A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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A security feature for access point that enables you to restrict wireless access to access points to authorized stations only.
Authorized stations are identified by the MAC address of their TrueMobile PC Card in a so-called 'Access Control Table' file that is loaded into the TrueMobile access points as part of the configuration
When Access Control is enabled, the access point will ignore all requests to forward data to/from TrueMobile devices that are not identified in the Access Control Table. You can create or edit Access Control Table files using either the AP Manager or the Client Manager program.
ASCII table that contains all the MAC Addresses of stations authorized to send/receive data via the access point. To build an Access Control Table you can use the AP Manager program.
The Access Control Table is loaded into the access point as part of an configuration upload.
A parameter that enables you to control the responsiveness of the TrueMobile AP Manager Remote Link Test. The Analysis Polling Interval determines how often AP Manager will read the diagnostic tallies of the bridge unit. Valid values: 1-15 seconds.
See also: "Monitoring your TrueMobile Network"
You can use access point in combination with an external antenna to connect two or more buildings. To connect the external antenna to the access point, the access point unit must be equipped with the TrueMobile PC Card. The external antenna will be connected to the card via a Cable Assembly and TrueMobile Lightning Arrester.
A basic access network consists of a small sized wireless LAN, with no connections via gateways or routers. The number of access point in this network typically varies between 1 and 5. The administrator stations need to have the TCP/IP protocol stack loaded and use IP addressing to configure and monitor the access points. IP addressing and the TCP/IP protocol are not strictly necessary for client stations.
A message that is transmitted at regular intervals by the access point to all wireless stations in the domain. Beacon messages are used to maintain and optimize communications by helping mobile TrueMobile stations to automatically connect to the access point that provides the best communications quality.
The standard protocol that is used to configure systems across internetworks.
Memory chip in your access point that contains the startup configuration of the access point. When you change the configuration of the access point unit, the values of the configuration parameters will be stored in the BootROM.
The total number of data packets arriving at the access point from the LAN segment served by the selected wireless network interface. This number reflects the sum of Unicast and Non-Unicast packets.
See also: AP Manager, Monitoring, Remote Statistics
The number of data packets not accepted by the access point.
See also: AP Manager, Monitoring, Remote Statistics
The number of data packets that have been forwarded by the access point to the LAN segment served by the selected interface.
See also: AP Manager, Monitoring, Remote Statistics
A Bridge setup parameter that enables you to influence the choice of the 'Root Bridge' and the 'Designated Bridge' as calculated by the Spanning Tree Algorithm. A low numerical value of the Bridge Priority Parameter makes the bridge more likely to become the designated bridge or Root Bridge (typically '0'). The recommended value is '32768'. Valid values: 0-65000, Initial value: '32768'.
See also: AP Manager, Setup Bridge Parameters
Messages transmitted by a single station (typically a server) to all stations on the network. This type of traffic is also referred to as Non-Unicast messages.
The number of bytes (octets) received at the access point from the LAN segment served by the selected wireless network interface, including framing characters.
See also: AP Manager, Monitoring, Remote Statistics
The number of frames requested by higher level protocols that are to be transmitted to a Non-Unicast address (i.e. a subnetwork broadcast or subnetwork Multicast address). This number includes the frames that were discarded or not sent.
See also: AP Manager, Monitoring, Remote Statistics
The number of packets that were not received properly as a result of a collision, due to multiple stations trying to send packets over the medium simultaneously.
See also: AP Manager, Monitoring, Remote Statistics
DHCP is a Microsoft® proprietary extension to the existing bootstrap protocol (BOOTP). DHCP enables a LAN administrator to have a network server configure workstations with an IP address dynamically without further intervention.
A dynamically assigned IP address is referred to as an 'Active Lease'. The Active Lease usually has an expiration date, which allows re-allocation of IP addresses that are no longer used.
For access points you are advised to use a specific IP address for which there is no expiration date. To do so, you can use your DHCP management program to reserve the IP address or a range of IP addresses.
For network devices that require a specific IP address, or for which you do not want the 'IP address lease' to expire, you can use a DHCP Management program to reserve their IP addresses. This is the case with your access points.
Once a range of IP addresses has been reserved, you can use the values in this range to assign to your TrueMobile system.
The Unique Identifier is the Media Access Control (MAC) address for the DHCP Client. The Client Name should be the computer name for the DHCP Client. However, this name is used for identification purposes in the DHCP Manager interface and, therefore, does not have to be and will not affect the actual computer name.
To see which IP addresses are still available, your DHCP Management program will usually include a 'Scope Active Leases' option. This option allows you to see which DHCP Clients have leased an IP address from the DHCP Server.
A security feature for access point and TrueMobile stations that enables you to encrypt data that is transmitted via the wireless medium. TrueMobile 1150 products are optionally available with a factory-installed encryption chip that is based the WEP encryption algorithm.
To use encryption in your wireless network, all TrueMobile stations and access points must have the encryption feature installed and set to 'Enable'. All access point and TrueMobile devices in the network environment must use the same encryption key.
The encryption key consists of 16 hexadecimal numbers in the range 0-9, A-F. The second digit of each pair must be even (0,2,4,6,8,A,C,E).
A network configuration that has the scale of a corporate LAN. This type of network may include network segments in different departments, interconnected by means of bridges and routers. When the network comprises gateways, routers or bridges, each network device must be identified by a unique IP address. The network may extend to wireless networking in different buildings, where the buildings are connected by a wired link, e.g. a leased line.
The access points maintain dynamic lists to identify the interface where they last spotted the TrueMobile station (either the Ethernet interface, or TrueMobile interface A or B).
When the access point receives a packet addressed to a specific station, this list will help to determine to which interface the packet should be bridged.
When mobile stations roam between multiple cells this table will be updated automatically.
When there is no traffic from or to a specific station for a longer period of time (for example when a station was shut down), the Filter Aging Time determines how long the access point will 'remember' the location of this TrueMobile device.
Basic operating software for TrueMobile PC Card and access point that is factory-installed.
Occasionally firmware upgrades may become available when new functions or features are developed for your TrueMobile product.
Upgrade for the embedded software on the hardware of your TrueMobile product.
For TrueMobile PC Card, firmware upgrades are distributed as an executable file of the format "wsuVVxxx.exe", where "xxx" identifies the version of the upgrade. This executable file is run once on the computer containing the PC Card.
For access point, firmware upgrades are distributed as a binary file of the format "wp2_vxxx.bin", (where "xxx" identifies the version of the firmware. To upgrade the firmware of the access point, use the Upload Software option of the access point menu of your AP Manager program.
A timer for the 'Spanning Tree Algorithm' that prevents a bridge to forward data packets when:
Changes in the Spanning Tree topology must be communicated to all bridges in the bridged network. The Forward Delay timer will compensate for the propagation delays that occur in passing the protocol information, allowing all bridges to close the old data paths, before the new data paths are activated.
Recommended value: 15 seconds
A Spanning Tree parameter that identifies the time interval between Configuration BPDU messages as transmitted by a root bridge or a bridge that is attempting to become the root bridge.
Recommended value: 2 seconds.
The (remote) access point device that you selected to initiate a Remote Link Test with a wireless station connected to the selected access point.
The Remote Link Test Partner can either be a wireless station, or another access point unit.
The Internet Protocol (IP) address is a unique addressing code for computing devices. When your network already uses IP addressing, you must change the factory-set IP address to a value selected from the range of IP addresses assigned to your organization.
See 'Firmware'
A logical area within a network that is connected with other areas via a bridge.
For access points, these areas can either be an Ethernet or TrueMobile segment. For access points there could even be two TrueMobile segments (A and B). Each TrueMobile segment is identified by a unique NWID.
The TrueMobile diagnostics option that enables you to investigate a specific link between two wireless stations.
You can use the Link Test to analyze the quality of the wireless communication, and to determine or optimize the placement of stations and antennas.
16-digit hexadecimal number that identifies a networking product on the network.
An advanced Bridge setup parameter for access points that enables you to deny data traffic between two specific devices via the wireless interface(s) of the access point bridge.
You can use the Static MAC Address filter to optimize the performance of a wireless (and wired) network.
For example, to prevent redundant traffic from being transmitted over the wireless network, you could deny traffic between two particular servers, identified by their MAC Address and their location as perceived by the access point (on the 'wired' or wireless' port of the bridge).
In most situations, however, it will be easier to control redundant traffic via other filtering options, such as 'Protocol Filtering.
An advanced Bridge setup parameter for access point that identifies the maximum age of received Spanning Tree protocol information.
When the bridge receives protocol information that exceeds the Max Age value, the bridge will discard the information and start the Forward Delay timer to allow other bridges to forward updated topology information, e.g. that another bridge has become the Root Bridge.
Recommended value: 20 seconds.
Messages transmitted by a single station (typically a server) to multiple stations on the network. This type of traffic is also referred to as Non-Unicast messages.
In network environments that include several access points, the Multicast Mechanism avoids frame collisions when several access points try to access the wireless medium at the same time, for example in case of messages that are transmitted from one station to multiple stations (Multicast) or all stations (Broadcast) on the network.
The default Multicast Mechanism generates a random delay for each wireless interface of the access point. The random delay is based on the last digits of the MAC address of the inserted TrueMobile PC Card.
Optionally you can define a 'User-defined' Multicast delay in the range of 1-10.
See also: AP Manager Edit parameters.
The Noise level is the level of local background noise as measured at the wireless interface of the access point. The Noise level counter reflects only the Noise Level value (in %) of the latest frame that was received on the interface.
See also: Client Manager Link Test
The number of Non-Unicast packets delivered to a higher protocol, typically Multicast or Broadcast messages.
See also: AP Manager Remote Statistics
The number of packets requested by higher level protocols, to be transmitted to a subnetwork-unicast address, typically Multicast or Broadcast messages. This number includes the frames that were discarded or not sent.
See also: AP Manager Remote Statistics
The number of successfully transmitted frames on a particular interface for which transmission is inhibited by exactly one or more collisions plus the number of collisions detected on a particular interface later than 512 bit-times into the transmission of a packet.
See also: AP Manager Remote Statistics
The 'Packets received/lost' counter displays the percentage of packets received relative to the number of packets expected. The 'packets received/lost' counter is only displayed when you select the View Details option.
See also: Client Manager Link Test.
An advanced Bridge Setup parameter for access point that is used to determine the preferred data paths between bridges throughout the network and the root bridge as calculated by the 'Spanning Tree Algorithm.
The 'Root Bridge' transmits BPDU messages throughout the Local Area Network. When a bridge unit receives a BPDU message at one of its ports, it will add the value in the "Path Cost" field for that port to the value in the 'root path cost field' of the BPDU message prior to forwarding the message again. This will help the other bridges to determine the 'Total Path Cost' to the Root Bridge via this port.
A lower 'Path Cost' value would typically be used for ports to LAN segments closer to the Root Bridge. A higher 'Path Cost' value would typically be used for ports to LAN segments that are 'the leafs' of the Spanning Tree.
For example, when you use the access point as an access point for wireless stations to the Ethernet, a high 'Path Cost' for the TrueMobile port will minimize unnecessary use of the bandwidth for the wireless medium (recommended value 500).
When you use access point units in a wireless point-to-point link to interconnect two LAN segments, a low 'Path Cost' for the TrueMobile port will prioritize this link as compared to other physical links, such as a leased line or low-bandwidth connections.
Valid values: 0-255. Initial value: '100'
A stand-alone workgroup of wireless stations which participate in a small (Peer-to-Peer) network. This is typically the TrueMobile network configuration without access points that could connect the stations into a network infrastructure.
The stations must be configured to operate in Peer-to-Peer mode.
A wireless connection between two or more remote locations, such as multiple buildings on a campus location.
In (outdoor) point-to-point link configurations, you will typically use two or more access point units that have been equipped with TrueMobile Range Extender Antenna and external antennas.
The wireless interfaces on both ends of the antenna link must be configured with an identical NWID.
An advanced Bridge Setup parameter for access point that enables you to influence which port should be included in the Spanning Tree, when concurrent bridge ports of a single bridge unit are connected in a loop.
A lower value makes a port more likely to become selected in the Spanning Tree than the concurrent one that has a higher numerical value. Valid values: 0-255. Initial value: '128'
A security option that enables you to create a network management level by means of a password.
For example, the 'Read Password' in combination with the correct IP address will authorize a local LAN administrator to display only the AP Manager Monitor function for a specific access point, but not to view or modify the access point configuration.
You can set the 'Read Password' using the SNMP tab in the AP Manager program.
A security option that enables you to create a network management level, by means of a password.
For example, the 'Read/Write' password in combination with the correct IP address will authorize a Corporate LAN Administrator to display all AP Manager Monitor functions and to display or edit the access point configuration.
You can set the 'Read/Write' password using the SNMP tab in the AP Manager program.
The TrueMobile diagnostics option of the Client Manager program. You can use the Remote Link Test to analyze the Link Quality between a remote access point and a station connected to the selected access point unit.
This option is often used to investigate wireless outdoor links, or to analyze the Link Quality of wireless stations in a remote network.
Roaming is a function that enables mobile TrueMobile devices to migrate between different physical locations within the LAN environment.
To allow roaming each of these locations must be services by the access point.
The roaming functionality will monitor the communications quality with the access points and, if required, automatically connect to another access point to maintain the network connection.
Roaming is only possible within one domain, i.e., as long as the mobile station is within range of access points that are identified by the same Wireless Network Name.
The signal level indicates the strength of the TrueMobile signal as received at the wireless network interface.
The TrueMobile diagnostics option of the Client Manager program that enables you to display the communications quality of multiple access point units simultaneously. You can use the Site Monitor to investigate the overall coverage of your TrueMobile network, and to perform site verifications.
A procedure to determine or optimize the placement of your access point.
A standard network protocol that can be used to manage networks locally, or worldwide via the Internet.
An advanced Security option that enables you to authorize SNMP management to a restricted group of SNMP Management stations.
To authorize a station to access the access point configuration or diagnostic information, you will need to add the IP address of that station to the so-called SNMP IP Access List.
When you enable the SNMP IP access option, the access point will deny all requests to read the configuration data or diagnostic tallies when the IP address of the requesting station is not registered in the SNMP IP access list.
You can use the SNMP IP Access List in combination with other security options such as the 'Read' and 'Read/Write' passwords.
To create or edit the SNMP IP Access List, use the SNMP tab of the AP Manager program.
A parameter that enables you to control the responsiveness of the AP Manager Monitor options. Valid values: 1 second - 5 minutes.
SNMP trap messages are part of the trap host mechanism which can be used to inform a network administrator when somebody resets the access point unit, loads a new configuration into the access point, or performs a forced reload procedure.
The trap host alert message will enable the network administrator to verify whether this was an authorized action or not.
To receive the Trap Alert messages, the management station needs to have a standard Trap Host Agent installed to handle the trap messages.
The Signal-to-Noise Ratio (SNR) is the primary diagnostic counter to diagnose wireless performance. The SNR indicates the relative strength of the received Signal Level compared to The Local Noise Level.
An advanced Bridge setup option for complex network topologies that enables you to enhance data traffic efficiency and eliminate the possibility of data loops.
With the spanning tree algorithm, all bridges on the LAN exchange special configuration messages that allow them to:
The spanning tree algorithm enables bridges to calculate a loop-free subset of the LAN topology (a tree) that provides the most efficient level of connectivity between every pair of physically connected Local Area Network segments.
If the 'shortest data path' fails, (for example as a result of a physical breakdown), the Spanning Tree will automatically rebuild the topology within the confines of the available bridged LAN components.
The station name is an optional parameter that may be used to designate wireless devices in the network. The name can help to identify a device in one of the TrueMobile diagnostic utilities. A station name can consist of up to 31 alphanumeric characters.
An advanced Bridge setup option that you can use to protect the network against data overload by:
The 'Storm Threshold' parameters allow you to specify a set of thresholds for each port of the access point, identifying separate values for the number of broadcast messages/second and Multicast messages/second.
When the number of frames for a port or identified station exceeds the maximum value per second, the access point will ignore all subsequent messages issued by the particular network device, or ignore all messages of that type.
A subnet is a logical sub-division of a Local Area Network that has been divided by means of routers or gateways. A subnet may include multiple LAN segments.
Each subnet is identified by the Subnet Mask.
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NOTE: TrueMobile 1150 roaming does not work over routers. To allow mobile stations to roam between different wireless cells, all wireless stations and access points must be connected to the same LAN subnet. |
An advanced IP Parameter Setup counter that you can you use to maintain network efficiency. The purpose of the Time To Live counter (TTL) is to avoid endless forwarding of message frames with an incorrect address that pollute the network medium.
The TTL defines a maximum number of passes per hop. Each time the frame is forwarded by a router, the TTL counter decreases by one. When the TTL = 0, the frame is rejected.
The number of subnetwork-frames delivered to a higher protocol. This is 'true data' from station to station.
The number of bytes (octets) transmitted out to the interface.
This is 'true data' from station to station.
The amount of time elapsed since the last time the access point unit was powered up, reset, or uploaded with a new configuration.
A Windows® workgroup
can consist of either wireless or wired network connections or a combination
of the two. Usually a Windows workgroup consists of members who are related
because of a shared function, e.g. members of the same department. For a Windows
workgroup it is not relevant where the workgroup participants are located, since
the members of a Windows workgroup are identified by their workgroup name only.