Mesh - community networks of the future?

Mesh networks differ from other networks in architecture - the component parts can connect to a number of neighbor nodes. It allows for continuous connections and reconfiguration around broken or blocked paths by jumping from node to node until the destination is reached.
The main features of wireless mesh networks:

• dynamically arranged connections - routes of packets depend on the state and work load of individual nodes,
• due to switching between the nodes - the risk of disruption of data transmission is considerably lower than in the case of star-shape architecture,
• possibility of quicker transmission thanks to lack of a central node,
• easy expansion by adding new nodes,
• new nodes can be installed in any places where they can communicate with other nodes and power supply is available.

So far, there is no final standard for this kind of wireless networks, but the work is on track since 2003 (the proposals were submitted to a vote in 2005). The result is IEEE 802.11s - a draft IEEE 802.11 amendment for mesh networking. Lack of accepted standard is the reason that mass development of the networks is a matter of time. This kind of solution is often used for applications requiring good network coverage and high reliability, where wired systems are not available or feasible.

Halogen-free TRISET cables

Halogen-free TRISET cables The new cables from TRISET family - TRISET-113 HF E1019 and TRISET-11HF E1029 are manufactured using HF (halogen free) technology. When burning, they do not give off toxic gases.
This feature allows to use the cables in public buildings (hospitals, schools, theaters etc). In such buildings there have to be used safe cables which, in the case of fire, do not pose any additional risk for people. It is not permissible to use compounds of chlorine, fluorine, bromine, or iodine - the halogen compounds hazardous to health (carcinogenic) that would give off in high temperature.

Cables in PVC sheath (containing chlorine) and those based on polyethylene and polypropylene (admixture of bromine) are halogen cables. In the mentioned halogen-free cables there are used more expensive aluminum compounds instead.

The halogen-free TRISET cables belong to NC/LSOH group, i.e. they do not emit corrosive fumes (Non Corrosive), or much smoke (Low Smoke), or, of course, halogen compounds (O Halogen - Zero Halogen - sometimes marked as ZH).

The both cables comply with EN 50268-1, 2 - (low smoke) and EN 50267-2-2 (non-corrosive, halogen free).
TRISET family has been awarded at SatKrak 2007 (international satellite trade fair in Krakow). Due to low loss, high screening efficiency, and perfect matching, TRISET cables ensure high performance of multiswitch systems and large cable installations (MATV, cable TV).

TRISET HF cables comply with highest safety standards and feature outstanding technical parameters:

• high screening efficiency (A-class: above 100 dB),
• low loss (at 2150 MHz: TRISET-113HF - 27.7 dB, TRISET-11 HF - 21.0 dB).

ANGA Cable 2008

ANGA Cable 2008, May 27 - 29, Cologne, Germany. This year's trade fair was a success - more exhibitors and visitors, perfect order and excellent organization. There were present the "typical" companies like TELEVES, TERRA, ALCAD, Kathrein, but also the representatives of Web technology, e.g. Cisco.