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Tahoe 4681 (4-port G.shdsl.bis/FastEthernet modem card)

Installation

Before installing the card make sure that your working site is properly grounded. Hold the card by
the front panel handler and do not touch other components to prevent damage caused by electro-
static discharge.

To install the card in a DSL Access Multiplexer follow these steps:

Find an empty slot and remove a blank panel if the slot is covered:

Insert the card into the slot. Make sure that the card enters two red rails on the top and the

bottom:

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Summary of Contents for 4681

Page 1: ...User Manual Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

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Page 3: ...User Manual Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 4: ...TO BE ACCURATE BUT ARE PRESENTED WITHOUT WAR RANTY OF ANY KIND EXPRESS OR IMPLIED AND TAHOE MAKES NO COMMITMENT TO UPDATE THE INFORMATION CONTAINTED HERE NOTWITHSTANDING ANY OTHER WARRANTY HEREIN ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED AS IS TAHOE DISCLAIM ALL WARRANTIES EXPRESSED OR IMPLIED INCLUDING WITHOUT LIMITATION THOSE OF MERCHANTABILITY FITNESS FOR A PAR TICULAR PUR...

Page 5: ...LAN 2 Status LEDs 2 Installation 3 Advanced Conﬁguration and Management 5 Telnet Connection 5 Internal Backplane Connection 5 Commands Summary 6 DHCP Server Conﬁguration 25 Appendix A Troubleshooting 31 Appendix B Technical Speciﬁcation 32 Appendix C Safety Information 33 Appendix D Declaration of Conformity 35 ...

Page 6: ...IV Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 7: ...r Chapter 3 Advanced Conﬁguration and Management List of commands used to conﬁgure the modem using serial console or telnet connection Appendix A Troubleshooting Description of typical problems that may occur during use of the modem Appendix B Technical Speciﬁcation Parameters of the modem Appendix C Safety Information Important information about hazards involved with us age of electrical devices ...

Page 8: ...ypewriter font Information that must be entered during a serial or telnet connection LCD font Information displayed on the LCD Note Notes contain helpful suggestions that may be worth remembering Caution This symbol means a situation that requires you to be careful Otherwise equipment damage or loss of data may occur Warning This warning symbol means danger You are in a situation that could cause ...

Page 9: ...bilities for the use of the copper lines Tahoe 4681 modem card contains four G shdsl bis modems which allow data transmission with speeds up to 5696 kbps on a 2 wire line 11392 kbps on a 4 wire line and 22784 kbps on an 8 wire line Thanks to powerful TCPAM 32 modulation throughputs are much higher than using HDSL technology and reach is nearly twice that of VDSL Front Panel Leased Line Four 6 pin ...

Page 10: ... should be connected to an Ethernet switch or a hub using a straight patch cord or to a PC a router or an uplink port in a switch using a crossed over After connecting the cable a LED named LAN Link should light up Status LEDs Besides LEDs on the LAN connector there are four LEDs representing state of the G shdsl link Three behaviours of these LEDs are possible oﬀ line is not connected no signal i...

Page 11: ...the card by the front panel handler and do not touch other components to prevent damage caused by electro static discharge To install the card in a DSL Access Multiplexer follow these steps Find an empty slot and remove a blank panel if the slot is covered Insert the card into the slot Make sure that the card enters two red rails on the top and the bottom ...

Page 12: ...ing the power oﬀ The DSLAM management card will automatically detect new device and display its status on the LCD The card can be conﬁgured through a telnet connection or using the DSLAM management card Conﬁguration using telnet is described in next chapter while the management card conﬁgura tion is described in Tahoe Network Management Card User Manual ...

Page 13: ...nywhere in the network After connecting a password prompt will appear User Access Verification Password The default password is Tahoe case sensitive If the password entered is correct a command prompt will appear Tahoe Internal Backplane Connection If the telnet connection is not possible e g there s no telnet client available or the modem s IP address is unknown you can connect to the modem throu...

Page 14: ...ﬁguration exit closes connection with modem help displays command list http web server conﬁguration ifconﬁg interface conﬁguration ipchains NAT PAT ﬁrewall settings keypad LCD keyboard locking lang language selection lcd LCD text modiﬁcation masq NAT status mem memory usage mii MII Ethernet transceiver settings more enables or disables more prompt netstat TCP IP connections list ping checks networ...

Page 15: ... writes settings to EEPROM Shows a list of available commands arp The arp command is used to conﬁgure the ARP table The arp alone shows the list of bindings between IP and hardware MAC addresses Tahoe arp IP address Hardware address Type Expires 10 0 0 2 00 50 04 0D 70 31 dynamic 215s Tahoe The Type can be dynamic learnt from the network traﬃc static added manually or proxy a proxy ARP entry The v...

Page 16: ...idge The bridge command enables or disables the bridge mode in which two interconnected LANs create united one in the hardware layer The stations in both LANs behave like if they were con nected to one Ethernet switch e g PCs working under Microsoft Windows operating system will see each other in the network neighbourhood Following settings are available off regular TCP IP Layer 3 routing on the b...

Page 17: ...umber adds a line to a bundle Tahoe bundle wan0 add 1 bundle interface del line number removes a line from a bundle Tahoe bundle wan0 del 1 bundle interface link hdlc raw fr ppp selects the link protocol Cisco HDLC raw HDLC Frame Relay or synchronous PPP The Cisco HDLC proto col hdlc option should be used in most cases the others are provided for compatibility only bundle interface speed value set...

Page 18: ...ating the DSL connection bundle interface reset renegotiates connection on all lines in the bundle bundle show shows current settings conﬁg The conﬁg command displays current conﬁguration The command output can be entered on another modem to make an exact copy of the conﬁguration console This command is used to enable or disable password protection of the serial console By default the console is u...

Page 19: ... to 5696 kbps per line while TCPAM16 from 128 kbps to 2304 kbps and TCPAM4 64 kbps The auto setting forces use of TCPAM32 for speeds greater than or equal to 256 kbps per line and TCPAM16 or TCPAM4 for lower rates dsl line txgain value sets transmitter gain The gain can range from 0 0 to 1 6 The modem reach may be slightly higher if the gain is increased New mode is set after renegotiating the DSL...

Page 20: ...ing the network interfaces Following interface names are avail able eth0 Ethernet interface eth0 1 eth0 2 etc VLAN networks LAN networks separated from each other al though using the same cabling wan0 wan1 etc G shdsl bundle the WAN interface This command has similar syntax as the Linux ifconﬁg Tahoe ifconfig interface name IP address netmask network mask bcast broadcast address static dynamic bri...

Page 21: ...ing parameters can be added Tahoe ipchains add insert del s source subnet netmask port range d destination subnet netmask port range p tcp udp icmp y m IP address accept deny masq pat IP address port s source subnet netmask port range Deﬁnes the source addresses that this entry concerns If this parameter is omitted then the entry applies to all source addresses The port range can be speciﬁed only ...

Page 22: ...tions without public IP addresses that are hidden from the outside network The modem always chooses the ﬁrst matching rule from the list So if the more general rule comes ﬁrst and the more speciﬁc is later then the former will be applied and the latter ignored Thus the speciﬁc rule has to be inserted before the general one as in following example Tahoe ipchains add s 215 16 11 0 24 deny Tahoe ipch...

Page 23: ...connection inactivity and the amount of remaining free table entries that can be used for new connections mem Mem shows the memory usage statistics The free entry shows how much free memory is left and the free bufs informs about the amount of free memory destined for network packet mii The mii command allows access to the Ethernet transceiver Following options are available status displays Ethern...

Page 24: ...when the results of this command do not ﬁt one screen The syntax is more on off netstat Shows a list of TCP connections ping Checks the availability of a device with selected IP address For example ping 10 0 0 2 displays the time necessary to send packet to the 10 0 0 2 station and back or reports its unavailability Tahoe ping 10 0 0 2 PING 10 0 0 2 64 bytes 64 bytes from 10 0 0 2 seq 0 ttl 64 tim...

Page 25: ...current routing table It may be modiﬁed using following options route add address interface adds the route to a speciﬁc host directly through the interface the station with this address has to be in the network directly connected to that interface route add address gw gateway adds the route to a speciﬁc host through a gate way route add net address netmask network mask interface adds the route to ...

Page 26: ...ommunity private SNMP host1 any SNMP host2 disabled SNMP host3 disabled Tahoe snmp on enables SNMP support snmp off disables SNMP support snmp rdcomm community sets the read community the password used to read the SNMP parameters snmp wrcomm community sets the write community the password used to write the SNMP parameters snmp host1 address snmp host2 address snmp host3 address allows setting of u...

Page 27: ...the ARP reply from the modem is received the PC will show an error message saying that the IP address is occupied and an illegal use of that IP address would be impossible The strictarp mode may be disabled using strictarp oﬀ syslog The modem may send the messages about its status and important events to a syslog server To conﬁgure syslog logging following commands may be used syslog on enables lo...

Page 28: ...p The tcpdump command is used to monitor the network traﬃc on a speciﬁed interface When no interface is speciﬁed eth0 is used by default Tahoe tcpdump wan0 05 51 27 453 cisco hdlc 56 IP 192 168 20 101 192 168 14 67 ICMP echo request seq 2 05 51 27 541 cisco hdlc 62 IP 192 168 14 67 192 168 20 101 ICMP echo reply seq 2 To stop monitoring traﬃc press Ctrl C tftp The command allows limiting the TFTP ...

Page 29: ...tings uptime Shows the time elapsed since the modem booting and the current processor temperature user The user command is used to manage users having access to the modem The modem may work in two diﬀerent modes single user only the password is necessary to access the modem The user that logs in has the full access to the device default mode multiple users allows creating many users with diﬀerent ...

Page 30: ... transparent the modem may be set up to analyse the traﬃc and some packets may be directed to speciﬁed interfaces while others may be ﬁltered Also VLAN headers may be removed or added while forwarding a packet thus encapsulating a data stream from a speci ﬁed interface into a VLAN The command has following syntax vlan show shows current settings vlan transparent on off enables or disables the tran...

Page 31: ...rs will be added to all untagged i e regular packets received on that interface This way only regular Ethernet packets would appear on that interface so you can connect regular Eth ernet devices while the modem will see VLAN traﬃc only Such VLAN traﬃc can be sent further to other devices without being mixed with packets coming from other sources The non VLAN traﬃc is directed to a default VLAN wit...

Page 32: ... interval amount wait IP address additional IP address conﬁgures the watchdog After interval seconds the modem sends amount of pings to the IP address and the additional IP address if set waiting wait seconds after each of them If there is no answer for any of the pings sent to the ﬁrst address or for any of the pings sent to the second address then the modem is rebooted write Saves the current co...

Page 33: ...dress print server syslog server XWindow fontserver MTU and TTL settings and many others DHCP BOOTP Relay Agent transfers DHCP and BOOTP requests and replies between separate networks The DHCP and BOOTP protocols work only within one physical subnet The station using such protocols doesn t know its IP address yet so its packets cannot be routed to other networks Relay Agent listens for such reques...

Page 34: ...a subnet within a network causes copying of the options from the parent group e g if the lan network has a domain name option after adding a subnet named local within the lan the option will be automatically copied it may be modi ﬁed or deleted later on the beginning a network for each interface should be created in each of the networks an IP subnet should be created according to IP subnets connec...

Page 35: ...ress Adds a static connection between hardware MAC and IP addresses The IP address must belong to one of the conﬁgured subnets Only this IP address will be assigned to the given MAC address Tahoe dhcp add host server 00 50 13 2e 15 ca 10 0 0 5 dhcp add range start address end address Adds an IP address range from which addresses will be assigned to the network stations The address range must be co...

Page 36: ... commands above delete respectively a network an IP subnet or a host a static IP MAC connection with given name dhcp del relay address Deletes a DHCP server address used in the Relay Agent mode dhcp del range start address end address Deletes an IP address range assigned to the network stations dhcp del option name value Deletes a global option Besides the option name its value should also be give...

Page 37: ...e dhcp add command description above Besides these standard options two other parameters can be set dhcp network default lease time value Sets the time in second for which the IP address is assigned to the station After that time the station must inform the DHCP server that it still uses that address Otherwise the ad dress will be considered as unused This time out prevents blocking an IP address ...

Page 38: ...30 Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 39: ... Ethernet interface The data isn t transferred at full speed or the throughputs are asymmetrical higher in one direction and lower in the other direction check if the Noise Margin Signal Noise Ratio is greater or equal to 6 dB decrease the line throughput if it the NMR is too low ensure that the modem and the LAN device on the other end of the cable has the same Ethernet interface setting either a...

Page 40: ...32 Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 41: ...interface connector 4 x RJ 11 standards ITU G 991 2 G shdsl ITU G 994 1 G hs modulations TCPAM 32 TCPAM 16 TCPAM 8 TCPAM 4 PAM 16 PAM 8 PAM 4 PAM 2 throughput 64 5696 kbps per line 256 22784 kbps aggregate Ethernet interface 10 100Base T RJ 45 connector dimensions 30 mm width x 128 mm height x 185 mm depth power consumption 10W environmental conditions storage temperature 20 C to 65 C humidity 5 t...

Page 42: ...34 Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 43: ...e familiar with standard practices for preventing accidents Read the installation instructions before you connect the device to its power source Do not work on the system or connect or disconnect cables during periods of lightning activity Do not connect the low voltage circuits LAN port to leased line circuits G shdsl port Some LAN and WAN ports use RJ 45 connectors Use caution when connecting ca...

Page 44: ...36 Tahoe 4681 4 port G shdsl bis FastEthernet modem card ...

Page 45: ...quirements of the above mentioned directives is en sured by complete application of the following harmonized European Standards EN 60950 2000 EN 55022 1998 EN 61000 6 1 2002 EN 61000 6 3 2002 The product also complies with the Directive 2002 95 EC on the restriction of the use of cer tain hazardous substances in electrical and electronic equipment RoHS Directive with the exemptions applicable for ...

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Page 52: ...Uniwersytecka 1 50951 Wrocław Poland phone 48 71 344 26 37 fax 48 71 344 26 42 www tahoe group com ...

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