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Megabit Modem CRA-C User Manual

TECHNICAL SPECIFICATIONS

ADSL Line

Signal Format

CAP Line Code

Transmit Signal Power

up to 23 dBm

Connector

RJ-48

Ethernet Port

Connector

RJ-45, 10BASE-T

Bandwidth Filtering

14 Kpps (64-byte packets, both
directions)

Forwarding Performance

2.7 Kpps

Address Learning

2000 MAC addresses with aging

Encapsulation Format

Low-overhead HDLC or PPP

Bridging

IEEE 802.1d transparent with
Spanning Tree Protocol

Routing

Static IP maps

Physical

Height

2.2 inches (5.6 cm)

Width

7.5 inches (19.0 cm)

Depth

9.5 inches (24.13 cm)

Electrical

Power Input

100 to 130 VAC, 60 Hz

Power Dissipation

8 W

Environmental

Temperature

0 to 50°C

Relative Humidity

0 to 85%

Electromagnetic Emissions

Per FCC Part 15 Class A

Summary of Contents for CRA-C

Page 1: ...Megabit Modem CRA C User Manual Power 10BASE T ADSL Manual Number 425 613 150 02...

Page 2: ...ritten consent of PairGain PairGain is a registered trademark and Megabit Modem is a trademark of PairGain Technologies Inc Other product names mentioned in this manual are used for identification pur...

Page 3: ...here 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...

Page 4: ...at Product name Megabit Modem CRA C conforms to the following Standards EN55022 1987 EN50082 1 1992 EN60950 1994 Application of Council Directives 89 336 EEC 73 23 EEC I the undersigned hereby declare...

Page 5: ...a component within a network install the Megabit Modem CRA C configure your unit to operate within the network contact PairGain if you need additional help Three types of messages with icons appear i...

Page 6: ...Using This Manual vi Megabit Modem CRA C User Manual...

Page 7: ...Connect to the ADSL Line 12 Connect to the Data Network 13 Power Up and Check LEDs 16 CONFIGURE AND VIEW STATUS________________________ 17 Connect to an ASCII Terminal 17 How to Log On and Navigate th...

Page 8: ...otocols 61 SNMP 61 Megabit Modem CRA C SNMP Agent 62 MIB and Trap Support 63 Network Configuration and Image Code Download 64 BOOTP 64 TFTP 66 Encapsulation Protocols 66 TECHNICAL SPECIFICATIONS _____...

Page 9: ...eceives the highest data rate available while subscribers farther away receive data at a lower transmission rate The Megabit Modem CRA C has field proven Carrierless Amplitude modulation and Phase mod...

Page 10: ...in SNR margin is the amount of degradation in SNR that the system can tolerate under the current conditions and still achieve a 10 7 BER A margin of 6 dB for example would mean that the SNR can degrad...

Page 11: ...n the highest available rate based on this information Session startup In session startup mode the system uses the data rates set during a previous full startup rather than re assessing the signal qua...

Page 12: ...der group 24 HDSL lines in the same binder group 24 ADSL lines in the same binder group 10 T1 lines in an adjacent binder group one T1 line in the same binder group The performance shown is typical fo...

Page 13: ...About the Megabit Modem CRA C Megabit Modem CRA C User Manual 5 Figure 1 Reach for a Rate Adaptive ADSL Megabit Modem...

Page 14: ...About the Megabit Modem CRA C 6 Megabit Modem CRA C User Manual...

Page 15: ...nspect it for signs of damage If the equipment has been damaged in transit immediately report the extent of damage to the transportation company and to your sales representative Order replacement equi...

Page 16: ...it Modem CRA C to the ADSL line Console cable Flat silver eight wire cable with RJ 45 connectors at each end Plugs into the Console port to connect the Megabit Modem CRA C to an ASCII terminal Do not...

Page 17: ...The Megabit Modem CRA C front panel has LEDs that show status for power and data transmission The rear panel has external interface connectors and a power switch Front Panel Figure 2 and Table 2 desc...

Page 18: ...ansmit activity at port No transmit activity at port COL Green Off Collisions occurring on the port No collisions occurring on the port ADSL SYNC Solid green Flashing green Off Normal operation Traini...

Page 19: ...Do not connect any other wall plug supply to the Megabit Modem CRA C unit otherwise you can permanently damage the unit ON OFF switch Toggle switch used to turn modem ON and OFF CONSOLE port RJ 45 co...

Page 20: ...ne The Megabit Modem CRA C requires a single pair of telephone wires to connect the subscriber to the service provider One wire is the Tip and the other is the Ring See Table 4 for pinouts Connect the...

Page 21: ...RA C to the data network If the data network has an MDI X port use the yellow cross over Category 3 or better cable If the data network has an MDI port use the black straight through Category 3 or bet...

Page 22: ...Install the Megabit Modem CRA C 14 Megabit Modem CRA C User Manual Figure 5 Straight through and Cross over Cable Pinouts...

Page 23: ...k straight through cable or the yellow cross over cable 1 Plug the RJ 45 connector of the Category 3 cable into the 10BASE T MDI X connector on the Megabit Modem CRA C rear panel Figure 6 2 Attach the...

Page 24: ...ON OFF switch on the rear panel The unit enters a self test mode with the following LED indications ADSL STAT LED flashes green ADSL SYNC LED flashes green Power LED lit solid green Allow the Megabit...

Page 25: ...he system settings 24 Configure the ADSL transceiver 26 Configure the Bridge Router 30 View status 41 Log out 49 Connect to an ASCII Terminal Connect the Megabit Modem CRA C to an ASCII terminal 1 Plu...

Page 26: ...Modem CRA C User Manual Figure 7 Connecting to an ASCII Terminal 4 Configure these communication settings for the ASCII terminal 9600 to 19 200 baud no parity 8 data bits stop bit flow control to OFF...

Page 27: ...ou can configure a local and a remote modem The header on each menu screen identifies the modem being monitored or configured ATU C is the ADSL Transceiver Unit ATU at the service provider site which...

Page 28: ...on 2 Type your password at the password prompt or press ENTER ENTER factory default password if you have not customized your password The Main Menu displays 07 02 97 PAIRGAIN TECHNOLOGIES 08 43 18 AT...

Page 29: ...iew Status Megabit Modem CRA C User Manual 21 Figure 8 shows the structure for the Megabit Modem CRA C menus Type the number of the menu item you want to view or configure Figure 8 Megabit Modem CRA C...

Page 30: ...orts C C Clears the current values N N Selects the next page P P Selects the previous page U U Restores previous setting by undoing the last action When configuring Megabit Modem CRA C parameters Togg...

Page 31: ...ubscriber site ATU R At the Main Menu type 4 4 for Remote Logon to display the configuration and status menus for Megabit Modem CRA remote ATU R 07 02 97 PAIRGAIN TECHNOLOGIES 08 43 18 ATU C ADSL MEGA...

Page 32: ...the System Status and Configuration menu 07 02 97 PAIRGAIN TECHNOLOGIES 08 43 23 ATU C ADSL MEGABIT MODEM TERMINAL 01 01 SYSTEM STATUS AND CONFIGURATION 1 SYSTEM INFORMATION 2 SYSTEM CONFIGURATION M...

Page 33: ...ing Type 3 3 and the message Creating user password press ENTER displays Press ENTER ENTER When prompted Please enter the new password type the new password then press ENTER ENTER An appears on the sc...

Page 34: ...DSL MENU 1 ADSL PERFORMANCE STATUS 2 24 HOUR ADSL PERFORMANCE HISTORY 3 7 DAY ADSL PERFORMANCE HISTORY 4 ADSL ALARM HISTORY 5 ADSL TRANSCEIVER CONFIGURATION MENU 6 FULL ADSL RESET 7 SESSION ADSL RESET...

Page 35: ...this rate by assessing the signal quality data line length and noise conditions for example and the SNR value set in option 4 for SNR startup margin It then uses the highest available rate based on th...

Page 36: ...ble the alarm Enabling alarms affects the ADSL STAT LED but not the alarm history The available options for each alarm are E for enabled minor alarm D for disabled alarms and M for enabled major alarm...

Page 37: ...n ENTER CHOICE Type either 6 6 or 7 7 from the ADSL Menu to Reset the ADSL transceiver Table 9 describes the Reset options Table 9 Reset ADSL Transceiver Options Type No For Option Function 6 Full ADS...

Page 38: ...ge Mode link status See View Status page 41 for more information on the Statistics menu Through the Bridge Router Configuration menu you can configure the Megabit Modem as either a bridge to forward E...

Page 39: ...g is Bridge 07 02 97 PAIRGAIN TECHNOLOGIES 08 54 11 ATU C ADSL MEGABIT MODEM TERMINAL 01 01 BRIDGE CONFIGURATION MENU SETTINGS 1 BRIDGE ROUTER MODE BRIDGE 2 LOCAL IP ADDR 192 168 240 10 3 LOCAL SUBNET...

Page 40: ...ends its BOOTP requests directly to this device rather than sending a broadcast packet The default is 0 0 0 0 5 Default Router IP Addr Sets the address of the router which must be used to reach a host...

Page 41: ...RFC 783 to obtain image files Set Local default to load the image file from the application sector of the Megabit Modem CRA C non volatile device if valid The code is valid if the CRC calculated on po...

Page 42: ...ABLE 2 DEFAULT 192 168 240 1 3 192 168 242 0 255 255 255 0 172 16 100 2 4 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 LAN PORT CONF 6 LAN IP ADDR 192 168 240 10 7 LAN SUBNET MASK 255 255 255 0 L...

Page 43: ...3 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 LAN PORT CONF 6 LAN IP ADDR 192 168 242 1 7 LAN SUBNET MASK 255 255 255 0 LINE PORT CONF 8 LINE IP ADDR 172 16 100 2 9 LIN...

Page 44: ...Addr Input the network address of the Megabit Modem CRA C ADSL port Necessary for static IP mapping to function correctly 9 Line Subnet Mask Input the subnet of the Megabit Modem CRA C ADSL port Nece...

Page 45: ...sector of the Megabit Modem CRA C non volatile device if valid The code is valid if the CRC calculated on power up matches the expected CRC If it does not the Megabit Modem CRA C attempts to get a new...

Page 46: ...READ ONLY COMM STRING public 2 SNMP READ WRITE COMM STRING private 3 AUTHENTICATION TRAP STATUS ENABLE 4 TRAP RECEIVER 1 IP ADDRESS 0 0 0 0 5 TRAP RECEIVER 1 COMM STRING public 6 TRAP RECEIVER 2 IP A...

Page 47: ...must match the network manager community string setting of Public or Private The authentication string is required for the Megabit Modem CRA C to correctly respond to SNMP set and get requests 3 Auth...

Page 48: ...uter menu 07 02 97 PAIRGAIN TECHNOLOGIES 08 55 55 ATU C ADSL MEGABIT MODEM TERMINAL 01 01 BRIDGE ROUTER MENU ETHERNET MAC ADDRESS 00 20 A7 20 68 F2 10 BASE T LINK STATUS LINK UP EBM STATUS READY SELEC...

Page 49: ...are revision information as well as the product number and manufacturing information Access the System Information screen by typing 1 1 on the Main Menu then typing 1 1 on the System Status and Config...

Page 50: ...RFORMANCE STATUS 2 24 HOUR ADSL PERFORMANCE HISTORY 3 7 DAY ADSL PERFORMANCE HISTORY 4 ADSL ALARM HISTORY 5 ADSL TRANSCEIVER CONFIGURATION MENU 6 FULL ADSL RESET 7 SESSION ADSL RESET M ain ENTER CHOIC...

Page 51: ...play the ADSL Performance Status screen 07 02 97 PAIRGAIN TECHNOLOGIES 08 45 10 ATU C ADSL MEGABIT MODEM TERMINAL 01 01 ADSL PERFORMANCE STATUS DOWN ALARMS NONE UP ALARMS NONE SYSTEM STATE DATA DOWNST...

Page 52: ...10 7 A margin greater than zero indicates a performance better than 10 7 The system provides a default margin of 6 dB which translates to a performance of 10 10 BER or better See page 2 for informatio...

Page 53: ...snr DOWNSTREAM UPSTREAM 08 45 000 000 13 1 000 000 7 6 08 30 000 000 13 1 000 000 7 6 08 15 000 000 13 1 000 000 7 6 08 00 000 000 13 1 000 000 7 6 07 45 000 000 13 1 000 000 7 6 07 30 000 000 13 1 00...

Page 54: ...CHNOLOGIES 08 46 07 ATU C ADSL MEGABIT MODEM TERMINAL 01 01 7 DAY ADSL PERFORMANCE HISTORY errored seconds unavailable seconds snr DOWNSTREAM UPSTREAM 07 02 97 00000 00000 13 1 00000 00000 7 6 07 01 9...

Page 55: ...N OK SES UP OK SELFTEST OK LAST CLEARED 09 08 97 16 50 45 C lear R eturn M ain ENTER CHOICE Type C C to update the first and last date time stamps and clear the time to 0 The Alarm History data is los...

Page 56: ...pdated every 10 seconds and whenever you access this menu Access the Statistics screen for the bridge by typing 3 3 on the Main Menu then typing 3 3 on the Bridge Router Menu 07 02 97 PAIRGAIN TECHNOL...

Page 57: ...tput buffer for the port Errored Frames The number of frames received in error CRC alignment and dribbling bit from the input buffer ADSL Port Input Frames The number of frames correctly received Outp...

Page 58: ...Configure and View Status 50 Megabit Modem CRA C User Manual...

Page 59: ...s known as a Media Access Control MAC address The Megabit Modem CRA C provides transparent Ethernet MAC level bridging It is a completely self contained bridge with a CPU memory subsystems RAM Flash e...

Page 60: ...Network and Management Overview 52 Megabit Modem CRA C User Manual Figure 9 Spanning Tree Topology...

Page 61: ...he static IP routing feature you can configure the Megabit Modem CRA C as an IP router with statically programmed route entries You can enable this function as a security feature to prevent eavesdropp...

Page 62: ...Network and Management Overview 54 Megabit Modem CRA C User Manual Figure 10 Simple Configuration for Static IP Routing...

Page 63: ...CRA C User Manual 55 Figure 11 shows a more complex example of multiple gateways that use static IP routing to route packets sourced from specific users to different destination gateways Figure 11 Mul...

Page 64: ...rred encapsulation for routing when interfacing with non PairGain equipment HDLC is lower overhead and preferred when interfacing PairGain to PairGain equipment Default Router IP Address Specify the n...

Page 65: ...periodic route updates using protocols like Routing Information Protocol RIP or Open Shortest Path First OSPF so that other external routers can automatically update their routing tables This impleme...

Page 66: ...gement Overview 58 Megabit Modem CRA C User Manual Figure 12 shows an example of a point to point ADSL system and hypothetical values of parameters defined in Tables 17 and 18 Figure 12 Example for St...

Page 67: ...addresses When connecting a Megabit Modem CRA C and a Megabit Modem CRA point to point via ADSL the IP Line addresses are completely isolated and hidden from the rest of the network As a result any va...

Page 68: ...Network and Management Overview 60 Megabit Modem CRA C User Manual Figure 13 IP Addresses...

Page 69: ...o them The NMS communicates with the agents in the managed devices to set configuration get configuration get status A Management Information Base MIB defines these configuration and status parameters...

Page 70: ...r 1 IP Address 0 0 0 0 Trap Receiver 1 Community String null string Trap Receiver 2 IP Address 0 0 0 0 Trap Receiver 2 Community String Null string Authentication Trap enable disable disable ST Enable...

Page 71: ...as configuration status and statistical information that defines its functionality and operational capabilities These elements together are the MIB for the device being managed The MIB defines the kin...

Page 72: ...ogin using anonymous as you log in name use guest or your e mail address as you user password enter cd snmp rex mibs get pgrexmib txt Network Configuration and Image Code Download BOOTP BOOTP is used...

Page 73: ...sponse Once the Megabit Modem CRA C receives a BOOTP response it keeps the IP address boot server default router and any other information associated with the module in the configuration sector of the...

Page 74: ...est first to get the most current network configuration If the BOOTP fails the TFTP session is attempted TFTP conforms to RFC 1350 The TFTP Protocol Revision 2 TFTP uses the connectionless User Datagr...

Page 75: ...erformance 2 7 Kpps Address Learning 2000 MAC addresses with aging Encapsulation Format Low overhead HDLC or PPP Bridging IEEE 802 1d transparent with Spanning Tree Protocol Routing Static IP maps Phy...

Page 76: ...MIB II RFC 1493 bridge MIB base ST transparent groups PairGain xDSL bridge MIB extensions RFC 1215 Traps link state and ST Traps newRoot topology Changed ASCII Terminal Maintenance Port Type RS 232C...

Page 77: ...Customer Service Engineer At other times a request for technical assistance is handled by an on duty Customer Service Engineer through a callback process This process results in a callback normally w...

Page 78: ...Technical Assistance 70 Megabit Modem CRA C User Manual...

Page 79: ...und NTF in which case the buyer will pay for the shipment PairGain may use reconditioned parts for such repair or replacement This warranty does not apply to any product which has been repaired worked...

Page 80: ...urn your equipment to you 3 So we can determine why you re sending the equipment to us let us know which of the following applies to you The equipment needs an ECO ECN upgrade The equipment is defecti...

Page 81: ...nds data at different rates in each direction AWG American Wire Gauge ATU C ADSL Terminal Unit at the service provider site ATU R ADSL Terminal Unit at the remote site Bandwidth Used to describe the c...

Page 82: ...ics Engineers A professional organization that defines network standards I F Interface or Interface Card ISP Internet service provider kbps Kilobits per second A measure of transmission speed at 1 000...

Page 83: ...nces RFC Request for Comment Router Device that decides whether to forward a packet by looking at the protocol level address Service Provider Organization providing and maintaining network services fo...

Page 84: ...Glossary 76 Megabit Modem CRA C User Manual...

Page 85: ......

Page 86: ...Corporate Office 14402 Franklin Avenue Tustin CA 92780 Tel 714 832 9922 Fax 714 832 9924 For Technical Assistance 800 638 0031...

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