Ericsson Multi-Format Receiver RX1290 Manual do Utilizador Página 1

RX1290 Multi-Format ReceiverSoftware Version 3.0.0 (and later) REFERENCE GUIDE EN/LZT 790 0003/2 R1A

Introduction EN/LZT 790 0003/2 R1A 1-2 List of Figures Figure 1.1 Front View of a RX1290 Multi-Format Receiver...

Glossary DSNG Digital Satellite News-Gathering. DSP Digital Signal Processor. DTE Data circuit Terminating Equipment: A communications device that

Glossary Encryption Encoding of a transmission to prevent access without the appropriate decryption equipment and authorization. EPG Electronic Pr

Glossary GUI Graphical User Interface: The use of pictures rather than just words to represent the input and output of a program. A program with a

Glossary IP Internet Protocol: The IP part of TCP/IP. IP implements the network layer (layer 3) of the protocol, which contains a network address a

Glossary JPEG Joint Photographic Experts Group: ISO/ITU standard for compressing still images. It has a high compression capability. Using discre

Glossary MEM Multiplex Element Manager: A GUI-based control system, part of the range of Ericsson AB compression system control element products. T

Glossary Multicast An IP mechanism that allows transmission of data to multiple receivers. A multicast can also have several transmit sources simu

Glossary OFDM Orthogonal Frequency Division Multiplex: A modulation technique used for digital TV transmission in Europe, Japan and Australia; more

Glossary PES Packetized Elementary Stream: A sequential stream of data bytes that has been converted from original elementary streams of audio an

Glossary PRPB Analogue Color difference signals. Refer to CRCB for an explanation.PROM Programmable Read-Only Memory: A device, which may be writt

Introduction 1.1 Scope of This Reference Guide 1.1.1 Who Should Use This Reference Guide This Reference Guide is written for operators/users of th

Glossary ROM Read Only Memory: A non-volatile storage device for digital data. Data has been stored permanently in this device. No further inform

Glossary STB Set-Top Box: A box that sits on top of a television set and is the interface between the home television and the cable TV company. New

Glossary SNTP Simple Network Time Protocol is an Internet protocol used to synchronize the clocks of computers to some time reference. It is a sim

Glossary UART Universal Asynchronous Receiver Transmitter: A device providing a serial interface for transmitting and receiving data. UDP User Da

Glossary EN/LZT 790 0003/2 R1A A-20 Y (Luminance) Defines the brightness of a particular point on a TV line. The only signal required for bl

B Technical Specification Annex B Contents B.1 Output...

Technical Specification EN/LZT 790 0003/2 R1A B-2 B.5.4 SNMP Remote Control Connector ...

Technical Specification B.1 Output B.1.1 Supported Video Resolutions The Multi-Format Receiver supports H.264, 4:2:0 and 4:2:2. Table B.1 Suppor

Technical Specification Table B.3 625 Line Description Test Signal Limit Bar Level VITS17 700mV +/- 7mV Bar Tilt VITS17 <0.5% Sync Level V

Technical Specification Description Test Signal Limit K factor K 2T NTC-7 comp <1% Pulse X bar K rating 100 +/- 1% Frequency Response (Mu

Introduction Table 1.2 Hardware Options Marketing Code Price Object Number Supply Object Number Description RX1290/HWO/DVBS2 FAZ 101 0116/3 ROA

Technical Specification Parameter Value for Y, R, G, B Value for Pb, Pr Condition Notes Inter-channel delay < 10 nS < 10 nS 100% color ba

Technical Specification B.2 Audio Decoding and Output Stage B.2.1 General • The Multi-Format Receiver is capable of simultaneously decoding four

Technical Specification The Multi-Format Receiver is not able to decode and output all 5.1 channels individually as separate channels. It is possi

Technical Specification Table B.7 Analogue Audio Performance Specifications Parameter Specification Output connector Male 9 pin D-sub Output forma

Technical Specification • RIGHT TO BOTH (Channel 2 on left and right) When the input signal is STEREO, the Audio digital output format will always

Technical Specification Mono kbps Stereo kbps 112 224 128 256 160 320 192 384 B.3.7 Digital Audio Outputs Digital audio outputs comply with E1A-42

Technical Specification Parameter Specification range Receive spectrum sense Normal and inverted L-band Power Input power level per carrier -65

Technical Specification Parameter Specification Symbol rate step 1 Symbol/s Symbol rate lock range ± 100 ppm Maximum Channel bit-rate 90 Mbps Max

Technical Specification Table B.11 DVB-S2 Satellite Receiver Input – DVB-S Eb/No Ratio Convolutional FEC Rate Eb/No Ratio (dB) in IF Loop for corre

Technical Specification B.4.2 LNB Power and Control The Multi-Format Receiver provides LNB power and control signals through the active RF input co

Introduction Marketing Code Price Object Number Supply Object Number Description RX1290/SWO/LDELAY FAZ 101 0116/21 FAT 102 0223 LOW LATENCY DECOD

Technical Specification Input Specification De-Interleaver On/Off, Not available in 188-packet mode Status LED Green: Lock, Red: No Lock Output C

Technical Specification Input Specification Duplex mode Data Rate 1.5 – 208 Mbps TS CBR MPTS/SPTS feeds Error correction Pro MPEG FEC B.4.7 Fram

Technical Specification B.5.1.2 Digital Video Table B.20 Digital Video Output Connectors Item Specification Safety status SELV Connector type BN

Technical Specification Description Test Signal Limit Weighted Luminance Noise Luminance Ramp <60 dB Weighted Luminance Noise Flat Grey Field

Technical Specification B.5.2 Audio Outputs Table B.23 Digital (Unbalanced) Audio Connectors Item Specification Connector type BNC 75 Ω socket Con

Technical Specification B.5.3.2 High Speed Data over Ethernet This connector is located at the back of the unit using the RJ-45 Ethernet port and i

Technical Specification Item Specification Maximum Switching Power 24 W / 60 VA Minimum Switching Load 0.1 mA, 100 mV DC B.6 Environmental B.6

Technical Specification B.8.1 EMC9 The equipment has been designed and tested to meet the following: EN 55022 and CISPR22 European Internatio

Technical Specification COUNCIL of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility

Technical Specification The packaging is reusable per GB 18455-2001. This symbol guarantees that packaging with this symbol is recyclable and will

Introduction - Up to 40 preselected choices can be stored within the unit. • Multiple Inputs (Satellite Receivers): - L-band Satellite Receivers

Technical Specification It is assumed that while the product is in normal use, any batteries associated with real-time clocks or battery-backed RAM

Technical Specification • Company • Work Area (select one of the below) - Executive Management - Marketing and Sales - Planning/Engineering -

Technical Specification EN/LZT 790 0003/2 R1A B-28 BLANK

C Menus Annex C Contents C.1 LCD Menus... C-5 C.1.1 Using

Menus C.9.1 Overview ...C-20 C.9.2 Transport Stream Alar

Menus Table C.34 MER Alarm Setup Menu... C-23 Table C.35 C/N Alarm Setup Menu...

Menus EN/LZT 790 0003/2 R1A C-4 BLANK

Menus C.1 LCD Menus C.1.1 Using the Menus Detailed description of the use of menus is given in Chapter 3, Operating the Equipment Locally. C.1.2

Menus C.3 The Menu Structure Figure C.1 Menu Structure Switch ON Boot Screen 1 Preset Menu 2 Input Menu 3 Service Menu 4 Conditional Access Menu

Menus C.4 Presets Menu Items (Menu 1) The Presets menu contains up to 40 editable preset numbers in the range 01 – 40. Selecting a Service via the

Introduction - Front Panel User Interface. 1.2.2 Inputs 1.2.2.1 1.2.2.2 1.2.2.3 1.2.2.4 1.2.2.5 1.2.2.6 1.2.3.1 1.2.3.2 1.2.3.3 ASI Input (Decoder

Menus Table C.4 Input Selection Menu Display Title: Input Description Select XXXX XXXX is the editable input source selection (ASI, SMPTE 310, an

Menus Table C.6 TTV G.703 Menu Display Title: Input Description STATUS PDH Rate XXXXX XXXXX is the framing mode of the TTV G.703 input module (No

Menus C.5.6 100/1000BaseT Dual IP NIC Input Option Menu When a 100/1000BaseT input interface is used, the Input menu allows the user to edit the s

Menus Menus EN/LZT 790 0003/2 R1A C-11 EN/LZT 790 0003/2 R1A C-11

Menus C.6 Conditional Access Menu C.6.1 Overview The CA Menu allows the user to enter the various keys required for the different scrambling mode

Menus Director 5 Display Description NCP Lock Override PIN XXXX XXXX is PIN code RESET Lock Override PIN XXXXXXXXXXXXX XXXXXXXXXXXXX is PIN code

Menus After making a selection (in EDIT mode using page 1), and selecting the required component data streams (using the other pages), pressing SAV

Menus Table C.14 Video Menu Display Title: Video Description XX Stream PID ZZZZ YYYY XX is the number of video streams ZZZZ is the currently selec

Menus Display Title: Video Description Embedded Audio ID Group Group 1,2,3 or 4 525 Line Output NTSC-M, PAL-M, NTSC-MNP 625 Line Output PAL-B/G/

Menus Display Title: Audio 02 Description WWWWWWW is the audio language Sampling Rate XX.X kHz Bit-rate YYY kbit/s XX.X is the Audio 2 sample rate

Introduction • Four BNC connectors providing unbalanced audio output. Data Output 1.2.3.4 1.2.3.5 • RS-232 asynchronous low-speed data output car

Menus Table C.18 Audio 4 Menu Display Title: Audio 02 Description XX Streams PID YYYY WWWW WWWW W VVV ZZZZ XX

Menus Table C.20 High Speed Data Over Ethernet Menu Display Title: Ethernet Data Description User PID XXXX YYY PIPE ZZZZ XXXX is the currently sele

Menus Table C.23 Network ID Menu Display Title: Network ID Description Network ID XXXXX Original Network ID YYYYY XXXXX is the network ID from the

Menus Table C.26 Alarms Menu Display Title: Alarms Description Section Transport Stream Alarm Setup Transport Stream alarm and relay settings. C

Menus C.9.5 Audio 2 Alarm Setup Menu Table C.30 Audio 2 Alarm Setup Menu Display Title: Description IF AUDIO 02 NOT RUNNING YYYYYYYYYYYYYY YYYYY

Menus C.9.9 MER Alarm Setup Menu Table C.34 MER Alarm Setup Menu Display Title: Description IF MER LESS THAN XX.X YYYYYYYYYYYYYY YYYYYYYYYYYYYY

Menus Display Title: Setup Description XXXXXXXXXXXXX FRONT PANEL SERIAL REMOTE (not supported in software version 1.0.0) NETWORK (SNMP) LCD Contra

Menus Display Title: CR Details Description XX.XX.XX Firmware Versions XX.XX XX.XX is the firmware 1 version number XX.XX is the firmware 2 version

Menus EN/LZT 790 0003/2 R1A C-26 BLANK

D Language Abbreviations Annex D Contents D.1 ISO Language Abbreviations... D-3 D.2

Introduction 1.3.2 Input Connections The Satellite Receiver interfaces directly to Low-Noise Block (LNB) and accepts an intermediate frequency (IF

Language Abbreviations EN/LZT 790 0003/2 R1A D-2 BLANK

Language Abbreviations D.1 ISO Language Abbreviations Languages are shown in alphabetical order. Table D.1 ISO Language Abbreviation Table No Lang

Language Abbreviations EN/LZT 790 0003/2 R1A D-4 Table D.2 Non-ISO Language Abbreviation Table Language Abbreviation MAIN ONE AUX TWO INTERN

Factory Defaults E Factory Defaults Annex E Units are shipped with the following factory default parameters. These can be restored at any time us

Factory Defaults Menu Description Default ARP On SNMP Off FEC On if licensed UDP Upgrade port 61111 IP de-jitter Buffer Level 60ms Redundancy mo

Factory Defaults Menu Description Default ASYNC DATA ENABLED SYNC DATA (High Speed Ethernet Data Not Fitted) ENABLED ETH.NET DATA (High Speed Ethe

Factory Defaults EN/LZT 790 0003/2 R1A E-4 Menu Description Default SW VERSION/ FW VERSION/ HW VERSION/ PLD VERSION/ ELECTRONIC SERIAL NUMBE

Introduction 1.4 The Telco Receiver/Decoder 1.4.1 Typical Decoder System The Decoder is a component of Ericsson’s range of equipment. It is desig

Introduction Figure 1.5 Role of the Decoder 1.5 Control Modes 1.5.1 Introduction The Multi-Format Receiver is designed for unattended operation.

Preliminary Pages ENGLISH (UK) - READ THIS FIRST! If you do not understand the contents of this manual. DO NOT OPERATE THIS EQUIPMENT. Also, tra

Introduction 1.6 Guided Tour 1.6.1 Construction The Multi-Format Receiver is constructed using a screened self-ventilated modular system. All ope

Introduction 1.6.4 Rear Panel Inputs and outputs to the unit are taken via the rear panel. Connector descriptions are given in Chapter 2, Installin

Introduction EN/LZT 790 0003/2 R1A 1-14 BLANK

2 Installing the Equipment Chapter 2 Contents 2.1 Read This First! ...

Installing the Equipment EN/LZT 790 0003/2 R1A 2-2 2.7.9 Alarm Connector and Relay ...

Installing the Equipment 2.1 Read This First! 2.1.1 Handling The equipment must be handled and installed carefully and thoughtfully to prevent saf

Installing the Equipment Where appropriate, ensure this product has an adequate level of lightning protection. Alternatively, during a lightning st

Installing the Equipment 2.3.2 Ventilation 2.3.3 Openings in the Covers Side openings in the unit, as well as side-mounted cooling fans, are provi

Installing the Equipment 2.3.4 Installing Cables - Safety Power supply cables should be routed so that they are not likely to be walked on or pinc

Installing the Equipment Warning! The RX1290 should only be operated from the type of power source indicated on the marking label. If you are not su

Preliminary Pages EN/LZT 790 0003/2 R1A 2011-06-06 iii Contents Chapter 1: Introduction This chapter identifies the equipment versions covered

Installing the Equipment If the colors do not correspond with the colored markings identifying the terminals in a locally supplied plug, proceed as

Installing the Equipment Figure 2.3 Location of the Technical Earth 2.7 Signal Connections 2.7.1 General Caution! It is strongly recommende

Installing the Equipment Power Supply AC Power Supply Option Cards ASI FRAME SYNC REMOTE CONTROL ETHERNET ASI I

Installing the Equipment 2.7.2 ASI/HD-SDI/SD-SDI OUT The unit has three ASI/SMPTE 292M video (HD-SDI)/656 video (SD-SDI) outputs in the standard c

Installing the Equipment In addition, four unbalanced digital audio outputs are available via separate BNC connectors. Table 2.5 Analogue/Digital

Installing the Equipment Table 2.7 SVGA Connector Item Specification Connector type 15-way D-type Connector designation Video Out Pin-outs 1 Re

Installing the Equipment Table 2.8 Frame Sync Hi-Z Connector Item Specification Connector type BNC 75 Ω socket Connector designation FRAME SYNC Pi

Installing the Equipment 1 5 6 9 2.7.9 Alarm Connector and Relay The alarm relay connector has a summary relay. The summary relay is activated w

Installing the Equipment EN/LZT 790 0003/2 R1A 2-16 Item Specification Pin 5 - Ground (RS-232) Pin 6 - Reserved Pin 7 - No connection Pin

3 Operating the Equipment Locally Chapter 3 Contents 3.1 Powering the Equipment ...

Preliminary Pages Introduction This Reference Guide provides instructions and information for the installation and operation of the RX1290 Multi-Fo

Operating the Equipment Locally 3.7.12 Setting Up VITC ... 3-19 3.7.

Table 3.13 Setting Aspect Ratio ...3-16 Table 3.14 Setting Video Delay Mod

Operating the Equipment Locally EN/LZT 790 0003/2 R1A 3-4 BLANK

Operating the Equipment Locally 3.1 Powering the Equipment 3.1.1 Switching On Caution! This equipment should not be operated unless the cooling f

Operating the Equipment Locally 3.2 Front Panel Controls and Pushbuttons Front Panel items are described under Section 1.6, Guided Tour. Fig

Operating the Equipment Locally Pushbutton LEDs will be updated to indicate which pushbutton presses are still valid as each navigation pushbutton p

Operating the Equipment Locally 3.4.2 Selecting a Menu Option Some items shown in the right display area of the front panel LCD display have a set

Operating the Equipment Locally 3.5 Setting Up Preset Services (Menu 1) 3.5.1 Using Preset Services This group allows up to 40 Services to be stor

Operating the Equipment Locally 3.6 Setting Up the Input (Menu 2) 3.6.1 DVB-S2 Satellite Receiver (TT1290/HWO/DVBS2 and TT1290/HWO/DVBS2/IF/CONST

Operating the Equipment Locally 3.6.1.1 DVB-S2 Input Option Card TT1290/HWO/DVBS2/IF/CONST The DVB-S2 demod option TT1290/HWO/DVBS2/IF/CONST offers

Preliminary Pages Registered Trademarks Ethernet® Registered trademark of Xerox Corporation. Dolby®/AC-3® Registered trademarks of Dolby Laborato

Operating the Equipment Locally 3.6.3 10/100BaseT Input – RX1290/HWO/IP Table 3.8 steps through the set-up procedure of the Telco Receiver using

Operating the Equipment Locally 3.6.4 100/1000BaseT Dual IP Input – RX1290/HWO/GIGE Steps through the set-up procedure of the Receiver using Menu

Operating the Equipment Locally Step Action Result 12 Return to Input Menu 2, it should display the current status. If status is NOT LOCKED, veri

Operating the Equipment Locally Step Action Result 3 Scroll to Menu 3.1.7 and edit the video test pattern to be displayed. Press Save. Edits the

Operating the Equipment Locally Table 3.13 Setting Aspect Ratio Step Action Result 1 Scroll to Menu 3.1.9 and edit the parameter for aspect ratio

Operating the Equipment Locally Table 3.16 Setting Low delay mode Step Action Result 1 Go to Menu 3.1.15 and edit the option displayed. (LOW DELAY

Operating the Equipment Locally Step Action Result 3 Scroll to Menu 3.3.4 and edit the Audio 1 digital output format (AES3 or AC-3) and output ro

Operating the Equipment Locally Step Action Result 2 Scroll to Menu 3.8.1 and edit the High speed data output (ENABLED or DISABLED). Press Save. Th

Operating the Equipment Locally 3.7.13 Setting Up Closed Captions Table 3.22 Setting Up Closed Captions Step Action Result 1 Scroll to Menu 3.10

Operating the Equipment Locally 3.7.17 Setting Up Video Index Table 3.26 Setting Up Video Index Step Action Result 1 Scroll down to Menu 3.10.7 a

Preliminary Pages Caution! Cautions give information which, if strictly followed, will prevent damage to equipment or other goods. They are highlig

Operating the Equipment Locally 3.7.21 Setting Up VANC Data Insertion Table 3.30 Setting Up VANC Data Insertion Step Action Result 1 Scroll down

Operating the Equipment Locally 3.7.25 Setting Up DVB Subtitles Table 3.34 Setting Up DVB Subtitles Step Action Result 1 Scroll down to Menu 3.15

Operating the Equipment Locally 3.8.2 Basic Interoperable Scrambling System (BISS) (Menu 4.4) BISS Mode 1 is similar to RAS in that it uses a fixe

Operating the Equipment Locally 3.9 Setting Up the Transport Stream Output (Menu 5) 3.9.1 Set-Up Procedure Use Table 3.37 to step through the Tran

Operating the Equipment Locally 3.9.3 Transport Stream Output Bit-rates The Maximum input/output rates are described in Table 3.39. Table 3.39 Ma

Operating the Equipment Locally Step Action Result 6 Scroll to Menu 6.4 and edit the AUDIO 2 menu (NO ALARM, SET ALARM ONLY). Press Save.Edits the

Operating the Equipment Locally EN/LZT 790 0003/2 R1A 3-28 Step Action Result 6 Scroll to Menu 7.1.3.1 and edit the Subnet Mask. Press Save.

4 Operating the Equipment Remotely Chapter 4 Contents 4.1 Remote Control ...

Operating the Equipment Remotely EN/LZT 790 0003/2 R1A 4-2 BLANK

Operating the Equipment Remotely 4.1 Remote Control 4.1.1 Introduction The Multi-Format Receiver can be remotely controlled in a variety of ways.

Preliminary Pages Customer Services Europe, Middle East and Africa Tel: +44 (0) 23 8048 4455 Fax: +44 (0) 23 8048 4467 Email: tvsupportemea@erics

Operating the Equipment Remotely Table 4.2 Configuring the Serial Remote Port and Activating Remote Protocol Step Action Result 1. Go to menu 7.

Operating the Equipment Remotely However, if a situation occurs whereby the local user needs to regain control over the unit, without a local lockou

Operating the Equipment Remotely EN/LZT 790 0003/2 R1A 4-6 BLANK

5 Alarms Chapter 5 Contents 5.1 Introduction...5-3 5.2 Lo

Alarms EN/LZT 790 0003/2 R1A 5-2 BLANK

Alarms 5.1 Introduction There are two Front Panel LEDs that indicate the status of the Multi-Format Receiver. These are used to indicate abnormal p

Alarms EN/LZT 790 0003/2 R1A 5-4 • Audio 3 not running - This alarm is raised if the third audio is incorrect. • Audio 4 not running - This

6 Options Chapter 6 Contents 6.1 Hardware Enabled Options ...6-3 6.2 DVB-S2 Input

Options EN/LZT 790 0003/2 R1A 6-2 List of Figures Figure 6.1 The Protocol Stack...

Options 6.1 Hardware Enabled Options These options require extra hardware to be fitted to the unit. Contact the Customer Services Helpdesk for deta

Preliminary Pages EN/LZT 790 0003/2 R1A 2011-06-06 viii Return of Equipment If you need to return equipment for repair please contact your l

Options Table 6.1 DVB-S2 Satellite Receiver (L-band) Connector Input Specification Connector Type F-type, Female Connector designation IN 1, IN 2

Options 6.2.4 Connector Details – Constellation Output (RX1290/HWO/DVBS2/IF/CONST) Connect the I and Q constellation output connectors to a suitabl

Options Figure 6.1 The Protocol Stack The MPEG-2/DVB layer is specified in ISO/IEC IS 13818 – Generic Coding of Moving Pictures and Associated A

Options 6.5 100/1000BaseT Dual IP Input – RX1290/HWO/GIGE Dual IP NIC Input card provides a 100/1000BaseT Ethernet port, on which a transport strea

Options 6.5.1.2 Mode of Operation when input port is set to Port 1 or Port 2 When the user sets the input port to either port 1 or port 2, a link

Options 6.11 MPEG-2 HD 4:2:2 Decode (RX1290/SWO/MPEG-2/HD/422) This option enables MPEG-2 HD 4:2:2 decode functionality. 6.12 MPEG-4 SD Decode (RX

Options EN/LZT 790 0003/2 R1A 6-10 6.19 AAC Audio Support (RX1290/SWO/AAC) This option enables AAC audio decode support on the receiver. 6.2

7 Preventive Maintenance and Fault-finding Chapter 7 Contents 7.1 Introduction...

Preventive Maintenance and Fault-finding EN/LZT 790 0003/2 R1A 7-2 BLANK

Preventive Maintenance and Fault-finding 7.1 Introduction This chapter provides the schedules and instructions, where applicable, for routine inspe

1 Introduction Chapter 1 Contents 1.1 Scope of This Reference Guide ...1-3 1.1.1 Who Sho

Preventive Maintenance and Fault-finding 7.3 Servicing 7.3.1 Conditions Requiring Servicing Warning! Removing the covers of this equipment may in

Preventive Maintenance and Fault-finding 7.4 Maintenance and Support Services 7.4.1 Introduction Our primary objective is to provide first class c

Preventive Maintenance and Fault-finding 7.5 Fault-finding 7.5.1 General The information contained in this chapter is intended to isolate the uni

Preventive Maintenance and Fault-finding 7.6 AC User Accessible Fuse Replacement Caution! This product should be operated only from the type of pow

Preventive Maintenance and Fault-finding EN/LZT 790 0003/2 R1A 7-8 Caution! When replacing the power input fuse, always ensure that a fuse of

A Glossary Annex A The following list covers most of the abbreviations, acronyms and terms as used in Ericsson Manuals, User and Reference Guides

Glossary AMOL I and II Automatic Measure of Line-ups I and II: Used by automated equipment to measure programme-viewing ratings. ARP Address Res

Glossary Bouquet A collection of services (TV, radio, and data, or any combination of the three) grouped and sold together, and identified in the S

Glossary Chrominance The color part of a TV picture signal, relating to the hue and saturation but not to the luminance (brightness) of the signal

Glossary DCE Data Communications Equipment: Typically a modem. It establishes, maintains and terminates a session on a network but in itself is not