Handbook
Axell Wireless Limited
Technical Literature
WMATA CRCS Redundant Antenna System
General Overview
Document Number 60-228701HBK Issue No. 3 Date 28/05/2010 Page 7 of 114
2.5. Chemical Hazard
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in
devices within equipment produced by Axell Wireless Ltd. Beryllium oxide dust can be toxic if
inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact.
Products that contain beryllium are load terminations (dummy loads) and some power
amplifiers. These products can be identified by a yellow and black “skull and crossbones” danger symbol
(shown above). They are marked as hazardous in line with international regulations, but pose no threat
under normal circumstances. Only if a component containing beryllium oxide has suffered catastrophic
failure, or exploded, will there be any danger of the formation of dust. Any dust that has been created will be
contained within the equipment module as long as the module remains sealed. For this reason, any module
carrying the yellow and black danger sign should not be opened. If the equipment is suspected of failure, or
is at the end of its life-cycle, it must be returned to Axell Wireless Ltd. for disposal.
To return such equipment, please contact the Operations Support Department, who will give you a Returned
Materials Authorization (RMA) number. Please quote this number on the packing documents, and on all
correspondence relating to the shipment.
Polytetrafluoroethylene, (P.T.F.E.) and P.T.F.E. Composite Materials
Many modules/components in AWL equipment contain P.T.F.E. as part of the RF insulation barrier.
This material should never be heated to the point where smoke or fumes are evolved. Any person feeling
drowsy after coming into contact with P.T.F.E., especially dust or fumes should seek medical attention.
2.6. Laser Safety
General good working practices adapted from
EN60825-2: 2004/ EC 60825-2:2004
Do not stare with unprotected eyes or with any unapproved optical device at the fiber ends or
connector faces or point them at other people, Use only approved filtered or attenuating
viewing aids.
Any single or multiple fiber end or ends found not to be terminated (for example, matched, spliced) shall be
individually or collectively covered when not being worked on. They shall not be readily visible and sharp
ends shall not be exposed.
When using test cords, the optical power source shall be the last connected and the first disconnected; use
only approved methods for cleaning and preparing optical fibers and optical connectors.
Always keep optical connectors covered to avoid physical damage and do not allow any dirt/foreign material
ingress on the optical connector bulkheads.
The optical fiber jumper cable minimum bend radius is 3cm; bending to a smaller radius may result in optical
cable breakage and excessive transmission losses.
Caution: The F/O units are NOT weather proof.
2.7. Emergency Contact Numbers
The AWL Operations Support Department can be contacted on:
Telephone +44 (0)1494 777000
Fax. +44 (0)1494 777002
e-mail qa@axellwireless.com