• A K D Communications Ltd
  PO Box 499, Aston Clinton, AYLESBURY, Buckinghamshire, HP22 5GZ
• A W S
  46 Hyde Road, Caddington, LUTON, Bedfordshire, LU1 4HE
• Absolute Voice & Data
  Scotsbridge House, Scots Hill, Croxley Green, RICKMANSWORTH, Hertfordshire, WD3 3BB
• Activ8 Distribution
  Unit 22 Park House, 15-19 Greenhill CR, WATFORD, Hertfordshire, WD18 8PH
• Advanced Technology
  1 Johnson Court, HEMEL HEMPSTEAD, Hertfordshire, HP3 9JT
• Aerial Engineering Co Ltd
  5 Curfew Yard, Thames Street, WINDSOR, Berkshire, SL4 1SN
• Airspan Communications Ltd
  Cambridge House, Oxford Road, UXBRIDGE, Middlesex, UB8 1UN
• Airspan Networks Eastern Europe Ltd
  Cambridge House, Oxford Road, UXBRIDGE, Middlesex, UB8 1UN
• Alban Telecom Ltd
  Apsley Mill Cottage, London Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9QU
• Applied Telecom
  11a Pinkneys Road, MAIDENHEAD, Berkshire, SL6 5DJ
• Area Communications
  16 Acacia Avenue, Wraysbury, STAINES, Middlesex, TW19 5HD
• Aspect Software UK Ltd
  2 The Square, Stockley Park, UXBRIDGE, Middlesex, UB11 1AD
• Aspen Electronics Ltd
  1-3 Kildare Close, RUISLIP, Middlesex, HA4 9UR
• Axis Network Technology
  Unit 7 Midshires Business Park, Smeaton Close, AYLESBURY, Buckinghamshire, HP19 8HL
• Benetix Ltd
  Unit 14 Grove Park Industrial Estate, Waltham Road, White Waltham, MAIDENHEAD, Berkshire, SL6 3LW
• Bruel & Kjaer
  92 Uxbridge Road, Harrow Weald Lodge, HARROW, Middlesex, HA3 6BZ
• Bulk GSM
  Unit 25 Cygnus Business Centre, Dalmeyer Road, LONDON, Greater London, NW10 2XA
• Business Systems (U.K.) Ltd
  462 London Road, ISLEWORTH, Middlesex, TW7 4ED
• C K Business Systems
  46 Horsenden La North, GREENFORD, Middlesex, UB6 0PA
• Capital Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE
• Certacom (Switching) Ltd
  1 Holtspur Lane, Wooburn Green, HIGH WYCOMBE, Buckinghamshire, HP10 0AA
• Chiltern Telecom Ltd
  61 Union Street, DUNSTABLE, Bedfordshire, LU6 1EX
• Communications Accessories & Equipment Ltd
  Unit 19 Apex Business Centre, Boscombe Road, DUNSTABLE, Bedfordshire, LU5 4SB
• Communio Group Ltd
  1 Frogmore Road Industrial Estate, Frogmore Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9TG
• Comverse UK Ltd
  Cranbourne House, 135 Bath Road, SLOUGH, Berkshire, SL1 3UX
• Conor & Stuart Communications Ltd
  130 Park Avenue, BUSHEY, Hertfordshire, WD23 2BB
• Converse UK Ltd
  Hertford Place, RICKMANSWORTH, Hertfordshire, WD3 9XF
• Cryo Systems Ltd
  Eaton House, Eaton Green Road, LUTON, Bedfordshire, LU2 9LD
• Cubix Ltd
  34 Candlemas Lane, BEACONSFIELD, Buckinghamshire, HP9 1AF
• Daltec Associates Ltd
  5 Oxford Road, Wealdstone, HARROW, Middlesex, HA3 7RG
• Data Sharp
  Snaresbrook Drive, STANMORE, Middlesex, HA7 4QN
• Data-Flo Business Solutions
  Research House, Fraser Road, Perrivale, GREENFORD, Middlesex, UB6 7AQ
• Datacomms
  Berry Lane, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5EX
• Datasharp It Solutions
  Cardinal Point, Park Road, RICKMANSWORTH, Hertfordshire, WD3 1RE
• Datasharp Telecom
  Linton House, The Rowans, Chalfont St. Peter, GERRARDS CROSS, Buckinghamshire, SL9 8SE
• Discount Payphones
  177 High Street, Langley, SLOUGH, Berkshire, SL3 8LP
• Dolphin Communications
  85 Kingsley Road, HOUNSLOW, Middlesex, TW3 4AH
• Duplex Corporate Communications
  55 Station Road, BEACONSFIELD, Buckinghamshire, HP9 1QL
• Ecocall Ltd
  Ver House, 23 High Street, Redbourn, ST ALBANS, Hertfordshire, AL3 7LE
• Elephant Talk Communications PRS U.K. Ltd
  Unit 24 Hallmark Trading Estate, Fourth Way, Wembley, Middlesex, HA9 0LB
• Envoy Holdings Ltd
  2 The Square, Stockley Park, UXBRIDGE, Middlesex, UB11 1AD
• Euro Worldwide Communications
  85 Kingsley Road, HOUNSLOW, Middlesex, TW3 4AH
• Exchange Communications (U.K.) Ltd
  3 Metro Centre, Ronsons Way, Sandridge, ST ALBANS, Hertfordshire, AL4 9QT
• F.B.S. Telecommunications Ltd
  19 Hemel Hempstead Road, Redbourn, ST ALBANS, Hertfordshire, AL3 7NL
• Frame Communications
  Unit 7 Midshires Business Park, Smeaton Close, AYLESBURY, Buckinghamshire, HP19 8HL
• Fulcrum Systems
  Hillbottom Road, Sands Industrial Estate, HIGH WYCOMBE, Buckinghamshire, HP12 4HJ
• Funis
  Star House, Star Road, UXBRIDGE, Middlesex, UB10 0QH
• G M A UK Ltd
  PO Box 581, Croxley Green, RICKMANSWORTH, Hertfordshire, WD3 3ZY
• G P T Video Systems
  Foundation Park, 6 Roxborough Way, MAIDENHEAD, Berkshire, SL6 3UD
• GC Communication Systems
  32 Highland Road, AMERSHAM, Buckinghamshire, HP7 9AX
• Gigasat Ltd
  21 Moor End, Eaton Bray, DUNSTABLE, Bedfordshire, LU6 2HN
• Grapevine Communications London
  488 ST. Albans Road, WATFORD, Hertfordshire, WD24 6QU
• Grapevine Communications Ltd
  346-348 ST. Albans Road, WATFORD, Hertfordshire, WD24 6PQ
• I Tofte
  32 Bronte Close, AYLESBURY, Buckinghamshire, HP19 8LF
• In Touch Technologies
  The Counting House, 9 High Street, TRING, Hertfordshire, HP23 5AH
• In Touch Technologies UK Ltd
  81-82 Akeman Street, TRING, Hertfordshire, HP23 6AF
• Internet Videocommunications Ltd
  Alexander House Mere Park, Dedmere Road, MARLOW, Buckinghamshire, SL7 1FX
• K D Controls Ltd
  Unit 4 Marsh Hill Farm, Marsh, AYLESBURY, Buckinghamshire, HP17 8ST
• Kokusai Electric Europe GmbH
  West Cross Centre, Great West Rd., BRENTFORD, Middlesex, TW8 9ER
• Landmark Mayo Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE
• Live Link Video Communications Ltd
  Alexander House Mere Park, Dedmere Road, MARLOW, Buckinghamshire, SL7 1FX
• Longcroft (GX) Management Company Ltd
  49 Station Road, GERRARDS CROSS, Buckinghamshire, SL9 8ES
• Mavisat Ltd
  2 Wokingham Road, READING, Berkshire, RG6 1JG
• Meteor Communication Ltd
  Hertfordshire Business Centre, Alexander Road, London Colney, ST ALBANS, Hertfordshire, AL2 1JG
• Microwave Network Inc
  7 Clivemont Road, MAIDENHEAD, Berkshire, SL6 7BU
• Miton Systems Ltd
  49 Dove Park, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5NY
• More International
  1 Buckingham Place, Bellfield Road, HIGH WYCOMBE, Buckinghamshire, HP13 5HW
• Multi Products Corporation Ltd
  10 Dudley Street, LUTON, Bedfordshire, LU2 0NT
• North West Telecom
  40 Craven Park Road, LONDON, Greater London, NW10 4AE
• Nu Technologies Ltd
  Regent Court, Laporte Way, LUTON, Bedfordshire, LU4 8LW
• Olympia Technology
  5 Archdale Business Centre, Brember Road, HARROW, Middlesex, HA2 8DJ
• Pctel Ltd
  6 Bridgegate Business Park, Gatehouse Way, Gatehouse Industrial Area, AYLESBURY, Buckinghamshire, HP19 8XN
• Primex Solutions
  Crystal House, 7 New Bedford Road, LUTON, Bedfordshire, LU1 1HS
• Procom (Installations) Ltd
  H Abbeygate Business Centre, Hitchin Road, LUTON, Bedfordshire, LU2 0ER
• Quick Eagle Networks
  Cardinal Point, Park Road, RICKMANSWORTH, Hertfordshire, WD3 1RE
• S W Communications
  38 Station Road, North Harrow, HARROW, Middlesex, HA2 7SE
• Scribble Communications Ltd
  MWB Business Exchange, 2 Gayton Road, HARROW, Middlesex, HA1 2XU
• Sedgewall Communications Group Ltd
  Unit 19 Apex Business Centre, Boscombe Road, DUNSTABLE, Bedfordshire, LU5 4SB
• Sound Concepts
  56 St Saviours Cresent, LUTON, Bedfordshire, LU1 5HG
• Splicecom Telecommunications Equipment
  The Hall Business Centre, Berry Lane, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5EX
• Synectiv
  MWB Business Exchange, 2 Gayton Road, HARROW, Middlesex, HA1 2XU
• T.Mina Communication
  88 Leagrave Road, LUTON, Bedfordshire, LU4 8HZ
• Talkforless Communications Ltd
  Unit 24 Hallmark Trading Estate, Fourth Way, Wembley, Middlesex, HA9 0LB
• Target Telecom
  Unit 18, Thrales End Lane, HARPENDEN, Hertfordshire, AL5 3NS
• Tech Wonders
  Unit 29 Park Royal Business Centre, 9-17 Park Royal Road, LONDON, Greater London, NW10 7LQ
• Technical Professional Radio Solutions Ltd
  1 Grove Park Industrial Estate, White Waltham, MAIDENHEAD, Berkshire, SL6 3LW
• Telecom Resource
  Archway House, Orphanage Road, WATFORD, Hertfordshire, WD17 1PG
• Telenova Ltd
  144 Regina Road, SOUTHALL, Middlesex, UB2 5PP
• The Professional Monitor
  43-45 Crawley Green Road, LUTON, Bedfordshire, LU2 0AA
• Unison Corporate Communications
  Unit 19 Apex Business Centre, Boscombe Road, DUNSTABLE, Bedfordshire, LU5 4SB
• Vtech Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE
• Wallis Technologies
  155 ST. Pauls Avenue, HARROW, Middlesex, HA3 9PT
• Whiterock Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE