MEGABIT MODEM 310F AND 320F USER MANUAL Catalog Number MMD4067I2 Issue 2
Copyright June 11, 2002 ©2002 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed in whole or in part without written consent of ADC. Trademark Information ADC is a registered trademark of ADC Telecommunications, Inc. Megabit Modem is a registered trademark of DSL Systems, Inc.
About This Manual ABOUT THIS MANUAL This manual is intended to help a network administrator install and configure the ADC® Megabit Modem 310F and 320F for use in a private network environment.
Product Certifications However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver.
Table of Contents TABLE OF CONTENTS Chapter 1: Megabit Modem 310F and 320F Features and Applications ...........................1 Features................................................................................................................................1 Applications.........................................................................................................................2 Chapter 2: Installing the Megabit Modem 310F and 320F..................................................
Table of Contents Configuring ADSL Service ...............................................................................................20 Configuring the Startup Settings .........................................................................21 Configuring Data Rates .......................................................................................22 Configuring the SNR Margin Threshold.............................................................23 Configuring the ES Threshold....................
Table of Contents Rate Adaptive Transmission.............................................................................................. 47 Rate Adaptation...................................................................................................48 Reach, Data Rate, SNR Margin, and Noise Environment ..................................48 Technical Specifications.................................................................................................... 51 Compliance.........................
Table of Contents viii Megabit Modem 310F and 320F User Manual
MEGABIT MODEM 310F AND 320F FEATURES AND APPLICATIONS 1 The ADC® Megabit Modem® 310F and 320F use Asymmetric Digital Subscriber Line (ADSL) technology to provide a multi-megabit connection between the two modems using a single-pair telephone line. The Megabit Modem 310F and 320F are designed to be used together, one at each end of a circuit, with the model 310F functioning as the ATU-C and the model 320F functioning as the ATU-R. The Megabit Modem 310F and 320F use Discrete MultiTone (DMT) line coding.
Applications APPLICATIONS Use the Megabit Modem 310F and 320F for: • remote access to private networks, for example telecommuting • point-to-point LAN extension, for example connecting multiple users at a satellite office to a corporate office LAN Telecommuting Application Corporate office Service Provider Home office Local User 320F Modem 310F Router 310F ADSL 320F Modem Ethernet LAN ADSL LAN Extension Application Corporate office Satellite office Ethernet LAN 310F Modem 320F Modem ADSL 2
INSTALLING THE MEGABIT MODEM 310F AND 320F 2 Install a Megabit Modem 310F (ATU-C) at one end of a circuit and a Megabit Modem 320F at the other end (ATU-R), using the procedures described in these sections: UNPACKING AND INSPECTING THE SHIPMENT The shipping carton contains the Megabit Modem 310F or 320F, this manual and the items described on page 4. Upon receipt of the equipment: 1 2 Unpack each container and visually inspect it for signs of damage.
Attaching the Feet The shipping carton also contains the items described in the following table. Item Function Black cable Connects the modem Ethernet port to a PC NIC using a straight-through cable. Yellow cable Connects the modem Ethernet port to a network hub using a crossover cable. Gray ADSL cable Connects the modem ADSL port to an RJ-11 wall jack that has DMT ADSL service.
Chapter 2: Installing the Megabit Modem 310F and 320F IDENTIFYING THE CONNECTORS All external connectors are located on the Megabit Modem 310F and 320F rear panel. This section describes the Megabit Modem 310F and 320F rear panel components. Component Function 10BASE-T MDI-X port RJ-45 port used to connect the modem to the 10BASE-T port of a network hub or PC NIC. RS-232 port RJ-45 port used to connect an ASCII terminal, or PC running a terminal emulation program, for configuration and management.
Installing the Cabling INSTALLING THE CABLING Use the provided cables as follows: • black cable or yellow cable—connect to 10BASE-T port for Ethernet LAN connection • gray ADSL cable—connect to DSL port for ADSL connection • power supply—connect to power connector Megabit Modem 310F or 320F PC, hub or other network device 10BASE-T port RS-232 port DSL port 10 BA SE Power connector -T RS -2 3 2 DS L PO WE R Wall RJ-11 jack with ADSL transmission To wall outlet Do not connect any other powe
Chapter 2: Installing the Megabit Modem 310F and 320F IDENTIFYING LEDS The front panels for both the Megabit Modem 310F and 320F contain LEDs that indicate power and data transmission status. The following illustrations describe the front panel LEDs.
Powering Up and Checking LEDs Powering Up and Checking LEDs Once you have completed the steps described in the previous sections for both the Megabit Modem 310F and 320F, you are ready to power up each modem. 1 Plug the Megabit Modem 310F power supply into the facility power and ensure the Power LED is lit solid green. 2 Plug the Megabit Modem 320F power supply into the facility power and ensure the Power LED is lit solid green. 3 Allow the modems approximately 30 to 60 seconds to synchronize.
PREPARING FOR CONFIGURATION AND MANAGEMENT 3 You configure the Megabit Modem 310F and 320F using an ASCII terminal or PC running a terminal emulation program. This chapter provides the set up procedures. CONNECTING A TERMINAL Connect the modem to an ASCII terminal or PC running a terminal emulation program: 1 Plug the console adapter into the standard 9-pin COM port on the terminal or PC and tighten the captive screws until they are snug.
Configuring the Terminal CONFIGURING THE TERMINAL Whether you are using an ASCII terminal or PC running a terminal emulation program, such as Hyperterminal, you must configure the communication settings as indicated in this section, including designating the connection type and communications port. See your terminal emulation program or operating system documentation for instructions.
Chapter 3: Preparing for Configuration and Management 2 If you have customized your password, type the password at the password prompt. Otherwise, press ENTER which is the factory default password. (See “Changing the Logon Password” on page 17 to customize your password.) 07/20/99 PAIRGAIN TECHNOLOGIES 00:47:59 ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 LOGON PASSWORD> The Main Menu displays. 07/20/99 PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 03:25:24 MAIN MENU 1. 2. 3. 4.
Logging On and Navigating the Interface Logging On to the Remote Modem From the Megabit Modem 310F (ATU-C), you can log on to the Megabit Modem 320F (ATU-R) to view system parameters and set configuration options in one of the following ways: • From the Main Menu on the ATU-C, type • Type CTRL ATU-C displays in the header when logged on to the Megabit Modem 310F T 4 and the ATU-R Logon screen displays. to toggle from any ATU-C screen and the ATU-R Logon screen displays.
Chapter 3: Preparing for Configuration and Management Navigating the Interface The following illustration shows the Megabit Modem 310F and 320F management interface structure. Select a menu option by typing the number that precedes it.
Logging Off The following table shows the keyboard functions used to navigate the management interface and to select menu options. Key Function ESC Restores the selected parameter to the last saved setting. This applies only to parameters for which you type a value but not to parameters for which you toggle to select a value. M Opens the Main Menu. Q Logs you off the management interface from the Main Menu. R Returns to the previous menu. CTRL R Refreshes the data on the current screen.
CONFIGURING THE MODEMS 4 Configure the Megabit Modem 310F and 320F using an ASCII terminal or PC running a terminal emulation program connected to the RS-232 port. SETTING SYSTEM CONFIGURATIONS From the System Configuration menu, you can set the system time and date, change the password, and reset the modems to factory default values. 1 From the Main Menu (page 11), type 07/20/99 1 to display the System Menu. PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 03:25:24 SYSTEM MENU 1.
Setting System Configurations 2 Type 2 to display the System Configuration menu. 07/20/99 PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 03:25:24 SYSTEM CONFIGURATION 1. 2. 3. 4. 5. CHANGE SYSTEM TIME CHANGE SYSTEM DATE CHANGE PASSWORD FACTORY DEFAULT CONFIGURATION ATU-R LOGIN ENABLED (R)eturn (M)ain ENTER CHOICE--> Changing the System Time 1 From the System Configuration menu, type 1 to select Change System Time.
Chapter 4: Configuring the Modems Changing the Logon Password 1 From the System Configuration menu (page 16), type 3 to select Change Password. The following message displays: Creating user password, press ENTER 2 Press ENTER . The following prompt displays: Please enter the new password 3 At the system prompt, type the new password, using up to eight characters, then press ENTER . (An * displays as you type each character.
Setting System Configurations Restoring Factory Default Settings The following table summarizes the factory default settings. The procedure restores all settings to their factory defaults.
Chapter 4: Configuring the Modems 3 If you typed Y to restore factory default settings, you must press the times to display the Logon screen. Then, log on to the modem(s). SPACEBAR several Disabling or Enabling the RS-232 Port For the Megabit Modem 320F You can enable or disable the RS-232 port for the Megabit Modem 320F from the Megabit Modem 310F management interface. The screen option is ATU-R Login and the default setting is Enabled.
Configuring ADSL Service CONFIGURING ADSL SERVICE You configure ADSL transceiver service from the Megabit Modem 310F (ATU-C) only. The ADSL Configuration Menu items are read-only from the Megabit Modem 320F (ATU-R). You must reset the ADSL Link to activate ADSL configuration changes (page 26). This section describes how to configure ADSL data transmission parameters. 1 From the Main Menu (page 11), type 07/20/99 2 to display the ADSL Menu. PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.
Chapter 4: Configuring the Modems Configuring the Startup Settings You can configure these settings only from the Megabit Modem 310F for both the Megabit Modem 310F and 320F. The fields are Read Only Parameters when you access them through the management interface for the Megabit Modem 320F. You configure the Startup Option and Startup SNR Margin to establish how the modem comes up to achieve a transmission rate after a reset (see page 26 for resetting the modem).
Configuring ADSL Service Configuring Data Rates You can configure the data rate only from the Megabit Modem 310F for both the Megabit Modem 310F and 320F. The data rate fields are Read Only Parameters when you access them from the Megabit Modem 320F (ATU-R). You configure the minimum and maximum data rates for both upstream and downstream traffic. The maximum data rates determine the rate the modem must achieve to come up when the startup option is set to Fixed Rate (see page 21).
Chapter 4: Configuring the Modems c Type 5 to select (Min) Down Data Rate. The following message displays: Enter valid input d Type a maximum downstream data rate, in kbps, then press ENTER . The valid data rate values are increments of 32 between 64 kbps and 7040 kbps. If you enter a value that is not an increment of 32, the modem automatically adjusts it to the closest increment of 32. The default is 64 kbps.
Configuring ADSL Service Configuring Alarms You can configure the severity of each modem alarm, or disable alarms. 1 From the ADSL Configuration Menu (page 20), type 2 Type N 9 to select Alarm Configuration. to move to the next alarm type until you select the one you want to configure. The following table identifies the available alarm types.
Chapter 4: Configuring the Modems Configuring the Interleave Options It is important to note that an increase in impulse noise immunity causes an increase in delay. Use the interleave option to increase impulse noise immunity. The delay is in milliseconds for both the Up and Down Interleave Options (upstream and downstream traffic). 1 From the ADSL Configuration Menu (page 20), type 2 Press the SPACEBAR A to select Up Interleave Option.
Configuring ADSL Service Resetting the ADSL Link After you make any ADSL configuration changes, you must reset the ADSL link to activate the new configuration and reestablish the ADSL link. 1 From the ADSL Menu (page 20), type 6 to reset the ADSL link. The following prompt displays: This will bring down the ADSL link. Are you sure (Y/N)? When you select yes, the modem automatically resets the ADSL link between the Megabit Modem 310F and 320F.
Chapter 4: Configuring the Modems CONFIGURING BRIDGE PARAMETERS Configure the Ethernet bridging parameters. The LAN mode for the Megabit Modem 310F and 320F is half duplex. 1 On the Main Menu (page 11), type 09/09/99 3 to display the Bridge Menu. PAIRGAIN TECHNOLOGIES 03:36:55 ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 BRIDGE MENU 1. 2. 3. 4.
Configuring Bridge Parameters Configuring the Source Address Database The source address database can contain up to 8,192 entries. Addresses can be entered either automatically through address learning on the LAN port, or manually. Each address is mapped to a 10-bit key, which is used to group the addresses into 1,024 separate buckets containing up to eight addresses in each bucket.
Chapter 4: Configuring the Modems The following table describes the data displayed on the Source Address Database Menu. 2 Column Description TYPE Indicates the method by which the entry was added to the table. The options are: DYN Dynamic is automatically learned by the LAN port. STAT Static is entered manually. --- Indicates that the table row is empty. VALID VAL - Indicates that the entry is valid and being used. INV - Indicates that the entry is not being used.
Configuring Bridge Parameters 5 To add a static MAC address to the Bridge Address Table: a Type 4 to select Create Static MAC Address Entry. The message displays: Please enter MAC Address (aa:bb:cc:dd:ee:ff) 6 ENTER . b Type the MAC address, then press c Type U to update the data in the current bucket, or type Static MAC Address Entries. 6 to Display All To delete a static MAC address from the Bridge Address Table: a Type 5 to select Delete Static MAC Address Entry.
MONITORING CIRCUIT STATUS AND DISPLAYING SYSTEM INFORMATION 5 Monitor circuit status for the Megabit Modem 310F and 320F using an ASCII terminal or PC running a terminal emulation program, connected to the RS-232 port. MONITORING ADSL STATUS From the Main Menu (page 11), type 2 to display the ADSL Menu. From this menu, you can select items 1 through 4 to provide status on the ADSL link, as described in the following sections. 07/20/99 PAIRGAIN TECHNOLOGIES ATU-R ADSL MEGABIT MODEM TERMINAL v 1.
Monitoring ADSL Status Monitoring ADSL Performance Status The ADSL Performance Status screen is updated every second and provides a summary of the current ADSL status, including alarms, for both upstream and downstream traffic. The SNR (signal-to-noise ratio) Margin row displays both the current SNR margins and the minimum SNR margins for the current 24-hour data collection period. On the ADSL Menu (page 31), type 07/20/99 1 to display the ADSL Performance Status screen.
Chapter 5: Monitoring Circuit Status and Displaying System Information The following table describes the data displayed on the ADSL Performance Status screen. Field Meaning Down Alarms Identifies the current downstream alarms (toward the Megabit Modem 320F).
Monitoring ADSL Status Monitoring 24 Hour ADSL Performance History The 24 Hour ADSL Performance History report consists of eight screens. Each screen displays three hours of data, in 15-minute increments. Together, the eight screens provide a summary of the 24-hour performance history. From the ADSL Menu (page 31), type 07/20/99 2 to open the 24 Hour ADSL Performance History screen. PAIRGAIN TECHNOLOGIES ATU-R ADSL MEGABIT MODEM TERMINAL v 1.
Chapter 5: Monitoring Circuit Status and Displaying System Information Monitoring 7 Day ADSL Performance History The 7 Day ADSL Performance History menu displays the ES and UAS counts, and the minimum SNR margins for the current day and the previous six days. Each day begins at 12 A.M. midnight, therefore the current day count is not necessarily equal to the count for the past 24 hours. From the ADSL Menu (page 31), type 07/20/99 3 to open the 7 Day ADSL Performance History screen.
Monitoring ADSL Status Monitoring ADSL Alarm History The ADSL Alarm History screen displays the current status and first and last occurrence of each ADSL alarm type. From the ADSL Menu (page 31), type screen. 07/20/99 4 on the ADSL Menu to open the ADSL Alarm History PAIRGAIN TECHNOLOGIES ATU-R ADSL MEGABIT MODEM TERMINAL v 1.
Chapter 5: Monitoring Circuit Status and Displaying System Information The following table describes the information displayed on the ADSL Alarm History screen. Name Description Type Identifies local, remote, and ADSL link alarms: • LOF: Loss of frame failure • MARGIN: Low SNR margin alarm • ES: Errored seconds • SES: Severely errored seconds • LOS: Loss of signal • SELFTEST: Whether the self test was successful or not. • LAST CLEARED: The time the screen was last cleared.
Monitoring Ethernet Bridge Statistics MONITORING ETHERNET BRIDGE STATISTICS The Megabit Modem 310F and 320F provide real-time, non-disruptive monitoring of system performance. The display is updated every second. 1 From the Main Menu (page 11), type 08/12/99 2 to open the Bridge Menu. PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.0 00:15:45 BRIDGE MENU 1. 2. 3. 4.
Chapter 5: Monitoring Circuit Status and Displaying System Information 2 From the Bridge Menu, type 08/12/99 3 to open the Bridge Statistics Menu. PAIRGAIN TECHNOLOGIES ATU-C ADSL MEGABIT MODEM TERMINAL v 1.
Monitoring Ethernet Bridge Statistics The following table describes the data displayed on the Bridge Statistics Menu. 40 Field Definition Rx Bytes The number of bytes received. Rx Frames The number of frames received. Rx MCASTS The number of multicast frames received. Rx Errors The number of errored frames received. Rx Runts The number of frames received that are smaller than the Ethernet minimum of 64 bytes.
Chapter 5: Monitoring Circuit Status and Displaying System Information DISPLAYING SYSTEM INFORMATION The System Information screen provides general product information, such as hardware serial numbers and software revision numbers. 1 1 From the Main Menu (page 11), type 2 From the System Menu, type 1 to display the System Information screen. This screen provides the information described in the table below. 07/20/99 to open the System Menu.
Displaying System Information 42 Megabit Modem 310F and 320F User Manual
ABOUT THE TECHNOLOGY A This appendix provides more information about the bridging and ADSL transmission features of the Megabit Modem 310F and 320F. MAC LAYER BRIDGING A bridge moves information across an internetwork from a source to a destination at the link layer (of an OSI reference model). The information is forwarded or filtered based on its Media Access Control (MAC) address.
Ethernet Frame Rates ETHERNET FRAME RATES The following sections show Ethernet maximum frame transmission rates, dependent on the additional bit and bit stuffing set for the xDSL transmission. Minimum xDSL Bit Stuffing, One Additional Bit Ethernet Data rate 10 Mbps Preamble 8 bytes CRC 4 bytes Interframe gap 9.
Appendix A: About the Technology The values in the table below show the minimum xDSL transmission time in milliseconds (ms). Frame Size (da:sa:lt:data:crc) [bytes] xDSL Data Rate 7040 kbps 6400 kbps 3200 kbps 1536 kbps 896 kbps 768 kbps 384 kbps 64 kbps 64 0.074 0.081 0.163 0.339 0.581 0.678 1.357 8.141 128 0.147 0.161 0.323 0.673 1.153 1.345 2.690 16.141 512 0.583 0.641 1.283 2.673 4.581 5.345 10.690 64.141 1024 1.165 1.281 2.563 5.339 9.153 10.678 21.357 128.
Ethernet Frame Rates Maximum xDSL Bit Stuffing, Zero Additional Bits Ethernet Data rate 10 Mbps Preamble 8 bytes CRC 4 bytes Interframe gap 9.60E-06 s xDSL Flags 1 byte FCS 2 bytes Protocol 2 bytes Overhead/Frame 5 bytes Additional bits 0 bits Bit stuffing max (min/max) The values in the table below show the frames per second for the maximum xDSL rate. Frame Size (da:sa:lt:data:crc) [bytes] 46 xDSL Data Rate 7040 kbps 6400 kbps 3200 kbps 1536 kbps 64 11,318.3 10,289.4 5,144.
Appendix A: About the Technology The values in the table below show the minimum xDSL transmission time in milliseconds (ms). Frame Size (da:sa:lt:data:crc) [bytes] xDSL Data Rate 7040 kbps 6400 kbps 3200 kbps 1536 kbps 896 kbps 768 kbps 384 kbps 64 kbps 64 0.088 0.097 0.194 0.405 0.694 0.810 1.620 9.719 128 0.176 0.193 0.386 0.805 1.379 1.609 3.219 19.313 512 0.699 0.769 1.538 3.205 5.494 6.410 12.820 76.922 1024 1.397 1.537 3.074 6.405 10.980 12.810 25.620 153.
Rate Adaptive Transmission Rate Adaptation With ADC's rate adaptive technology, the Megabit Modem 310F and 320F can automatically adjust to the fastest speed possible, given the transmission distance and line conditions. Or, you can set the modem to a specific rate.
Appendix A: About the Technology Tomcat RT & CO-AFE Upstream Start-Up Margin 1000 900 Data Capacity (kbps) 800 700 600 500 400 300 200 100 0 0 2000 4000 6000 8000 10000 12000 14000 16000 Length 26 AWG Tomcat RT & CO-AFE Downstream Start-Up Margin 8000 7000 Data Capacity (kbps) 6000 5000 4000 3000 2000 1000 0 0 2000 4000 6000 8000 10000 12000 14000 16000 Length 26 AWG The reach tables above are for a noiseless environment. The performance shown is typical for ADC Megabit Modem products.
Rate Adaptive Transmission You can configure the Megabit Modem 310F and 320F startup margin setting. This setting defaults to 4 dB but may be set from 0 - 15 dB. The modems will attempt to come up at the programmed margin setting. Setting the margin high allows for a cushion against changing line conditions and impulse noise.
TECHNICAL SPECIFICATIONS AND CONNECTOR PINOUTS B TECHNICAL SPECIFICATIONS ADSL Line Signal Format DMT Line Code Transmit Signal Power up to 23 dBm Connector RJ-11 Ethernet Port Connector 8-pin modular, 10BASE-T Bandwidth Filtering 14 Kpps (64-byte packets, both directions) Address Learning 8,192 MAC addresses with aging Encapsulation Format HDLC Bridging IEEE 802.1d transparent with learning on the LAN port only Physical Height 1.25 in (3.175 cm) Width 6.75 in (17.15 cm) Depth 5.5 in.
Compliance Electrical Power Input 100 to 240 Vac, 50-60 Hz Power Dissipation Megabit Modem 320F (ATU-R) 3W Megabit Modem 310F (ATU-C) 4W Environmental Operating Temperature +32 to +122 °F (0 to 50 °C) Relative Humidity 0 to 95% non-condensing Operating Altitude -200 to 13,000 ft. (-61 to 3962 meters) Electromagnetic Emissions Per FCC Part 15 Class B Storage Temperature -40 to 158 °F (-40 to 70 °C) Storage Altitude -1,000 to 30,000 ft.
Appendix B: Technical Specifications and Connector Pinouts CONNECTOR PINOUTS The following table shows connector pin assignments for the RJ-11 DSL connector. Pin Signal 1 Not Used 2 Not Used 3 ADSL Ring 4 ADSL Tip 5 Not Used 6 Not Used The following table shows connector pin assignments for the 8-pin10BASE-T Ethernet connector. The connector is MDI-X.
Connector Pinouts The following table shows connector pin assignments for the 8-pin RS-232 port connector.
CONTACTING ADC C ADC Customer Service Group provides expert pre-sales and post-sales support and training for all its products. Technical support is available 24 hours a day, 7 days a week by contacting the ADC Technical Assistance Center (TAC). Sales Assistance • Quotation Proposals 800.366.3891 extension 73000 (USA and Canada) • Ordering and Delivery 952.917.3000 • General Product Information Fax: 952.917.3237 Systems Integration • Complete Solutions (from concept to installation) 800.366.
Limited Warranty LIMITED WARRANTY ADC DSL Systems, Inc. (“ADC”) warrants that, for a period of 12 months from the date of shipment, the hardware portion of its products will be free of material defects and faulty workmanship, under normal use.
GLOSSARY D The Glossary defines technical terms and abbreviations used in this manual. ADSL Asymmetric Digital Subscriber Line. A method of transmitting at different downstream and upstream speeds. Asymmetric Transmission Transmission which sends data at different rates in each direction. ATU-C ADSL Terminal Unit at the service provider site. ATU-R ADSL Terminal Unit at the remote site.
Line code Any method of converting digital information to analog form for transmission on a communication line. Link Another term used for transmission line. MAC Media Access Control. Associated with Layer 2 or the Data Link Layer of the ISO 7-layer protocol model. Margin An ADSL parameter, measured in dB. It indicates the excess SNR, relative to the performance of 10-7 BER, at the receiver point. Mbps Megabits per second. 1,000,000 bits per second. MDI Media Dependent Interface.
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