from the GNSS-locked master oscillator of a preconnected satellite receiver. The output signals are available with high accuracy and stability therefore.

Key Features

Warranty Period (Years): 3 RoHS-compliant
  • Synchronisation of telecom networks
  • Synchronisation of transmitters/base stations (GSM / CDMA / UMTS / DAB / DVB)
  • Clock and Framed telecom outputs
  • Reference frequency delivered by preconnected GPS- or GLN-receiver




Product Description

Available LIU Models
LIU Type Width Outputs BITS Outputs Clock M500 M1000 M3000 M4000
LIU-A4040 8TE 4 x BITS RJ45 4 x BITS balanced
(EF-4-0) RJ45 connector 120 Ohm 		4 x Clock RJ45 4 x Clock balanced
(EC-4-0) RJ45 connector 120 Ohm
LIU-A4004 8TE 4 x BITS RJ45 4 x BITS balanced
(EF-4-0) RJ45 connector 120 Ohm 		4 x Clock BNC 4 x Clock unbalanced
(EC-0-4) BNC connector 75 Ohm
LIU-A0404 8TE 4 x BITS BNC 4 x BITS unbalanced
(EF-0-4) BNC connector 75 Ohm 		4 x Clock BNC 4 x Clock unbalanced
(EC-0-4) BNC connector 75 Ohm
LIU-A0044 8TE 4 x Clock RJ45 4 x Clock balanced
(EC-4-0) RJ45 connector 120 Ohm 4 x Clock BNC 4 x Clock unbalanced
(EC-0-4) BNC connector 75 Ohm
LIU-A2222 8TE 2 x BITS RJ45 2 x BITS balanced
(EF-2-0) RJ45 connector 120 Ohm 2 x BITS BNC 2 x BITS unbalanced
(EF-0-2) BNC connector 75 Ohm 		2 x Clock RJ45 2 x Clock balanced
(EC-2-0) RJ45 connector 120 Ohm 2 x Clock BNC 2 x Clock unbalanced
(EC-0-2) BNC connector 75 Ohm
LIU-A4000 4TE 4 x BITS RJ45 4 x BITS balanced
(EF-4-0) RJ45 connector 120 Ohm
LIU-A0400 4TE 4 x BITS BNC 4 x BITS unbalanced
(EF-0-4) BNC connector 75 Ohm
LIU-A0040 4TE 4 x Clock RJ45 4 x Clock balanced
(EC-4-0) RJ45 connector 120 Ohm
LIU-A0004 4TE 4 x Clock BNC 4 x Clock unbalanced
(EC-0-4) BNC connector 75 Ohm
LIU-A2020 4TE 2 x BITS RJ45 2 x BITS balanced
(EF-2-0) RJ45 connector 120 Ohm 		2 x Clock RJ45 2 x Clock balanced
(EC-2-0) RJ45 connector 120 Ohm
LIU-A2002 4TE 2 x BITS RJ45 2 x BITS balanced
(EF-2-0) RJ45 connector 120 Ohm 		2 x Clock BNC 2 x Clock unbalanced
(EC-0-2) BNC connector 75 Ohm
LIU-A0202 4TE 2 x BITS BNC 2 x BITS unbalanced
(EF-0-2) BNC connector 75 Ohm 		2 x Clock BNC 2 x Clock unbalanced
(EC-0-2) BNC connector 75 Ohm
LIU-A1111 4TE 1 x BITS RJ45 1 x BITS balanced
(EF-1-0) RJ45 connector 120 Ohm 1 x BITS BNC 1 x BITS unbalanced
(EF-0-1) BNC connector 75 Ohm 		1 x Clock RJ45 1 x Clock balanced
(EC-1-0) RJ45 connector 120 Ohm 1 x Clock BNC 1 x Clock unbalanced
(EC-0-1) BNC connector 75 Ohm


Characteristics

Control Elements E1- or T1-generator, settable by web interface
Accuracy of Frequency Outputs The accuracy of the generated output signals depends on the master oscillator of the preconnected reference clock.
Interface Clock Outputs:
2048 kHz (E1-mode) or 1544 kHz (T1-mode), G.703, 75 Ohm, unbalanced
2048 kHz (E1-mode) or 1544 kHz (T1-mode), G.703, 120 Ohm, balanced

Framed Outputs:
2048 kBit/s (E1-mode) or 1544 kBit/s (T1-mode), 75 Ohm, unbalanced or
2048 kBit/s (E1-mode) or 1544 kBit/s (T1-mode), 120 Ohm, balanced

Output pulses according to G.703 (E1-mode) or T1.403 (T1-mode) (T1-Mode)
Line Coding HDB3 (E1-mode) or B8ZS (T1-mode)
Operating Voltage +5 V DC
Current Draw 5 V +-5%, 450 mA
Supported Temperature Operational: 0 - 50 °C (32 - 122 °F)
Storage: -20 - 70 °C (-4 - 158 °F)
Supported Humidity Max. 85 % (non-condensing) at 40 °C
Warranty Three-year warranty
RoHS Status of Product This product is fully RoHS-compliant.
WEEE Status of Product This product is handled as a B2B (Business to Business) category product. To ensure that the product is disposed of in a WEEE-compliant fashion, it can be returned to the manufacturer. Any transportation expenses for returning this product (at end-of-life) must be covered by the end user, while Meinberg will bear the costs for the waste disposal itself.


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