ISDN - E1 Drop&Insert Multiplexer

                    

 

 

 

 

 

 

 

ELIS-8 - Smart ISDN Multiplexer
Provides ISDN BRA service to any customer

ELIS-8 multiplexer is designed to reduce ISDN BRA introduction & exploitation costs, while providing the service at any location.

 

 

ELIS-4 - Single board ISDN multiplexer

ELIS-4 is used to dislocate (extend) 4 basic ISDN connection over 2Mb transmission system

 

 ELIS-8 - Smart ISDN Multiplexer

Provides ISDN BRA service to any customer

Reduces ISDN BRA introduction & exploitation costs, while providing the service at any location.

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dynamic Allocations of B Channels
To dislocate one ISDN BRA over E1 link it is necessary to accommodate 2B & D channels and M bits.
For all ISDN BRA D channels and M bits, ELIS-8 permanently allocates only one time-slot of the E1 link. The total B-content of all ISDN connections allocates a group of time-slots, called B-window. The size of a B-window is adjusted in increments of one time-slot. B-channels are allocated dynamically to time-slots within a B-window, thus releasing the scarce transmission resources.
For example, for optimal performance 8 IDSN BRA connections allocate 9 time-slots.
Twisted-Pair Quality Measurements
To measure electrical characteristics of the attached twisted-pairs, ELIS-8 features a measurement port for use by external test equipment. Any twisted-pair at RSS end (subscriber lines) can be remotely switched to measurement equipment. One POTS line & RSS line measurement function can be used as low cost alternative of measurement equipment. NT terminal equipment measurements and data transmission quality measurements are controlled from the central office and performed the same way as with direct ISDN connections.

 

 

 

 

 

 

 

 

 

 

 

 

 

Light-Signaling Indicators
There are several light-indicators on the board front panel.
Each ISDN BRA has a green light indicator signaling the U interface status (NT line detection, LT short circuit, ISDN activation).
The two red light indicators provide transmission & acception E1 link alarms.
Yellow light indicators signal the device status.
Parameter Adjustments
Micro-switches are provided to adjust the basic ELIS-8 parameters ( NT/LT mode, initial D+M channel selection, number of B channels, 16TS skiping, ...). The number of B channels used are adjusted at only one of the two ELIS-8 boards involved per E1 link, the one fitted at the central office.

An RS232 communication port for a PC enables software updates and additional parameter adjustments ( E1 link attenuation, jitter level, U interface characteristics...).

Protection
Twisted-pairs are frequently subjected to atmospheric surges. For that purpose, the power supply and each ISDN BRA port are fitted with a course and a fine overvoltage protection.

Added telecom fuses protect line input from power line cross-conection.

Main Characteristics
- 8 ISDN BRA dislocation
- Drop&Insert technique
- NT/LT mode
- Dynamic allocation od B channels
- Light signaling indicators
- Measurement equipment part
- Manual or PC setings
- Source 90V (LT mode)
- Line detection (NT mode)
- Overvoltage/overcurrent protection
 
Connectors:

- 8 ISDN BRA
- 2 E1 2Mb
- 1 Measurement part
- 1 RS-232 (PC)
- 1 Power 48 VDC


Light indication:

- 1 Power
- 1 Device state
- 8 ISDN BRA
- 2 E1 Alarm


Recommendation:


- ETS ETR 080
- ETS ETS 300 233
- ETS ETS 300 011
- ETS ETS 300 386
- ITU-T G.703
- ITU-T G.704
- ITU-T G.706
- ITU-T G.732
- ITU-T G.823
- ITU-T K.20/K.21

 

 

 

 

 

 

Drop & Insert
ELIS-8 multiplexes 8 ISDN BRA to an E1 line using Drop&Insert technique. Unallocated channels are passed-through, which enables fitting ELIS-8 multiplexer boards to any existing E1 link. Channels used by ELIS-8 must be exclude from LE-RSS communication.
Simple Installation
ELIS-8 is a single-board multiplexer of Ericsson-standard dimensions. Due to its standard all-front-end connectors, it fits to any free slot of LE or RSS rack.

 

 

Dislocating 8 ISDN BRA

 

Provide ISDN BRA service to any customer
ELIS-8 multiplexer is designed to reduce ISDN BRA introduction & exploitation costs, while providing the service at any location.

Installing one multiplexer board at central office, and another one at a remote site (without ISDN sevice), dislocation of 8 ISDN BRA is enabled over an E1 link.

ELIS-8 can be feeted on existing E1 link with minimum number of allocated channels for reduction of implementation cost (Drop&Insert mode).

The board is constructed to fit to any free (Ericsson-type) slot at the central office and the remote object.

It requires standard telecommunication power supply voltage of -48V.

 

          

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 ELIS-4 - Single board ISDN multiplexer

ELIS-4 is used to dislocate (extend) 4 basic ISDN connection over 2Mb transmission system

 

 

 

 

 

 

General description

ELIS-4 is used to dislocate (extend) Basic ISDN connection over 2Mb transmission system, enabling ISDN service at locations without adequate technical support (for ex. Remote Subscriber Switch).

This device accepts up to four Basic ISDN connections, embedding them into one 2Mb link. Thus several devices can exploit the unused resources of the same transmission link (drop&insert mode).

This programmable device can be used in various configurations, for example one module in NT mode accepts several modules in LT mode at different locations. Basic parameters (channel selection, NT/LT mode selection, drop&insert mode, system configuration) are determined by microswitches.

Detailed (small) adjustments (amplification/suppression (attenuation) of 2Mb line, line code,...), as well as the local control of the module, are done by PC over RS232 or RS485 interface

ELIS-4 is a single circuit-board module manufactured according to E2 standard, built for insertion into telephone exchange equipment slots. On locations where insertion is not possible, the module is enclosed in its own (container) case.

The power supply (-48V) and all other external connections are fully compatible with telecommunication standards.

 

 

 

 

 

 

 

 

 

 

 

 

 

Technical specifications

- 4x ISDN BRA-U connection (4 twisted pares)

- ISDN BRA-U interface to local ISDN Central office

- ISDN BRA-U interface to user side

- Work in Drop&Insert mode on E1

- Control and Supervision (local and remote)

- RS 232 & RS 485 connection for supervision and presets parameters

- Two line microswitches and five rotary microswitches for setting basic parameters

- Uses PC for sets complete parameters

- Supply voltage: -36VDC .. -72VDC

- Overvoltage protection of supply votlage

- Light indications for every ISDN connection

- Light indications for outgoing and incoming 2Mb link

- Light indications of validity of this device and for supply voltage

- Internal supply of ISDN line: -90 DC

- Controlled supply for ISDN line ( Imax=50mA )

- Overvoltage protection of ISDN line

- Short-circuit protection for ISDN line

- All in one module

 

Download documentation

ELIS - 4 [PDF english version] (file size: 3,1 Mb) - AdobeAcrobat document
ELIS - 4 [DOC english version] (file size: 3,2 Mb) - Word document
ELIS - 4 [PPT croatian version] (file size: ~520 kb) - PowerPoint presentation
ELIS - 4 short manual [PDF version][ENG - CRO] (file size: ~330 kb)
ELIS - 4 short manual [DOC version][ENG - CRO] (file size: ~400 kb)

Price

Contact us. [ elmar@elmar-el.hr ]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
       
           
 
Address. Hrvatske Mornarice 1F 21000 Split Croatia | Phone. +385 21 32 36 70 | Fax. +385 21 32 36 72