HSL Mobile Messaging SMS Gateway
sms gateway, sms provider, smsc, smpp, sms, global sms, bulk sms
http://www.hslsms.com

Send SMS messages
The Short Message Service (SMS) was originally defined as part of the GSM
http://www.designer4host.com/

SMS Data Products Group, Inc
With over 29 years of experience, SMS Data Products Group designs, builds and supports enterprise network architectures, customizing each solution to meet our customers’ unique requirements
http://www.sms.com/