Yaxin Electronics Science and Technology Co.,Ltd.
CDMA(800MHz), GSM900, GSM1800 base station antenna used in the field of mobile communications.
http://www.yaxincom.com/

Racal Antennas
Military antennas and telescopic support masts available at Racal Antennas UK. Design and manufacture of military antennas, telescopic support masts, VHF, HF, UHF antennas for the military.
http://www.racalantennas.com/

Sofimation
Fading Simulator SOFI 05 Radio channel simulator. 3G conformity and deployment tests Release 5. Multipath Fading Simulator for GSM450/480/750/850/RGSM/DCS/PCS/3GPP. Phone: +358-9-4780 4400 (UTC+2 hours) Fax: +358-9-4780 4440 (24h)Email: sales@sofimation.com Author: Vesa Huhtilainen 94-06
http://www.sofimation.com/

GSMaster
Provides technical information and photographs on a range of mobile phones.
http://gsmaster.yoll.net/

RFC 3292
General Switch Management Protocol (GSMP) V3. A. Doria, F. Hellstrand, K. Sundell, T. Worster. June 2002.
http://tools.ietf.org/html/rfc3292

RFC 3293
General Switch Management Protocol (GSMP) Packet Encapsulations for Asynchronous Transfer Mode (ATM), Ethernet and Transmission Control Protocol (TCP). T. Worster, A. Doria, J. Buerkle. June 2002.
http://tools.ietf.org/html/rfc3293

RFC 3294
General Switch Management Protocol (GSMP) Applicability. A. Doria, K. Sundell. June 2002.
http://tools.ietf.org/html/rfc3294

RFC 3295
Definitions of Managed Objects for the General Switch Management Protocol (GSMP). H. Sjostrand, J. Buerkle, B. Srinivasan. June 2002.
http://tools.ietf.org/html/rfc3295

gsmlib
This distribution includes a library to access GSM mobile phones through GSM modems. Features include: modification of phonebooks stored in the mobile phone or on the SIM card, reading and writing of SMS messages stored in the mobile phone, sending and reception of SMS messages.
http://www.pxh.de/fs/gsmlib/