Gateway 2701hgb Manual

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Glossary
A
Access Point. A device that transports data between a wireless network and a wired network. With the help 
of the system, a wireless base station is an example of an access point that acts between a wireless node 
and with other wired PCs and peripherals.
D
Default Gateway. A device that is placed between network segments (or “subnets”) to ensure that traffic is 
properly routed between different subnets. To communicate with a device on another network, users need 
to know the default gateway’s IP address.
DHCP (Dynamic Host Configuration Protocol). A TCP/IP protocol that allows servers to assign IP 
addresses dynamically to PCs and workstations. The PC or workstation “borrows” the IP address for a 
period of time, then the IP address returns to the DHCP ser ver for reassignment.
DMZ (Demilitarized Zone). A computer or small subnetwork that sits between a trusted internal network 
(such as a LAN), and an untrusted external network (such as the Internet). Typically, the DMZ contains 
devices accessible to Internet traffic, such as Web (HTTP) servers, FTP ser vers, SMTP (e-mail) servers and 
DNS servers.
DNS (Domain Name System). The DNS is the way that Internet domain names (such as www.2wire.com) 
are located and translated into IP addresses.
DSLAM (Digital Subscriber Line Access Multiplexer). A device found in telephone company central offices 
that takes a number of DSL subscriber lines and concentrates them onto a single ATM line.
E
Ethernet. A type of local area network that operates over twisted wire and cable at speeds of up to 10 
Mbps.
I
ICMP (Internet Control Message Protocol). ICMP suppor ts packets containing error, control, and 
informational messages. For example, the PING command uses ICMP to test an Internet connection. 
Although ICMP is generally harmless, there are some message types that should be dropped. Redirect (5), 
Alternate Host Address (6), and Router Advertisement (9) can be used to redirect traffic from your site. 
Echo (8), Timestamp (13), and Address Mask Request (17) can be used to obtain information on whether 
the host is up, the local time, and the address mask used on your network, respectively. ICMP messages 
are also sometimes used as par t of DOS attacks (such as flood ping or ping of death).
Invalid TCP flags. Combination of TCP flags (such as SYN/FIN) that signal a malicious attempt to get past 
the firewall.
IP (Internet Protocol). The standard signaling method used for all communication over the Internet. 
						

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127
IP Address. A numeric identifier for your computer. Just as the post office delivers mail to your home 
address, servers know to deliver data to your computer based on your IP address. IP addresses can be 
dynamic, meaning that your computer “borrows” the IP address for the necessar y timeframe, or they can be 
fixed, meaning that the number is permanently assigned to your computer.
L
LAN (Local Area Network). A network connecting a number of computers to each other or to a central 
ser ver so that the computers can share programs and files.
M
MAC (Media Access Control) Address. A hardware address that has been embedded into the network 
interface card (NIC) by its vendor to uniquely identify each node, or point of connection, of a network.
Map to Host Por t. When set (not left blank or set to 0), this value provides the mapping offset to the local 
computer. For example, if this value is set to 4000 and the range being opened is 100 to 108, the 
forwarded data to the first value in the range will be sent to 4000. Subsequent por ts will be mapped 
accordingly; 101 will be sent to 4001, 102 will be sent to 4002, etc.
MTU (maximum transmission unit). The largest size packet or frame, specified in octets (eight-bit bytes), 
that can be sent from a computer to the network. The Internets TCP uses the MTU to determine the 
maximum size of each packet in any transmission. If the MTU is too large, the packet may need to be 
retransmitted if it encounters a router that cant handle that large a packet. Too small an MTU size means 
relatively more header overhead and more acknowledgements that have to be sent and handled. Most 
computer operating systems provide a default MTU value that is suitable for most users. In general, 
Internet users should follow the advice of their Internet ser vice provider (ISP) about whether to change the 
default value and what to change it to.
N
NAT (Network Address Translation). Enables a LAN to use one set of IP addresses for internal traffic and a 
second set of IP addresses for external traffic. This feature is used by the system so an end user can have 
an internal computer network in their home, with all its computers using internal IP addresses, using only 
one routable IP address, which accesses the outside (Internet).
P
PAT (Por t Address Translation). Allows hosts on a LAN to communicate with the rest of a network (such as 
the Internet) without revealing their own private IP address. All outbound packets have their IP address 
translated to the router’s external IP address. Replies come back to the router, which then translates them 
back into the private IP address of the original host for final deliver y. 
PPP (Point-to-Point Protocol). A protocol that allows a computer to access the Internet using a dial-up 
phone line and a high-speed modem. This can be accomplished over Ethernet (PPPoE), or over 
Asynchronous Transfer Mode (ATM; PPPoA). 
						

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PPPoA (Point-to-Point Protocol over ATM). A specification for connecting multiple computer users on an 
Ethernet LAN to a remote site through common customer premises equipment (such as a modem). PPPoA 
combines the Point-to-Point Protocol (PPP), commonly used in dialup connections, with the ATM 
(Asynchronous Transfer Mode) protocol, which supports multiple users in a LAN. 
PPPoE (Point-to-Point Protocol over Ethernet). A specification for connecting multiple computer users on 
an Ethernet LAN to a remote site through common customer premises equipment (such as a modem). 
PPPoE combines the Point-to-Point Protocol (PPP), commonly used in dialup connections, with the Ethernet 
protocol, which suppor ts multiple users in a LAN.
Protocol Timeout. The amount of time (in seconds) during which a connection in the specified range 
remains open when there is no data transfer. After a connection has been established on a given por t, the 
sender and receiver usually determine when the session is finished and the connection is closed. However, 
if the connection is left open and data transfer stops, the system must eventually close the connection and 
reclaim the resources in order to protect your network. In some cases, the system might close the 
application during normal operation (for example, if there is a long pause between data transfer). If this is 
the case, lengthening the timeout may help. 
PVC (permanent virtual circuit). A vir tual circuit that is permanently available. Used to establish 
connections between hosts that communicate frequently.
R
Router. The central switching device in a packet-switched computer network that directs and controls the 
flow of data through the network.
S
Subnet Mask. The IP addressing system allows subnetworks or “interchanges” to be created, and devices 
numbers or “extensions” to be established within these subnetworks. These numbers are created using a 
mathematical device called a subnet mask. A subnet mask, like the IP address, is a set of four numbers in 
dotted decimal notation. Subnet masks typically take three forms:
 255.0.0.0
 255.255.0.0
 255.255.255.0
The number 255 “masks” out the corresponding number of the IP address, resulting in IP address numbers 
that are valid for the network. For example, an IP address of 123.45.67.89 and a subnet mask of 
255.255.255.0 results in a sub network number of 123.45.67.0 and a device number of 89.
The subnet mask used for the network typically corresponds to the class of IP address assigned, as shown 
in the following table.
IP Address Class Dotted-Decimal Notation Ranges Corresponding Subnet Mask
Class A 1.xxx.xxx.xxx to 126.xxx.xxx.xxx 255.0.0.0
Class B 128.0.xxx.xxx to 191.255.xxx.xxx 255.255.0.0
Class C 192.0.0.xxx to 223.255.255.xxx 255.255.255.0 
						

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SYN Flood. A method that the user of a hostile client program can use to conduct a denial-of-service (DOS) 
attack on a computer ser ver. The hostile client repeatedly sends SYN (synchronization) packets to ever y 
port on the ser ver, using fake IP addresses.
T
TCP/IP (Transmission Control Protocol/Internet Protocol). A method of packet-switched data 
transmission used on the Internet. The protocol specifies the manner in which a signal is divided into par ts, 
as well as the manner in which “address” information is added to each packet to ensure that it reaches its 
destination and can be reassembled into the original message.
Transmission Control Protocol/Internet Protocol (TCP/IP). See TCP/IP.
U
UDP (User Datagram Protocol). A TCP/IP protocol describing how data packets reach application programs 
within a destination computer.
V
VPI (Virtual Path Identifier). Identifier contained in the ATM cell header to designate the vir tual path on the 
physical ATM link.
VCI (Virtual Channel Identifier). Identifier contained in the ATM cell header to designate the vir tual channel 
on the physical ATM link.
W
Wireless. Transmission of data over radio waves rather than wiring. 
Wireless channel. The 2Wire gateway suppor ts up to 13 wireless channels (based on country restrictions). 
For example, the United States and Canada support channels 1 to 11; Europe and Australia suppor t 
channels 1 to 13. 
In an 802.1b or 802.11g wireless network, data is transmitted at 2.5GHz. Wireless nodes communicate 
with each other using radio frequency signals in the band between 2.4GHz and 2.5GHz. Neighboring 
channels are 5 MHz apart; however, due to the spread spectrum effect of the signals, a node sending 
signals using a particular channel will use frequency spectrum 12.5HHz above and below the center 
channel frequency. As a result, two separate wireless networks using neighboring channels (for example, 
channels 1 and 2) in the same general vicinity will interfere with each other. Applying two channels that 
allow the maximum channel separation (such as channels 1 and 6, or channels 6 and 11) will provide a 
noticeable performance increase over networks with minimal channel separation.
The radio frequency channels used in 802.11b/g networks are shown in the following table.
Channel Range
Channel 1 2399.5 MHz - 2424.5 MHz
Channel 2 2404.5 MHz - 2429.5 MHz 
						

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The preferred channel separation between the channels in neighboring wireless networks is 25 MHz (5 
channels). This means that you can apply up to three different channels within your wireless network. There 
are only 11 usable wireless channels in the United States. It is recommended that you star t using channel 
1 and expand to channel 6 (and 11 when necessar y), as these three channels do not overlap.Channel 3 2409.5 MHz - 2434.5 MHz
Channel 4 2414.5 MHz - 2439.5 MHz
Channel 5 2419.5 MHz - 2444.5 MHz
Channel 6 2424.5 MHz - 2449.5 MHz
Channel 7 2429.5 MHz - 2454.5 MHz
Channel 8 2434.5 MHz - 2459.5 MHz
Channel 9 2439.5 MHz - 2464.5 MHz
Channel 10 2444.5 MHz - 2469.5 MHz
Channel 11 2449.5 MHz - 2474.5 MHz
Channel 12 2454.5 MHz - 2479.5 MHz
Channel 13 2459.5 MHz - 2484.5 MHz Channel Range 
						

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Regulatory Information
Electrical
AC Adapter
The AC adapter is designed to ensure your personal safety and to be compatible with this equipment. Please follow these guidelines:


grounding requirements are found on the product case and/or 
packaging.

 vice the adapter. There are no serviceable par ts inside. Replace the unit if it is damaged or exposed to excess 
moisture.
Telecommunication Cord
CAUTION: To reduce the risk of fire, use only No. 26 AWG or larger UL Listed or CSA Cer tified Telecommunication Line Cord.
Location – Electrical Considerations
WARNING:  The electrical cord of this product must be plugged into a properly grounded outlet or adapter.  Failure to comply could 
result in an electric shock hazard.  If you do not know whether your outlet or adapter is properly grounded, you should consult a 
licensed electrician.
CAUTION: Due to risk of electrical shock or terminal damage, do not use the terminal near water, including a bathtub, wash bowl, 
kitchen sink or laundry tub, in a wet basement, or near a swimming pool. Also, avoid using this product during electrical storms. Avoid 
locations near electrical appliances or other devices that cause excessive voltage fluctuations or emit electrical noise (for example, air 
conditioners, neon signs, high-frequency or magnetic security devices, or electric motors).
Equipment
Repairs
Do not, under any circumstances, attempt any service, adjustments, or repairs on this equipment. Instead, contact your local 2Wire 
distributor or ser vice provider for assistance. Failure to comply may void the product warranty.
Location – Environmental Considerations
Do not plug the power pack into an outdoor outlet or operate the terminal outdoors. It is not waterproof or dustproof, and is for indoor 
use only. Any damage to the unit from exposure to rain or dust may void your warranty.
Do not use the terminal where there is high heat, dust, humidity, moisture, or caustic chemicals or oils. Keep the gateway away from 
direct sunlight and anything that radiates heat, such as a stove or a motor.
Declaration of Conformity 
FCC Compliance
The following device has been tested and certified as compliant with the regulations and guidelines set for th in Par t 68 of FCC
Rules:
Manufacturer: 2Wire, Inc.
Model: 2701HGV-W
Part 15 of FCC Rules
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation. 
						

							Regulatory Information
132
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. 
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment 
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause 
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular 
installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the 
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:




CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void your authority to 
operate this equipment.
Part 68 of FCC Rules
This equipment complies with Par t 68 of the FCC Rules. On the modem board inside full featured base stations is a label that 
contains, among other information, the FCC registration number and ringer equivalence number (REN) for this equipment. If requested, 
this information may be provided to the telephone company.
The REN is used to determine the quantity of devices that may be connected to the telephone line. Excessive RENs on the telephone 
line may result in the device not ringing in response to an incoming call. In most, but not all areas, the sum of the RENs should not 
exceed five (5.0). 
L’indice d’équivalence de la sonnerie (IES) ser t à indiquer le nombre maximal de terminaux qui peuvent être raccordés à une interface 
téléphonique. La terminaison d’une interface peut consister en une combinaison quelconque de dispositifs, à la seule condition que 
la somme d’indices d’équivalence de la sonnerie de tous les dispositifs n’excède pas 5.
To be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the telephone 
company to determine the maximum RENs for the calling area.
This terminal cannot be used on telephone-company-provided coin ser vice. Connection to Party Line Service is subject to state tariffs.
This equipment uses the following USOC jacks: RJ11C, RJ45 (WAN/Ethernet)
An FCC-compliant telephone cord and modular plug is provided with this equipment. This equipment is designed to be connected to the 
telephone network or premises wiring using a compatible modular jack that is Par t 68 compliant. If this equipment causes harm to the 
telephone network, the telephone company will notify you in advance that temporar y discontinuance of ser vice may be required. If 
advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be advised of your 
right to file a complaint with the FCC if you believe it is necessar y. The telephone company may make changes in its facilities, 
equipment, operations, or procedures that could affect the operation of this equipment. If this happens, the telephone company will 
provide advance notice in order for you to make the necessary modifications to maintain uninterrupted service. If trouble is 
experienced with this equipment, please contact 2Wire, or your local 2Wire distributor or service center in the U.S.A. for repair and/or 
warrant information. If the trouble is causing harm to the telephone network, the telephone company may request you to remove this 
equipment from the network until the problem is resolved. No repairs can be done by a customer on this equipment. It is 
recommended that the customer install an AC surge arrestor in the AC outlet to which this device is connected. This is to avoid 
damage to the equipment caused by local lightning strikes and other electrical surges.
RF Exposure Information
This device was verified for RF exposure and found to comply with Council Recommendation 1999/519/EC and FCC OET-65 RF 
exposure requirements.
Wi-Fi Only
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. For additional compliance 
information, please reference FCC ID: PGR2W2701. 
						

							MPE/SAR Labeling
WARNING: While this device is in operation, a separation distance of at least 20 cm (8 inches) must be maintained between the 
radiating antenna inside the Equipment Under Test (EUT) and the bodies of all persons exposed to the transmitter in order to meet the 
FCC RF exposure guidelines. Making changes to the antenna or the device is not permitted. Doing so may result in the installed 
system exceeding RF exposure requirements. This device must not be co-located or operated in conjunction with any other antenna or 
radio transmitter. Installers and end users must follow the installation instructions provided in this guide. 
PTC General Warning
The grant of a Telepermit for any item of terminal equipment indicates only that Telecom has accepted that the item complies with 
minimum conditions for connection to its network. It indicates no endorsement of the product by Telecom, nor does it provide any sort 
of warranty. Above all, it provides no assurance that any item will work correctly in all respects with another item of Telepermitted 
equipment of a different make or model, nor does it imply that any product is compatible with all of Telecoms network ser vices.