Cloud-based reliable and high capacity SS7/SIGTRAN SMSC platform with SMPP API.

SS7 SMSCs (Short Message Service Centres) are how SMS are sent between mobiles (P2P SMS) and between applications and mobiles (A2P SMS) and as such are an essential and core part of mobile communications. The Melrose Labs SS7 SMSC is a high capacity SMSC platform that supports SIGTRAN connections to your network for sending messages from applications to mobiles.

The SMSC supports GSM MAP (Mobile Application Part) to communicate with SS7 networks, primarily using MAP SRIfSM and FSM operations. Application communication with the SS7 SMSC uses the industry-standard SMPP protocol. Using SMPP, messages can be submitted to the SMSC for delivery to mobiles and a delivery receipt returned to the application when the message is delivered or otherwise found to be undeliverable. CDRs are generated for all SMS processed by the SMSC and include IMSI and MSC details for each message.

Performance of the SS7 SMSC platform can be scaled up to 500 SMS/second, subject to sufficient M2PA or M3UA SIGTRAN link capacity available to your core network. Per-destination mobile queues are used to minimise delivery latency for multiple messages to the same mobile number, as is the case for long SMS or concatenated SMS. Reporting can be used to analyse SMS traffic sent via the SMSC, including a breakdown of traffic by network and by delivery outcome. Monitoring allows for the status of the SMSC to be determined by your operations team.


We provide a free sandbox SCCP Hub that you can use for testing and development with SIGTRAN M3UA.

Find out how to use this service at

Example SS7 app with SMPP server:


We will be providing a RESTful SS7 MAP API that connects into your signalling infrastructure using SIGTRAN. The API will enable GSM MAP operations for mobility, call handling, supplementary services, SMS and location service management. Using the SS7 MAP API, developers can build sophisticated applications that interact with mobile networks and benefit from tight integration with the network.

To use this service, you must already have access to a signalling network that provides SIGTRAN connections.

For SMSCs and SMS gateways we suggest you also take a look at the following:

Service snapshot

  • GSM MAP (Mobile Application Part) 3GPP TS 23.040
  • SMPP v5 API (inc. SMPP v3.3 and v3.4)
  • Mobile Terminated (MT) SMS
  • Option for Virtual Mobile (MO SMS)

Find out more...

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