
UM_MDS921AE-10BTS-R2-SMARTLINK_
-MDS957AE-10BTS-R2-SMARTLINK_v1-4-081019v1-2-070301.doc

SMARTLINK
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MDS921AE-10BTS - MD
part or as a whole, transcribed, stored in a retrieval system, translated
transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
photocopying, manual, or otherwise, without the prior written permission of
. The contents of this publication may not be reproduced in any

SMARTLINK
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EU Directive 2002/96/EC and EN50419
This equipment is marked with the above recycling symbol. It means that at the
end of the life of the equipment you must dispose of it separately at an appropriate
collection point and not place it in the normal domestic unsorted waste stream.
Major changes to previous version
Housing and Design Changes
Multi-Pair and Multi-Link modes

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VLAN (Virtual Local Area Network)
Getting to know about the router
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Configuration to the router
Step 1: Check the Ethernet Adapter in PC or NB
Step 2: Check the Terminal Access Program
Step 3: Check the Web Browser in PC or NB
Step 4: Determine Connection Setting
Step 5: Install the SHDSL Router
Configuration via Web Browser
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Advanced Setup SHDSL router
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Advanced Setup. SHDSL.bis router
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LAN connection with bridge Mode
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LAN to LAN Connection with Routing Mode
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Configuration via Serial Console or Telnet with Manu Driven
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Configuration via Serial Console or Telnet
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SMARTLINK
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modem family includes ATM G.shdsl or G.shdsl.bis routers especially designed to
be Ethernet Extenders for LAN
The SHDSL (Symmetric High Speed Digital Subscriber Loop) routers comply with G.991.2 or
G.991.2(2004) standard with 10/100 Base
range form 192Kbps to 2.304Mbps (5.696Mbps with SHDSL.bis)
pair copper wire or from 384Kbps to 11.392Mbps payload rates over existing two
The SHDSL routers are designed not only to optimize the service bit rate from central office to
customer premises also it in
DMZ, virtual server mapping and VPN pass
Because of rapid growth of network, virtual LAN has become one of the major new areas in
internetworking industry. The SHDSL
The firewall routers provide not only advanced functions, Multi
through but advanced firewall, SPI, NAT, DoS protection serving as a powe
to protect from outside intruders of secure connection.
The SHDSL routers allow customers to leverage the latest in broadband technologies to meet their
growing data communication needs. Through the power of SHDSL products, you can access
superior manageability and reliability.
Easy configuration and management with password control for various application
Efficient IP routing and transparent learning bridge to support broadband Internet
Virtual LANs (VLANs) offer significant benefit in terms of efficient use of bandwidth,
flexibility, performance and security
in advanced SPI firewall (Firewall router)
Internet for the cost of IP address
Fully ATM protocol stack implementation over SHDSL
PPPoA and PPPoE support user authentication with PAP/CHAP/MS
SNMP management with SNMPv1/SNMPv2 agent and MIB II
-to-LAN and ISP-to-LAN applications.
negotiation. It provides business
payload rates over exiting
end Bridging/Routing capabilities with advanced
router supports port-based and tag
DMZ, virtual server mapping and
-NAT enables multiple workstations
new features via Internet software upgrade

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Support IP/TCP/UDP/ARP/ICMP/IGMP protocols
IP routing with static routing and RIPv1/RIPv2 (RFC1058/2453)
IP multicast and IGMP proxy (RFC1112/2236)
Network address translation (NAT/PAT) (RFC
NAT ALGs for ICQ/Netmeeting/MSN/Yahoo Messenger
DNS relay and caching (RFC1034/1035)
DHCP server, client and relay (RFC2131/2132)
• IEEE 802.1D transparent learning bridge
Spanning tree protocol (option)
Security
• DMZ host/Multi-
Virtual server mapping (RFC1631)
through for PPTP/L2TP/IPSec tunneling
Advanced Stateful packet inspection (SPI) firewall (Firewall Router)
Application level gateway for URL and keyword blocking (Firewall Router)
User access control: deny certain PCs access to Internet service (Firewall Router)
Management
• Easy-to-use web-
based GUI for quick setup, configuration and management
Password protected management and access control list for administration
SNMP management with SNMPv1/SNMPv2 (RFC1157/1901/1905) agent and MIB II
OAM F5 AIS/RDI and loopback
UBR (Unspecified bit rate)
rt (Variable bit rate real
nrt (Variable bit rate non
Ethernet over ATM (RFC 2684/1483)
Classical IP over ATM (RFC 1577)
PPP over Ethernet for fixed and dynamic IP (RFC 2516)
PPP over ATM for fixed and dynamic IP (RFC 2364)
User authentication with PAP/CHAP/MS
line interface (CLI) for local console and Telnet access

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WAN Interface
• SHDSL: ITU-
T G.991.2 (Annex A, Annex B) (SHDSL router)
T G.991.2 (2004) Annex A/B/F/G (SHDSL.bis router)
SHDSL, single pair: N x 64Kbps (N=3~36, 0 for adaptive)
LAN Interface
• 10/100 Base-T auto
port router: 4x 10/100 Base
Hardware Interface
• WAN: RJ- 45
• LAN: RJ-45 4x
•
Reset button for factory default
Indicators
• Local
• Renmote
•
LAN. Led located on a back panel
Dimensions: 18.7 x 3.3 x 14.5cm (WxHxD)
Power: 9VDC, 100~240VAC (via power adapter)
Power consumption: 9 watts max
2MB Flash Memory, 8MB SDRAM
N x 64Kbps (N=3~89, 0 for adaptive)
sensing and auto-negotiation

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DESKTOP (Smartlink I & II), Ethernet Bridge Router, VLAN
DeskTop
ATM
Bridge
MDS921AE-10BTS
MDS957AE-10BTS
Router
Ethernet Bridge
Single Pair SHDSL
Dual Pair SHDSL
Single Pair SHDSL.bis
Dual Pair SHDSL.bis
Multi-Service
Point to Point
Point to Multipoint
9V-DC
Internal 4 Port Ethernet Switch
Firewall
VLAN Support
Console Port Management
Web Management
Telnet Management
SNMP Management

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Application with DSLAM, ISP
LAN Ethernet Extension with Link Protection
Ethernet Extension in Multi
-to-LAN Ethernet Extension
-to-LAN Ethernet Extension
Main Link
Standby Link
-Link mode
Ethernet
Ethernet
TC-PAM

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A firewall protects networked computers from intentional hostile intrusion that could compromise
confidentiality or result in data corruption or denial of service. It must have at least two network
interfaces, one for the network it is intended to protect,
firewall sits at the junction point or gateway between the two networks, usually a private network
and a public network such as the Internet.
A firewall examines all traffic routed between the two networks to
does, it is routed between the networks, otherwise it is stopped. A firewall filters both inbound and
outbound traffic. It can also manage public access to private networked resources such as host
n be used to log all attempts to enter the private network and trigger alarms when
hostile or unauthorized entry is attempted. Firewalls can filter packets based on their source and
destination addresses and port numbers. This is known as address filtering
filter specific types of network traffic. This is also known as protocol filtering because the decision
to forward or reject traffic is
Firewalls can also filter traffi
c by packet attribute or state.
An Internet firewall cannot prevent individual users with modems from
network. By doing so they bypass the firewall altogether. Employee misconduct or carelessness
cannot be controlled by firewall
accounts must be strictly enforced. These are management issues that should be raised during
the planning of any security policy, but that cannot be solved with Internet firewalls alone.
There are three types of firewall:
In packet filtering, only the protocol and the address information of each packet is examined. Its
contents and context (its relation to other packets and to the intended application) are
The firewall pays no attention to applications on the host or local network and it "knows" nothing
about the sources of incoming data. Filtering consists of examining incoming or outgoing packets
and allowing or disallowing their transmission or a
rules. Network Address Translation (NAT) routers offer the advantages of packet filtering firewalls
but can also hide the IP addresses of computers behind the firewall, and offer a level of
circuit-based filtering.
Circuit Gateway
Also called a "Circuit Level Gateway," this is a firewall approach that validates connections before
allowing data to be exchanged. What this means is that the firewall doesn't simply allow or
disallow packets but also determines wh
according to configurable rules, then opens a session and permits traffic only from the allowed
source and possibly only for a limited period of time.
The Application Level Gateway acts
with the remote system in their behalf. This can render a computer behind the firewall all but
invisible to the remote system. It can allow or disallow traffic according to very specific rules, for
instance permitting some commands to a server but not others, limiting file access to certain types,
varying rules according to authenticated users and so forth. This type of firewall may also perform
very detailed logging of traffic and monitoring of eve
instructed to sound alarms or notify an operator under defined conditions. Application
gateways are generally regarded as the most secure type of firewall. They certainly have the most
sophisticated capabilities.
and one for the network it is exposed to. A
see if it meets certain criteria. If it
upon the protocol used, for example HTTP, ftp or telnet.
s. Policies involving the use and misuse of passwords and user
cceptance on the basis of a set of configurable
ether the connection between both ends is valid
as a proxy for applications, performing all data exchanges
nts on the host system, and can often be

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Denial of service (DoS) attacks typically come in two flavors: resource starvation and resource
overload. DoS attacks can occur when there is a legitimate demand for a resource that is greater
than the supply (i.e. too many w
vulnerabilities or system mis
a malicious denial of service and simple system overload is the requirement of an individual with
alicious intent (attacker) using or attempting to use resources specifically to deny those
resources to other users.
Ping of death-
On the Internet, ping of death is a kind of denial of service (DoS) attack caused by
an attacker deliberately sending an IP packet larger than the 65,536 bytes allowed by the IP
protocol. One of the features of TCP/IP is fragmentation; it allows a single
down into smaller segments. Attackers began to take advantage of that feature when they found
that a packet broken down into fragments could add up to more than the allowed 65,536 bytes.
Many operating systems didn't know what to do
froze, crashed, or rebooted. Other known variants of the ping of death include teardrop, bonk and
The attacker sends TCP SYN packet which start connections very fast, leaving the
iting to complete a huge number of connections, causing it to run out of resources and
dropping legitimate connections. A new defense against this is the “SYN cookies”. Each side of a
connection has its own sequence number. In response to a SYN, the attack
special sequence number that is a “cookie” of the connection then forgets everything it knows
about the connection. It can then recreate the forgotten information about the connection where
the next packets come in from a legitimate co
The attacker transmits a volume of ICMP request packets to cause all CPU
resources to be consumed serving the phony requests.
The attacker transmits a volume of requests for UDP diagnostic services which cause
sources to be consumed serving the phony requests.
The attacker attempts to slow your network down by sending a packet with identical
source and destination addresses originating from your network.
Where the source address of a broadcast ping is forged so that a huge number of
machines respond back to victim indicated by the address, overloading it.
A perpetrator sends a large amount of UDP echo packets at IP broadcast
l of it having a spoofed source address of a victim.
IP Spoofing is a method of masking the identity of an intrusion by making it appeared
that the traffic came from a different computer. This is used by intruders to keep their anonymity
can be used in a Denial of Service attack.
eb requests to an already overloaded web server). Software
can also cause DoS situations. The difference between
when they received an oversized packet, so they

SMARTLINK
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VLAN (Virtual Local Area Network)
Virtual LAN (VLAN) is defined as a group of devices on one or more LANs that are configured so
that they can communicate as if they were attached to the same wire, when in fact
on a number of different LAN segments. Because VLAN is based on logical instead of physical
connections, it is extremely flexible.
The IEEE 802.1Q defines the operation of VLAN bridges that permit the definition, operation, and
tion of VLAN topologies within a bridged LAN infrastructure. VLAN architecture benefits
Network tuning and simplification of software configurations
Physical topology independence
As DSL (over ATM) links are deployed more and more extensively and popularly, it is rising
progressively to implement VLAN (VLAN
We discuss the implementation of VLAN
spreads over both the COE and CPE sides, where there is no layer 3 routing involved.
The unit supports up to 8 active VLANs with shared VLAN learning (SVL) bridge out of
VLANs specified in IEEE 802.1Q.
Each port always belongs to a default VLAN with its port VID (PVID) as an untagged
member. Also, a port can belong to multiple VLANs and be tagged members of these
A port must not be a tagged member of its default VLA
PVID of the ingress port.
If the packet is tagged with non
The look up process starts with VLAN look up to determine w
VID is not valid, the packet will be dropped and its address will not be learned. If the VID is
valid, the VID, destination address, and source address lookups are performed.
The VID and destination address lookup determines
packet will be broadcasted to all members of the VLAN, except the ingress port.
Frames are sent out tagged or untagged depend on if the egress port is a tagged or
untagged member of the VLAN that frames belong.
D and source address look up fails, the source address will be learned.
An untagged frame or a priority
which it belongs. Such frames are classified as belonging to a parti
parameters associated with the receiving port. Also, priority tagged frames, which, by definition,
carry no VLAN identification information, are treated the same as untagged frames.
tagged frame carries an explicit identification
carries a tag header that carries a non
68 octets. Such a frame is classified as belonging to a particular VLAN based on the value of the
PVC) over DSL links and, hence, it is possible to be a
PVC only for bridge mode operation, i.e., the VLAN
VID tagged packet is received, it will be assigned with the default
null VID, the VID in the tag will be used.
hether the VID is valid. If the
the forwarding ports. If it fails, the
tagged frame does not carry any identification of the VLAN to
of the VLAN to which it belongs; i.e., it
null VID. This results in a minimum tagged frame length of

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uded in the tag header. The presence of the tag header carrying a non
means that some other device, either the originator of the frame or a VLAN
mapped this frame into a VLAN and has inserted the appropriate VID.
igure shows the difference between a untagged frame and VLAN tagged frame,
where the Tag Protocol Identifier (TPID) is of 0x8100 and it identifies the frame as a tagged frame.
The Tag Control Information (TCI) consists of the following elements: 1) User pr
tagged frame to carry user priority information across bridged LANs in which individual LAN
segments may be unable to signal priority information (e.g., 802.3/Ethernet segments). 2) The
Canonical Format Indicator (CFI) is used to signal t
Information Field (RIF) field, and, in combination with the Non
carried in the RIF, to signal the bit order of address information carried in the encapsulated frame.
identifies the VLAN to which the frame belongs.
he presence or absence of a Routing
canonical Format Indicator (NCFI)

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Getting to know about the router
This section will introduce
The front panel contains LEDs which show the status of the
Note: LAN port status is indicated on the back of the device.
Description
SHDSL self test
SHDSL line connection is dropped
SHDSL line connection is established
Transmit or received data over SHDSL link

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The rear panel of SHDSL router is where all of the connections are made.
Power adaptor inlet: Input voltage 12VDC
G.SHDSL interface for WAN port (RJ
The reset button can be used only in one of two ways.
When you want to change its configuration but you forget the user name or password,
Press the Reset Button a while with a paper clip or sharp penc
Button will cause the product
If the product is having problems connecting to the Internet and you want to configure it
again clearing all configurations, press the Reset But
Pressing the Reset Button will cause the produc
losing all of yours configuration.
SA-PAM-SAN-ATM-4ETH-FW-4W
Connectors Description
232C (DB9) for system configuration and maintenance
loading the factory default setting and losing all of yours
ton with a paper clip or sharp
t loading the factory default

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Pinout
Console Port DB9 pinout:
1 No connection
2 RxD (O)
3 TxD (I)
4 No connection
5 GND
6 No connection
7 CTS (O)
8 RTS (I)
9 No connection
1 No connection
2 No connection
Loop B (4 wire support only)
7 No connection
8 No connection

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Configuration to the router
This guide is designed to lead users through Web Configuration of G.shdsl Router in the easiest
and quickest way possible. Please follow the
Note: There are three methods to configure the router: serial console, Telnet and Web Browser.
Only one configuration application is used to setup the Router at any given time. Users
have to choose one method to configure it.
For Web configuration, you can skip step
For Serial Console Configuration, you can skip step 1 and 3.
Step 1: Check the Ethernet Adapter in PC or NB
Ethernet Adapter had been installed in PC or NB used for configuration of the
router. TCP/IP protocol is necessary for web configuration, so please check the TCP/IP protocol
whether it has been installed.
Step 2: Check the Terminal Access Program
Serial Console and Telnet Configuration, users need to setup the terminal access program
with VT100 terminal emulation.
Step 3: Check the Web Browser in PC or NB
According to the Web Configuration, the PC or NB need to install Web Browser, IE or Netscap
Note: Suggest to use IE5.0, Netscape 6.0 or above and 800x600 resolutions or above.
Step 4: Determine Connection Setting
Users need to know the Internet Protocol supplied by your Service Provider and determine the
mode of setting.
RFC1483
RFC1577
RFC2364
RFC2516
The different protocols are needed to setup the difference WAN parameters. After
protocol provided by your ISP, you have to setup the right protocol.
Step 5: Install the SHDSL Router
To avoid possible damage to this Router, do not turn on the router before Hardware Installation.
Connect the power adapter to the port
Connect the Ethernet cable.
router is directly connected to PC or NB, the Ethernet cable has to be use
router is connected to hub or s
sensing. If yes, both cross over and none cross over Ethernet able are suitable. If not,
only pass through Ethernet cable could be used.
cable to the product and the other side of
Turn on the PC or NB which is used for configuration the Router.
Protocol Selection
Ethernet over ATM
Classical Internet Protocol over ATM
Point-to-Point Protocol over ATM
Point-to-Point Protocol over Ethernet
IN on the rear panel of the product.
witch, be sure that the hub or

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Configuration via Web Browser
Using Microsoft Windows 2000 and XP: click the

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In the Configuration window, select the
network card and then click
Choose IP address tab. Select
The window will ask you to restart the PC. Click
protocol line that has been associated with your
Obtain IP address automatically. Click OK

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After rebooting your PC, open IE or Netscape Browser to connect the Router. Type
http://192.168.0.1
The default
Router is 192.168.0.1 and 255.255.255.0. Because
the router acts as DHCP server in your network,
the router will automatically assign IP address for
PC or NB in the network.
Type User Name root
The default user name and password are both
them after configuration.
Note: After
changing the User Name and
. For the system security, suggest to change
Password, strongly recommend

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Setup contains LAN, WAN, Bridge and Route operation mode. User can use it to
completely setup the router. After successfully completing it, you can access Internet. This is the
easiest and possible way to setup the router.
Note: The advanced functions
advanced function will affect the
should be used from qualified users only.
system performance or even create

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Before configuration the router in bridge mode
VPI:
VCI:
Encapsulation:
Gateway:
Host Name:
Side to setup Bridging mode of the Router and then click Next for the next
This product can be setup two SHDSL mode: CO, Central Office, and CPE, Customer Premises
Equipment. For connection with DSLAM, the SHDSL mode is CPE. For LAN to LAN co
one side must be Co and the other side must be CPE.
LAN Parameters
Enter IP: 192.168.0.1
Enter Subnet Mask:
The Gateway IP is provided by ISP.
Some of the ISP requires the host nam
identification. You may check with ISP to see if
your Internet service has been configured with a
host name. In most cases, this field can be
ignored.
WAN1 Parameters
Enter VPI: 0
Enter VCI: 32
Click LLC
Click Next.
check with your ISP about these information.

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The screen will prompt the new configured parameters. Check the parameters and
The router will reboot with the new setting or
to configure another parameters.

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Routing mode contains DHCP server, DHCP client, DHCP
and Ethernet and IP over ATM and Ethernet over ATM. You have to clarify which Internet protocol
is provided by ISP.
Click ROUTE and CPE
This product can be setup two SHDSL mode: CO, Central Of
Equipment. For connection with DSLAM, the SHDSL mode is CPE. For LAN to LAN connection,
one side must be Co and the other side must be CPE.
Dynamic Host Configuration Protocol (DHCP) is a communication proto
administrators to manage centrally and automate the assignment of Internet Protocol (IP)
addresses in an organization's network. Using the Internet Protocol, each machine that can
connect to the Internet needs a unique IP address. Whe
users with a connection to the Internet, an IP address must be assigned to each machine
Without DHCP, the IP address must be entered manually at each computer. If computers move to
location in another part of the network, a new IP address must be entered. DHCP lets a
network administrator to supervise and distribute IP addresses from a central point and
automatically sends a new IP address when a computer is plugged into a different
network. If the DHCP server is Enable, you have to setup the following parameters for processing
The embedded DHCP server assigns network configuration information at most 253 users
accessing the Internet in the same time.
IP type: Fixed
IP Address: 192.168.0.1
Subnet Mask:
Some of the ISP requires the host name as identification. You may check with ISP to see if your
Internet service has been configured with a host name. In most cases, this
The default setup is Enable DHCP server. If you want to turn off the DHCP service, choose Disable.
fice, and CPE, Customer Premises
n an organization sets up its computer

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For example: If the LAN IP address is 192.168.0.1, the IP range of LAN is 192.168.0.2 to
. The DHCP server assigns the IP form Start IP Address to End IP Address. The legal
IP address range is form 0 to 255, but 0 and 255 are reserved for broadcast so the legal IP
address range is from 1 to 254. On the other hand, you cannot assign an IP great
less then 1. Lease time 72 hours indicates that the DHCP server will reassign IP information in
DNS Server: Your ISP will provide at least one Domain Name Service Server IP. You can type the
router IP in this field. The
router will act as DNS server relay function.

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You may assign fixed IP addresses to some devices while using DHCP, provided that the fixed IP
address are not within the range used by the DHCP server.
to setup WAN1 parameters.
Some of the ISP provides DHCP server service by which the PC in LAN can access IP information
automatically. To setup the DHCP client mode, follow the procedure.
LAN IP Type: Dynamic
Click Next
to setup WAN1 parameters.
DHCP relay
If you have a DHCP
server in LAN and you want to use it for DHCP services, the product provides
CP relay function to meet your
IP Type: Fixed
IP Address: 192.168.0.1
Subnet Mask:
Some of the ISP requires the host name as
Internet service has been configured with a host name. In most cases, this field can be ignored.
to setup DHCP server parameter.
identification. You may check with ISP to see if your

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Enter DHCP server IP address i

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PPPoE or PPPoA
PPPoA (point-to-
point protocol over ATM) and PPPoE (point
authentication and connection protocols used by many service providers for broadband Internet
are specifications for connecting multiple computer users on an Ethernet local area
network to a remote site through common customer premises equipment, which is the telephone
company's term for a modem and similar devices. PPPoE and PPPoA can be used to o
building. Users share a common Digital Subscriber Line (DSL), cable modem, or wireless
connection to the Internet. PPPoE and PPPoA combine the Point
commonly used in dialup connections, with the Ethernet protocol or ATM pr
multiple users in a local area network. The PPP protocol information is encapsulated within an
Ethernet frame or ATM frame.
VPI:
VCI:
Encapsulation:
User Name:
Password:
DNS Server:
Host Name:
Key in the WAN1 parameters:
VPI: 0
VCI: 32
AAL5 Encap: LLC
Protocol: PPPoA + NAT or
to setup User name and password.
For more understanding about NAT, review NAT/DMZ.
point protocol over Ethernet) are
the information below with your ISP.

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Type the ISP1 parameters.
Username: test
Password: test
Password Confirm: test
Your ISP will provide the user name and password.
You want your Internet connection to remain on at all time, enter 0 in the Idle Time field.
There are two IP types, Dynamic and Static, which you
It means that ISP PPP server will provide IP information including dynamic IP address when
SHDSL connection is established. On the other hand, you do not need to type the IP address of
WAN1. Some of the ISP will p
IP Type: Fixed
IP Address: 192.168.1.1
Click Next.
Note: For
your safety, the password will prompt a
The screen will prompt the parameters that will be written in EPROM. Check the
Press Restart to restart the router working with new parameters or press continue to setup another
can setup. The default IP type is Dynamic.
rovide fixed IP address over PPP. For fixed IP address:

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IPoA or EoA
Before your configure
VPI:
VCI:
Encapsulation:
IP Address:
Subnet Mask:
Gateway:
DNS Server:
Host Name: (if app
Type the Wan Parameters;
VPI: 0
VCI: 33
AAL5 Encap: LLC
Protocol: IPoA , EoA , IPoA
to setup the IP parameters.
For more understanding about NAT, review NAT/DMZ.
IP Address: 10.1.2.1
It is router IP add
ress seem from Internet. Your ISP will provide it and you need to specify here.
This is the router subnet mask seen by external users on Internet. Your ISP will provide it to you.
Your ISP will provide you the
Your ISP will provide at least one DNS (Domain Name System) Server IP address.
the information below with your ISP.

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The screen will prompt the parameters that will be written in EPROM. Check the parameters before

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Press Restart to restart the router working with new parameters or press continue to setup another

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Advanced Setup SHDSL router
Advanced setup contains SHDSL, WAN, Bridge, Route, NAT/DMZ, Virtual server and firewall
You can setup the Annex type, data rate and SNR margin for SHDSL parameters in SHDSL.
Annex Type: There are two Annex types, Annex A (ANSI) and Annex B (ETSI), in SHDSL. Check
Data Rate: you can setup the SHDSL data r
ate in the multiple of 64kbps. For adaptive mode, you

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have to setup n=0. The router will adapt the data rate according to the line status.
SHDSL SNR margin: the margin range is from 0 to 10.

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SNR margin is an index of line connection. You can see the actual SNR margin in STATUS SHDSL.
The larger SNR margin, the better line connection.
If you set SNR margin in the field as 2, the SHDSL connection will drop and reconnect when the
lower than 2. On the other hand, the device will reduce the line rate and reconnect
for better line connection.
The screen will prompt the parameters that will be written in EPROM. Check the parameters before
writing in EPROM.
Press Restart to restart
the router working with new parameters or press continue to setup another

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Advanced Setup. SHDSL.bis router
You can setup the Annex type, data rate and SNR margin for SHDSL.bis parameters in
SHDSL.bis.
Click
SHDSL.bis
Annex Type: There are
foure Annex types, Annex A (ANSI), Annex B (ETSI), AnnexAF and Annex
BG in SHDSL.bis. Check with your ISP about it.
TCPAM Type: the default option is Auto. You may assign the different type manually by click the

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Data Rate (2W): you can setup the SHDSL.bis data rate in the multiple of 64kbps.
The default data rate is 5696Kbps (n=89).
TCPAM32 ; data rate is 768Kbps ~ 5696Kbps (Nx64kbps, N=12~89)
TCPAM16 ; data rate is 192Kbps ~ 3840Kbps
TCPAM16 ; 192Kbps ~ 2304Kbps (Nx 64kbps, N=3~36)
For adaptive mode, you have to setup n=0. The router will adapt the data rate according to the line

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For two-pair mode
Link Type.
Please select the desired
operation mode of the router.
wire mode, second pair is d
wire mode. If one of two pairs fails, all link breaks
wire mode. Two pairs works s
goes through the other pair.
wire mode. Only one pair works, another pair is in standby. When one
pair fails, fraffic goes through the other pair.
wire mode. Each pair is connected to two d
be or may not be in same location
: you can setup the SHDSL.bis data rate in the multiple of 128kbps.
The default data rate is 11392Kbps (n=89).
TCPAM32 ; data rate is 1536Kbps ~ 11392Kbps
TCPAM16 ; data rate is 384Kbps ~ 7680Kbps (Nx128kbps, N=3~60)
TCPAM16 ; 384Kbps ~ 4608Kbps (Nx 128kbps, N=3~36)
For adaptive mode, you have to setup n=0. The router will adapt the data rate according to the line
SNR margin is an index of line connection quality. You can see the actual SNR margin in STATUS
SHDSL.bis. The larger is SNR margin; the better is line connection quality.
If you set SNR margin in the field as 2, the SHDSL.bis connection will drop and
SNR margin is lower than 2. On the other hand, the device will reduce the line rate and reconnect
for better line connection quality.
The screen will prompt the parameters that will be written in EPROM. Check the parameters before
Press Restart to restart the router working with new parameters or press continue to setup another
Extended compatibility with Conexant IC
imultaneously. When one pair fails, traffic
ifferent devices, which may

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The SHDSL or SHDSL.bis router supports up to 8 PVCs. WAN 1 was configured via BASIC except
QoS. If you want to setup another
hand, you must apply two or more Internet Services with ISPs otherwise you do not need to setup
The WAN Number 1 will be the parameters setup in Basic Setup. If you want to setup another PVC
you can configure them in WAN 2 to WAN 8.
If WAN protocol is PPPoA or PPPoE with dynamic IP, leave the default WAN IP address and
Subnet Mask as default setting. The system will ingore the IP address and Subnet mask
deleating or leaving blank the items will cause system error.
If the WAN protocol is IPoA or EoA, leave the ISP parameters as default setting. The system will
ingore the information but deleating or leaving blank the items will cause system error.
Quality of Service): The Traffic Management Specification V4.0 defines ATM service
cataloges that describe both the traffic transmitted by users onto a network as well as the Quailty of
Service that the network need to provide for that traffic.
cified Bit Rate) is the simplest service provided by ATM networks. There is no
guarantee of anything. It is a primary service used for transferring Internet traffic over the ATM
CBR (Constant Bit Rate) is used by connections that requires a stati
avilable during the connection life time. This bandwidth is characterized by Peak Cell Rate. Based
on the PCR of the CBR traffic, specific cell slots are assigned for the VC in the schedule table. The
ATM always sends a signle
cell duting the CBR connection’s assigned cell slot.
VBR-rt (Varible Bit Rate real
over IP and video comferencing, that require tightly constrained delays and delay variation. VBR
is characterized by a peak cell rate (PCR), substained cell rate (SCR), and maximun burst rate
nrt (Varible Bit Rate non
PCR (Peak Cell Rate) in kbps: The maximum rate at which you expect to transmit data, voice and
PCR and MBS as a menas of reducing lantency, not increasing bandwidth. The
range of PCR is 64kbps to 2400kbps
SCR (Substained Cell Rate): The sustained rate at which you expect to transmit data, voice and
video. Consider SCR to be the true bandwidth of a
The range of SCR is 64kbps to 2400kbps.
MBS (Maximum Burst Size): The amount of time or the duration at which the router sends at PCR.
The range of MBS is 1 cell to 255 cells.
PVCs, 2 to 7, the parameters are setup in WAN. On the other
c amount of bandwidth that is
time) is intended for real-
time applications, such as compressed voice
term average traffic rate.

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The screen will prompt the parameters that will be written in EPROM. Check the parameters before
Press Restart to restart the router working with new parameters or press continue to setup another

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If your router is setup in bridge mode and you want to setup advanced filter function, you can use
BRIDGE menu to setup the filter function, blocking function.
Click Bridge to setup.
Press Add
to add the static bridge information.
filter the definate MAC address of LAN PC to access Internet, press
the filtering table. Key the MAC address in MAC address field and select Filter in LAN field.
If you want to filter the definate MAC address of WAN PC to access LAN, pr
the filtering table. Key the MAC address in MAC address field and select Filter in WAN field. For
example: if your VC is setup at WAN 1, select WAN 1 Filter.
The screen will prompt the parameters that will be written

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to restart the router working with new parameters or press

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Virtual LAN (VLAN) is defined as a group of devices on one or more LANs that are
that they can communicate as if they were attached to the same wire, when in fact they are located
on a number of different LAN segments. Because VLAN is based on logical instead of physical
connections, it is extremely flexible.
The product support two types of VLAN, 802.1Q and Port
For setting 802.1Q VLAN click the 802.1Q Tag
VID: Virtual LAN ID. It is
an definite number of ID which number is from 1 to 4094.
PVID: Port VID which is an untagged member of default VLAN.
Link Type: Access means the port can receive or send untagged packets.
Link Type: Trunk means that the prot can receive or send tagged
Link Type of the WAN is assigned automatically via which mode of the product is configured. If
the product works in bridge mode, the Link type of WAN will be Trunk, tagged port, and you can
assign any PVID to WAN except 0 and leaving blank.
Based. User can configure one of them

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the product works under routing mode, the Link Type of WAN will be Access mode,
Based VLANs are VLANs where the packet forwarding decision is based on the destination
MAC address and its associated port.
This page or function let user to configure the media type of Ethernet
Click ETHERNET to configure Ethernet.
Here are several options:

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If the Router is connected to more than one network,
between them. A static route is a pre
reach a specific host or network.
With Dynamic Routing, you can enable the Router to automatically adjust to phys
the network’s layout. The Router, using the RIP protocol, determines the network packets’ route
based on the fewest number of hops between the source and the destination. The RIP protocol
regularly broadcasts routing information to other ro
to modify the routing information.
To modify the RIP (Routing information protocol) Parameters:
RIP Mode: Enable
Auto RIP Summary: Enable
Press Modify
it may be necessary to set up a static route
determined pathway that network information must travel to

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RIP Mode: this parameter determines how the product handle
RIP allows it to exchange routing information with other router. If set to Disable, the gateway does
not participate in any RIP exchange with other router. If set Enable, the router broadcasts the
uter on the LAN and incoporates RIP broadcast by other routers into it’s
routing table. If set silent, the router does not broadcast the routing table, but it accepts RIP
broadcast packets that it receives.
RIP (Routing information protocol).

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RIP Version: It determines the format an
RIP v1: it only sends RIP v1 messages only.
RIP v2: it send RIP v2 messages in multicast and broadcast format.
d broadcasting method of any RIP transmissions by the

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None: for RIP, there is no need of authentication
Password: the RIP is protected by password, authentication code.
MD5: The RIP will be decoded by MD5 than protected by password, authentication code.
Poison Reserve is for the purpose of promptly broadcast or multicast the RIP while the route is
changed. (ex shuting down one of the routers in routing table)
Enable: the gateway will actively broadcast or multicast the information.
Disable: the gateway will not broadcast or multicast the information.
After modifying the RIP parameters, press
The screen will prompt the modified parameter. Check the parameters and perss
the router or press Continue
to setup another parameters.

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NAT (Network Address Translation) is the translation of an Internet Protocol address
used within one network to a different IP address known within another network. One network is
designated the inside network and the other is the outside. Typically, a company maps its local
inside network addresses to one or more global outsi
addresses of incoming packets back into local IP addresses. This ensure security since each
outgoing or incoming request must go through a translation process, that also offers the
opportunity to qualify or authent
conserves on the number of global IP addresses that a company needs and lets the company to
use a single IP address of its communication in the Internet world.
DMZ (demilitarized zone) is a com
a company private network and the outside public network. It prevents outside users from getting
direct access to a server that has company private data.
In a typical DMZ configuration for an enterprise, a separate computer or host receives requests
from users within the private network to access via Web sites or other companies accessible on the
public network. The DMZ host then initiates sessions for thes
However, the DMZ host is not able to initiate a session back into the private network. It can only
forward packets that have already been requested.
Users of the public network outside the company can access only the DMZ
typically also have the company’s Web pages so these could serve the outside world. However, the
DMZ provides access to no other company data. In the event that an outside user penetrated the
DMZ host’s security, the Web pages might be c
be exposed.
Press NAT/DMZ
de IP addresses and reverse the global IP
icate the request or match it to a previous request. NAT also
puter host or small network inserted as a “neutral zone” between
e requests to the public network.
orrupted, but no other company information would

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If you want to enable the NAT/DMZ functions, click Enable. Enable the DMZ host Function is used
the IP address assigned to the WAN for enabling DMZ fu
DMZ: Some users who have two or more global IP addresses assigned by ISP can be used
the multi DMZ. The table is for the mapping of global IP address and virtual IP address.
nction for the virtual IP address.

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NAT: Some of the virtual IP a
of the global IP addresses (eg: 69.210.1.9 and 69.210.1.10). The Multi
Virtual Start IP Address: 192.168.0.10
Global Start IP Address: 69.210.1.9
Count: 2
Press Finish to continue.
The screen will prompt the parameters that will be written in EPROM. Check the parameters before
configure another parameter.
ddresses (eg: 192.168.0.10 ~ 192.168.0.50) collectively use two
NAT table will be setup as;
to restart the router working with new parameters or

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For example: Specific ports on the WAN interface are re
only 69.210.1.8 (e.g., assigned to WAN from ISP) is visible to the Internet, but does not actually
have any services (other than NAT of course) run
Request with TCP made to 69.210.1.8:80 are remapped to the server 1 on 192.168.0.2:80 for
working days from Monday to Friday 8 AM to 6PM, other requests with UDP made to 69.210.1.8:25
er 2 on 192.168.0.3:25 and always on.
You can setup the router as Index 1, protocol TCP, interface WAN1, service name test1, private IP
192.168.0.2, private port 80, public port 80, schedule from Day Monday to Friday and time 8:0 to
ocol UDP, interface WAN1, service name test2, private IP 192.168.0.3,
private port 25, public port 25, schedule always.
to configure the parameters.
Press Modify for modify 1.
mapped to services inside the LAN. As
ning on gateway, it is said to be a virtual server.

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Type the necessary parameters then click
to restart the router or press
A firewall is a set of related programs that protects the resources of a private network from other
networks. It is helpful to users that allow preventing hackers
This level only enables the NAT firewall and the remote management security. The NAT firewall will
take effect if NAT function is enabled. The remote management security is default to block any
side connection to the device. Non
management connection except those IPs specified in the pool.
Press Finish to finish setting of firewall
The screen will prompt the parameters, which will be written in
to setup another function.
to access its own private data
empty legal IP pool in ADMIN will block all remote
EPROM. Check the parameters.

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Press restart to restart the router or press continue to setup another function.
This level enables basic firewall security, all DoS protection, and the SPI filter function.

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The screen will prompt the parameters, which will be written in EPROM. Check the parameters.

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Press restart to restart the router or press Continue to setup another function.

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User can determine the security level for
configuring the DoS protection and defining an extra packet filter with higher priority than the
default SPI filter. Note that, an improper filter policy may degrade the capability of the firewall
ven block the normal network traffic.
special purpose, environment, and applications by

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Click Advanced Firewall Security and then press Finish.
A SYN flood attack attempts to slow your network by requesting new connections but not
completing the process to open the connection. Once the buffer
full a server will not accept any more connections and will be unresponsive.
ICMP Flood: A sender transmits a volume of ICMP request packets to cause all CPU resources to
be consumed serving the phony requests.
A sender transmits a volume of requests for UDP diagnostic services which cause all
CPU resources to be consumed serving the phony requests.
A ping of death attack attempts to crash your system by sending a fragmented packet, when
than the maximum allowable size. Other known variants of the ping of death
include teardrop, bonk and nestea.
A land attack is an attempt to slow your network down by sending a packet with identical source
and destination addresses originating from your
IP Spoofing is a method of masking the identity of an intrusion by making it appeared that the traffic
came from a different computer. This is used by intruders to keep their anonymity and can be used
in a Denial of Service attack.
attack involves two systems. The attacker sends a packet containing a ICMP echo request
(ping) to the network address of one system. This system is known as the amplifier. The return
address of the ping has been faked (spoofed) to appear to come from a mac
network (the victim). The victim is then flooded with responses to the ping. As many responses are
generated for only one attack, the attacker is able use many amplifiers on the same victim.
IP Spoofing: Falsify the IP header information t
for these pending connections is
o deceive the destination host.

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Traditional firewall are stateless meaning they have no memory of the connections of data or
packets that pass through them. Such IP filtering firewalls simply examine header information in
each packet and attempt to match
prescribe action is taken. If no match is found, the packet is accepted into the network, or dropped,
depending on the firewall configuration.
A stateful firewall maintains a memory of each c
firewall records the context of connections during each session, continuously updating state
information in dynamic tables. With this information, stateful firewalls inspect each connection
terface of the firewall, testing the validity of data packets throughout each
session. As data arrives, it is checked against the state tables and if the data is part of the session,
it is accepted. Stateful firewalls enable a more intelligent, flexible an
security, while defeating most intrusion methods that exploit state
If you want to configure the Packet Filtering Parameters, choose Enable and press Add.
Select the protocol and configure the
If you want to ban all of the protocol from the IP (e.g.: 200.1.1.1) to access the all PCs (e.g.:
192.168.0.2 ~ 192.168.0.50) in the LAN, key in the parameter as;
it to a set of define rule. If the firewall finds a match, the
onnection and data passing through it. Stateful
d robust approach to network
less IP filtering firewalls.

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Direction: INBOUND (INBOUND is from WAN to LAN, and OUTBOUND is L
Description: Hacker
Src. IP Address: 200.1.1.1
Dest. IP Address: 192.168.0.2
The screen will prompt the configured parameters. Check the
Click Restart to restart the gateway or Continue to configure other parameters.
Filtering rule will be configured as follow
Filtering Rule for SMTP connection
External Internal 25
Internal External
Internal External 25
External Internal
Action (Rule)
Permit (A)
Permit (B)

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SMTP Server
172.16.1.1:25
Packet Direction
SMTP Client
172.16.1.1:1357
Packet Direction
6
171.16.3.4:6000
X11 Server
Update Filtering Rule
Index Protocol Direction
Filtering Result
Index Protocol Direction
Destination Protocol Dest.
172.16.1.1 TCP 1357
Internet
3
4
10.1.2.3 TCP 5150
Internet
5
External Internal >1023
Internal External 25
Internal External >1023
External Internal 25
192.168.3.4 171.16.1.1 1234
171.16.1.1 192.168.3.4 25
171.16.1.1 192.168.3.4 1357
192.168.3.4 171.16.1.1 25
Action (Rule)
Permit (C)
Permit (D)
Action (Rule)
Deny (E)
Deny (E)
Attacker
Dest. Port
25
>1023
25
>1023
Any
Dest. Port
25
1234
25
1357
6000
5150

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The rules order affects the filtering result. The filtering process will proceed from top to bottom,
changing the order as the different
Rule Source Address
A 10.0.0.0
B 10.1.99.0
C Any
Where “0” at the last eight bits indicates “from 1 to 254”, “0” at any eight bits preceding “0”, “0.0”
“0.0.0” indicates “from 1 to 254”. On the other hand, “0” and all “0” successive with “0”
When the rule is ordered as ABC.
1 10.1.99.1
2 10.1.99.1
3 10.1.1.1
4 10.1.1.1
5 192.168.3.4
The rule order will permit 10.1.99.1 to access 172.16.6.1.
When the rule is ordered as BAC.
1 10.1.99.1
2 10.1.99.1
3 10.1.1.1
4 10.1.1.1
5 192.168.3.4
The rule order will deny 10.1.99.1 to access 172.6.6.1.
result of filtering.
Destination Address Action
172.16.6.0 Permit
172.16.0.0 Deny
Any Deny

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IP QoS
IP QoS is a good function
to decide which PCs can get the priorities to pass though router once if
the bandwidth is exhausted or fully saturated.
at item Trigger IP QoS Service in General IP QoS Parameter, which turn on this
function if you want to enable it.
in the bottom of web page to begin a new entry in Policy table.
Set the policy to action:
Description: A brief statement describe this policy
Local IP: type IP address of local host in prioritized session.
Remote IP: type IP address of remote
Local Port: type the service port number of local host in prioritized session.
Remote Port: type the service port number of remote host in prioritized session.
Protocol: identify the transportation layer protocol type you wa
Precedence: type the session’s prioritized level you classify, “0” is lowest priority, “5” is highest
host in prioritized session.
nt to prioritize, ex: TCP or UDP. The

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This is an example for your reference,
192.168.1.60 is the highest priority to undergo
192.168.1.50 is the second high priority; 192.168.1.40 is the third high priority and so on.
the over full bandwidth situation.

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This session introduces security and simple network management protocol (SNMP) and time

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For system secutiry, suggest to change the default user name and password in the first setup
otherwise unauthorized persons can access the router and change the parameters.
There are three ways to configure the router, Web browser, telnet and ser
For greater security, change the Supervisor ID and password for the gateway. If you don’t set them,
all users on your network can be able to access the gateway using the default IP and Password
You can authorize five legal users to access the router via telnet or console. There are two UI
modes, menu driven mode and command mode to configure the router.
Legal address pool will setup the legal IP addresses from which authorized person can
the gateway. This is the more secure function for network administrator to setup the legal address
Configured 0.0.0.0 will allow all hosts on Internet or LAN to access the router.
Leaving blank of trust host list will cause bl
other hand, only PC in LAN can access the router.
If you type the excact IP address in the filed, only the host can access the router.
ocking all PC from WAN to access the router. On the

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The browser will prompt the
to restart the gateway working with the new parameters and press
setup other parameters.
SNMP
Simple Network Management Protocol (SNMP) provides for the exchange of m
network management client and a network management agent for remote management of network
nodes. These messages contain requests to get and set variables that exist in network nodes in
order to obtain statistics, set configuration paramet
communications can occur over the LAN or WAN connection.
The router can generate SNMP traps to indicate alarm conditions, and it relies on SNMP
community strings to implement SNMP security. This router support MIB I a
to configure the parameters.
In the table of current community pool, you can setup the access authority.
In the table of current trap host pool, you can setup the trap host.
to modify the community pool.
configured parameters and check it before writing into EPROM.
ers, and monitor network events. SNMP

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Access Right: Deny for deny all access
Access Right: Read for access read only
Access Right: Write for access read and write.
Community: it serves as password for access right.
After configuring the community pool, press
NMP rap is an informational message sent from an SNMP agent to a manager. Click Modify to
modify the trap host pool.
Version: select version for trap host (SNMP v1 or SNMP v2).
IP: type the trap host IP
Community: type the community password. The communit
y is setup in community pool.

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The browser will prompt the configured parameters and check it before writing into EPROM.
to restart the gateway working with the new parameters and press
setup other parameters.
Time Sync
Time synchronization is an essential element for any business that relies on an IT system. The
reason for this is that these systems all have clocks that are the source of time for files or
operations they handle. Wit
other or with the correct time and this can cause
fail, security to be compromised, virtual server works in wrong schedule.
There are two synchronization modes: Sample Network Time Protocol (SNTP) and
synchronization with PC. For synchronization with PC, select Sync with PC. The gateway will
synchronize the time with the connecting PC.
hout time synchronization, time on these systems varies with each
, firewall packet filtering schedule processes to

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SNTP is the acronym for Simple
Time Protocol (NTP) used to synchronize computer clocks in the Internet. SNTP can be used
when the ultimate performance of the full NTP implementation.
For SNTP, select SNTP v4.0.
Time Server: All of the time server around the world can be used but suggest to use the timeserver
Time Zone: you have to choose the right time zone.
Press Finish to finish the setup. The browser will prompt the configured parameters and
before writing into EPROM.
Network Time Protocol, which is an adaptation of the Network

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This section will describe the utility of the product including system information, load the factory
default configuration, upgrade the firmware logout and restart the gateway.
System Info
Click System Info
for review the information.
The browser will prompt the system information.
This configuration tool has three functions: load Factory Default, Restore Configuration and
Backup Configuration.
Press Config Tool.
Choose the function and th
Load Factory Default function: it will load the factory default parameters to the gateway.

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All of the settings will be changed to factory default. On the other hand you will lose all the
Configuration: Sometime the configuration will be crushed unintentionally.
Restore configuration will help you to recover the backup configuration easily.
Click Finish after selecting Restore Configuration.
Browse the route of backup file then press finish
Backup Configuration: After configuration, suggest using the function to backup your
router parameters in the PC.
Select the Backup Configuration and then press Finish.
backup the configuration.
You can upgrade the gateway using the upgrade function.
Browse the file and press OK button to upgrade. The system will reboot
To logout the router, press logout.
For restarting the router, click the
. The router will automatically restore the
ackup file named backup. Press Finish. The router will automatically

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MDS921AE-10BTS - MD
You can monitor the SHDSL or SHDSL.bis status including mode,
Performance information including SNR margin, atteunation and CRC error count.
LAN status will prompt the MAC address, IP address, Subnet mask and DHCP client table.
WAN status will display the WAN interface information.
can view the routing table in the status of route.
Interface status inculdes LAN and WAN statistics information.
Firewall status display DoS protection status and dropped packets statistics.

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MDS921AE-10BTS - MD
LAN connection with bridge Mode
CO side
Click Bridge and CO
Side to setup Bridging mode of the Router and then click
LAN Parameters
Enter IP: 192.168.0.1
Enter Subnet Mask:
Enter Gateway: 192.168.0.1
Enter Host Name: SOHO

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MDS921AE-10BTS - MD
WAN1 Parameters
Enter VPI: 0
Enter VCI: 32
Click LLC
Click Next
The screen will prompt the new configured parameters. Check the parameters and
The router will reboot with the new setting.
CPE Side
Click Bridge and CO
Side to setup Bridging mode of the Router and then click

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MDS921AE-10BTS - MD
LAN Parameters
Enter IP: 192.168.0.2
Enter Subnet Mask:
Enter Gateway: 192.168.0.2
Enter Host Name: SOHO
WAN1 Parameters
Enter VPI: 0
Enter VCI: 32
Click LLC
Click Next
The screen will prompt the new configured parameters. Check the parameters and
The router will reboot with the new setting.

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MDS921AE-10BTS - MD
LAN to LAN Connection with Routing Mode
CO side
Click ROUTE and CO Side
Type LAN parameters:
IP Address: 192.168.20.1
Subnet Mask:
DHCP Service: For more DHCP service, review DHCP Service.

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MDS921AE-10BTS - MD
Type the Wan Parameters;
VPI: 0
VCI: 32
AAL5 Encap: LLC
Protocol: IPoA , EoA , IPoA
Note: The Protocol used in CO and CPE have to be the same.
to setup the IP parameters.
For more understanding about NAT, review NAT/DMZ in page 19.

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MDS921AE-10BTS - MD
IP Address: 192.168.30.1
Subnet mask:
Gateway: 192.168.30.2
Click Next
The
screen will prompt the parameters that will be written in EPROM. Check the parameters before
Press Restart to restart the router working with new parameters or press continue to setup another
parameter.
CPE side
Click ROUTE and CPE

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MDS921AE-10BTS - MD
Type LAN parameters:
IP Address: 192.168.10.1
Subnet Mask:
DHCP Service: For more DHCP service, review DHCP Service.
Type the Wan Parameters;
VPI: 0
VCI: 32
AAL5 Encap: LLC
Protocol: IPoA , EoA , IPoA
Note: The Protocol used in CO and CPE have to be the same.
to setup the IP parameters.
For more understanding about NAT, review NAT/DMZ in page 19.

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MDS921AE-10BTS - MD
IP Address: 192.168.30.2
Subnet mask:
Gateway: 192.168.30.1
Click Next
The screen will prompt the parameters that will be written in EPROM. Check the parameters before
Press Restart to restart the router working with new parameters or press continue to setup another

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MDS921AE-10BTS - MD
Configuration via Serial Console or Telnet with Manu
Check the connectivity of the RS
your terminal access program with VT100 terminal emulation. Configure th
key until the login screen appears. When you see the login screen, you can
logon to Router.
Note: You have to use
User: admin
Password: *****
Note: The factory default user and passwords are both “admin”.
Supervisor password: root
Note: The factory default Supervisor passwords is “root”.
Make sure the correct Ethernet cable is used for connecting the LAN port of your computer to
ROUTER. The LAN LNK indicator on the front panel shall light if a correct cable is used. Starting
your Telnet client with VT100 terminal emulation and connecting
wait for the login screen appears. When you see the login screen, you can logon to Router.
User: admin
Password: *****
Note: The default IP address is 192.168.0.1
232 cable from your computer to the serial port of ROUTER. Start
key. Pressing other keys does not work.
to the management IP of Router,

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MDS921AE-10BTS - MD
Configuration via Serial Console or Telnet
For serial console and Telnet management, the
command line interface (CLI) and menu driven interface. The CLI mode provides users a simple
interface, which is better for working with script file. The menu drive
interface to general operations. The command syntax for CLI is the same as that of the menu
driven interface. The only difference is that the menu driven interface shows you all of available
commands for you to select. You do
time on typing the whole command line.
gives you an example of the menu driven interface. In the menu, you scroll
up/down by pressing key I
. For example, to show the system information, just logon to the
down the cursor by pressing key
submenu and select “system” command in this su
implements two operational interfaces:
n’t need to remember the command syntax and save your
K, select one command by key L, and go
back to a higher level of
twice and select “show” command by key
bmenu, then the system will show you the

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MDS921AE-10BTS - MD
From top to bottom, the window will be divided into four parts:
Menu field: Menu tree is prompted on this field. “
Configuring field: You will configure the parameters in this field.
parameters you can choose and
Operation command for help
The following table shows the parameters in
An item enclosed in brackets is required. If the item is shown in lower
case bold, it represents an object with special format. For example,
Two or more items enclosed in
bars means that you must choose exactly one of the items. If the item
is shown in lower case bold with leading capital letter, it is a command
An item enclosed in brackets is optional.
Two or more items enclosed in brackets and separated by vertical
bars means that you can choose one or none of the items.
Menu Driven Interface Commands
Before changing the configuration,
The operation list will be shown on the window.
Move to above field in the same level menu.
Move back to previous menu.
To choose another parameters.
To quit the configuring item.
menu three are as following figures. All of the configuration commands are placed in the
subdirectories of Enable protected by supervisor password. On the other hand, unauthorized user
cannot change any configurations but viewing the status and configurati
ping command to make sure the router is worked.
Note: Some commands could be present or not depending of firmware and hardware release.
” symbol indicates the cursor place.
indicates that there have submenu in the title.
the brackets.
Description
brackets and separated by vertical
is a command parameter in
familiarize yourself with the operations list in the following table.
Menu Driven Interface Commands
field in the same level menu.
on of the router and using

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MDS921AE-10BTS - MD
To setup the router, move the cursor “
appears, type the supervisor password. The default supervisor password is
----------------------------------------------------------------------
Message: Please input the following information.
Supervisor password: ****
----------------------------------------------------------------------
Note: The factory default Supervisor passwords is “root”.
In this sub menu, you can setup management features and upgrade software, backup the system
configuration and restore the sy
For any changes of configuration, you have to write the new configuration to EPROM and reboot
the router to work with new setting.
The screen will prompt as follow.
Show running system status
View system configuration
Update flash configuration
Packet internet groper command
Setup management features
The description of the commands are:
Modify command privilege. When you login via serial console or Telnet, the
router defaults to a program execution (read
configuration and write changes to nonvolatile RAM (NVRAM), you must
To configure the product, you have to use the setup command.
View the status of product.
Show the system and configuration of product.
Update flash configuration. After you have completed all necessary setting,
make sure to write the new configuration to NVRAM by “
reboot the system, or all of your changes will not take effect.
Reset and boot system. After you
sure to write the new configuration to NVRAM and reboot the system by
” command, or all of your changes will not take effect.
Packet internet groper command.
Upgrade software and backup and restore configuration are done via “
and press enter key. While the screen
stem configuration via utility tools.
only) privileges to you. To change
have completed all necessary setting, make
features in this command.

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MDS921AE-10BTS - MD
You can view running system status of SHDSL, WAN, route and interface via
Move cursor “ >> “ to status
Show WAN interface status
Show interface statistics status
The SHDSL status includes line rate, SNR margin, TX power, attenuation and
CRC error of the product, and SNR margin, attenuation and CRC error of remote
side. The product access remote side information via EOC (embedded
The SHDSL.bis status includes line rate, SNR margin, TX power, attenuation,
and CRC error of the product, and SNR margin, attenuation and CRC error of
remote side. The product access remote side information via EOC (embedded
WAN status shows the 8 PVC information which are configured.
You can see the routing table via route command.
The statistic status of WAN and LAN interface can be monitor by interface
urrent and history status of firewall are shown in this command.

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MDS921AE-10BTS - MD
You can view the system information, configuration and configuration in command script by
command.
Move cursor “ >> “ to show
Show all configuration in command script
The general information of the system will show in system command.
Config command can display detail configuration
Configuration information will prompt in command script.
For any changes of configuration, you must write the new configuration to EPROM using
command and reboot the router to take affect.
----------------------------------------------------------------------
Message: Please input the following information.
----------------------------------------------------------------------
Reboot
To reboot the router, use
----------------------------------------------------------------------
Message: Please input the following information.
----------------------------------------------------------------------
Ping command will be used to test the connection of router. Move cursor “
----------------------------------------------------------------------
Command: ping <ip> [1~65534|
Message: Please input the following information.
IP address <IP> : 10.0.0.1
Number of ping request packets to send (TAB select):
----------------------------------------------------------------------
There are 3 types of number of ping request packet to send, default, 1~65534 and
t continuous packet until you key in Ctrl+c to stop.
command. Move cursor to “ >> “ to write

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MDS921AE-10BTS - MD
You can modify the user profile, telnet access, SNMP (Sample Network Management Protocol),
supervisor information and SNTP (Simple Network Time Protocol) in
For configuration the parameters, move the cur
Change supervisor password
Configure time synchronization
User Profile
You can use user
command to clear, modify and list the user profile. You can setup at most five
users to access the router via console port or telnet in user profile table however users who have
the supervisor password can change the configuration
and press enter key.
>> clear
You can delete the user by number using
or add a new user to user profile.
To modify or add a new user, move the cursor to modify and press enter.
-------------------------------------------------------------------
Command: admin user modify <1~5> <more...>
Message: Please input the following information.
Legal access user profile number <1~5> :
----------------------------------------------------
The screen will prompt as follow.
There are two UI mode, command and menu mode, to setup the product. We will not discuss
command mode in this manual.
Security command can be configured sixteen legal IP address for telnet access and telnet port
of the router. Move the cursor “
command. If you do not make sure the number of
command is to modify an old user information

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MDS921AE-10BTS - MD
Move the cursor “ >> “ to
that there is no restriction of IP to access the ro
Configure telnet TCP port
Legal address IP address pool
Simple Network Management Protocol (SNMP) is the protocol not only governing network
management, but also the monitoring of network devices and their functions.
The router can generate SNMP traps to indicate alarm conditions, and it relies on SNMP
ity strings to implement SNMP security. This router support MIB I & II.
Move the cursor “ >> “ to
Configure community parameter
Configure trap host parameter
5 SNMP community entry can be configured in this
----------------------------------------------------------------------
Command: admin snmp community <1~5> <more...>
Message: Please input the following information.
Community entry number <1~5> :
----------------------------------------------------------------------
The screen will prompt as follow:
Show community configuration
5 SNMP trap entry can be configured in this system. Move the cursor to trap
----------------------------------------------------------------------
Command: admin snmp trap <1~5> <more...>
Message: Please input the following information.
Trap host entry number <1~5> :
-------------------------------------------
The screen will prompt as follow:
and press enter. The default legal address is 0.0.0.0. It means
system. Move the cursor to community and
---------------------------

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MDS921AE-10BTS - MD
Supervisor password and ID
The supervisor password and ID are the last door for security but the most important. Users who
access the router via web browser have to use the ID and password to configure the router and
users who access the router via telnet or console mode have to use
router. Suggest to change the ID and password after the first time of configuration, and save it. At
next time when you access to the router, you have to use the new password.
----------------------------------------------------------------------
Command: admin passwd <pass_conf>
Message: Please input the following information.
Input old Supervisor password:
Input new Supervisor password:
Re-type Supervisor passwo
----------------------------------------------------------------------
----------------------------------------------------------------------
Command: admin id <pass_conf>
Message: Please input the following information.
----------------------------------------------------------------------
Time synchronization is an essential element for any business that relies on an IT system. The
reason for this is that these systems all have clocks
operations they handle. Without time synchronization, time on these systems varies with each
other or with the correct time and this can cause
system log exposures with
There are two methods to synchronize time, synchronize with PC or SNTPv4. If you choose
synchronize with PC, the router will synchronize with PC. If you choose SNTPv4, the router will
use the protocol to synchronize with the time server. Sync
needs to configure service, time_server and time_zone. Synchronization with PC does not need to
configure the above parameters.
Move the cursor “ >> “ to
Select time synchronization
Configure GMT time zone offset
To configure SNTP v4 time synchronization, follow the below procedures.
move the cursor to method and press enter.
----------------------------------------------------------------------
Command: admin sntp method <
Message: Please input the following information.
SYNC method (Enter for default) <SyncWithPC> :
----------------------------------------------------------------------
the password to configure the
that are the source of time for files or
virtual server schedule processes to fail and
hronization with time server, SNTP v4,

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MDS921AE-10BTS - MD
Move the cursor to service and press enter.
----------------------------------------------------------------------
Command: admin sntp service <Disable|Enable>
Message: Please input the following information.
Active SNTP v4.0 service (Tab Select) <Enable> :
----------------------------------------------------------------------
Move the cursor to time_server1 and press enter.
----------------------------------------------------------------------
Command: admin sntp time_server1 <string>
the following information.
Time server address(Enter for default) <ntp
----------------------------------------------------------------------
You can configure three time server in this system.
Move the cursor to update_rate an
----------------------------------------------------------------------
Command: admin sntp update_rate <10~268435455>
Message: Please input the following information.
Update period (secs) (Enter for default) :
------------------------------------------------
Move the cursor to time_zone and configure where your router is placed. The easiest way to know
the time zone offset hour is from your PC clock. Double click the clock at the right corner of monitor
and check the time zone.
------------------------------
----------------------------------------
Command: admin sntp time_zone <
Message: Please input the following information.
GTM time zone offset (hours) (Enter for default) :
----------------------------------------------------------------------
Move the cursor to list and review the setting.
There are three utility tools, upgrade, backup and restore, embedded in the firmware. You can
update the new firmware via TFTP upgrade tools and backup the configuration via TFTP backup
ore the configuration via TFTP restore tool. For upgrade, TFTP server with the new
firmware will be supported by supplier but for backup and restore, you must have your own TFTP
server to backup and restore the file.
Move the cursor “ >> “ to
Backup system configuration
Restore system configuration
-2.vt.edu> : ntp-2.vt.edu

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MDS921AE-10BTS - MD
If you want to exit the system without saving, use
All of the setup parameters are located in the subdirectories of setup. Move the cursor “
setup and press enter.
>> mode
Switch system operation mode
Configure SHDSL parameters
Configure SHDSL.bis parameters
Configure WAN interface profile
Configure transparent bridging
Configure virtual LAN paramters
Configures Spanning Tree Protocol of the Router
Configure routing parameters
Configure LAN interface profile
Configure NAT/PAT parameters
Configure Firewall parameters
Configure IP QoS parameters of the router
Configure DHCP parameters
Configure DNS proxy parameters
Configure local host name
The product can act as routing mode or bridging mode. The default setting is routing mode. You
can change the system operation mode by using mode command. Move the cursor “
----------------------------------------------------------------------
Command: setup mode <Route|Bridge>
Message: Please input the following information.
System operation mode (TAB select) <Route>:
----------------------------------------------------------------------
You can setup the SHDSL parameters by the command
Configure SHDSL data rate
Configure SHDSL annex type
Clear current CRC error count
Configure SHDSL SNR margin
There are two types of SHDSL mode, STU
C customer premises equipment.
can setup the data rate by the multiple of 64Kbps where n is from 0 to 32. If you configure n is
0, the product will perform as adaptive mode.
There are two types of SHDSL Annex type, Annex
R means the terminal of central

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MDS921AE-10BTS - MD
Clear command can clear CRC error count.
ly, you cannot need to change SNR margin, which range is from 0 to 10. SNR margin is an
index of line connection. You can see the actual SNR margin in STATUS SHDSL. The larger SNR
margin, the better line connection. If you set SNR margin in the field as 2,
will drop and reconnect when the SNR margin is lower than 2. On the other hand, the device will
reduce the line rate and reconnect for better line connection.
You can setup the SHDSL.bis parameters by the command
shdsl.bis and press enter.
>> mode
Configure SHDSL.bis data rate
Configure SHDSL.bis annex type
Clear current CRC error count
Configure SHDSL.bis SNR margin
There are two types of SHDSL.bis mode, STU
C customer premise equipment.
Link type will be 2-wire or 4-
wire mode according to the product. 4
wire mode router can operate in Auto Fall Back, Standby or Multi
modes.
2-Wire (only for 4-
M-Pair
M-Pair (Conexant)
Auto Fall Back
You can setup the data rate by the multiple of 64Kbps where n is from 3 to 89
There are four types of SHDSL.bis Annex type, Annex
Clear command can clear CRC error count.
Generally, you cannot need to change SNR margin, which range is from 0 to 10. SNR margin is an
index of line connection.
You can see the actual SNR margin in STATUS SHDSL.bis. The larger is
SNR margin; the better is line connection quality. If you set SNR margin in the field as 2, the
SHDSL.bis connection will drop and reconnect when the SNR margin is lower than 2. On the ot
hand, the device will reduce the line rate and reconnect for better line connection.
R means the terminal of central
2-wire mode, second pair is disabled
4-
wire mode. If one of two pairs fails, all link breaks
Extended compatibility with Conexant IC
wire mode. Two pairs works simultaneously. When one pair fails,
traffic goes through the other pair.
4-
wire mode. Only one pair works, another pair is in standby.
raffic goes through the other pair.
wire mode. Each pair is connected to two different devices,
which may be or may not be in same location