Hot offers:

To develop SMPP 3.4 Gateway to act likes SMS Gateway.
The software should be done with pure PHP and run on Linux/FreeBSD.

SMPP Gateway should handle any type of incoming messages; such as payload, TLV, UDH, Unicode messages, etc.

The main functionalities for the software:

Distributed architecture allowing maximum flexibility and scalability,
Auto recovery and restart functionality,
Easy, quick and smooth software and hardware upgrades
Industry Standard SMPP 3.4 for external and internal connections,
Support of multiple SMSC connections,
Support of multiple SMPP client connections,
Support of load sharing between SMSC connections,
Support of message exchange between multiple SMS Centers over SMPP connections,
Support of traffic limitation for SMPP clients (individual and overall),
Configurable retry periods and policies for waiting messages,
Support of Prefix/text based barring and masking for individual SMPP clients,
Online Counters for engineering and marketing statistics,
Flexible CDR and file format,
User Friendly GUIs for the alarm monitoring, configuration and statistical reporting,
Support of 7, 8, 16 bit messages,
Support of universal languages including Arabic and Russian,
Real time SMS charging possibilities.
Ability to see the short message content.
Ability to send back delivery status for connected users.