Industrial Grade SMPP Connectivity
Direct connection to operator SMSC via SMPP 3.4. Engineered for high-volume enterprises sending millions of messages daily.
Technical Specifications
Why Choose SMPP over HTTP API?
Persistent Connection
Unlike HTTP which opens a new connection for every request, SMPP maintains a persistent TCP session, eliminating handshake latency.
Bi-Directional Async
Send messages and receive delivery reports asynchronously in the same session without polling.
Maximum Throughput
Designed for speed. Send up to 5,000 SMS per second per bind. Ideal for political campaigns, banking alerts, and OTPs.
Connection Parameters
Understanding SMPP Connectivity for Enterprise SMS
SMPP (Short Message Peer-to-Peer) is the telecom-grade protocol that sits underneath every high-volume SMS platform in India. Instead of firing an individual HTTP request for each message, your application opens a single authenticated TCP session with our SMSC and streams messages through it. That persistent session is what lets banks, fintechs, and large aggregators push millions of OTPs and alerts per day without the connection overhead that throttles HTTP integrations.
A typical enterprise integration binds in transceiver (TRX) mode, submits messages with submit_sm PDUs, and receives delivery receipts asynchronously as deliver_sm PDUs on the same link. Because delivery reports arrive in real time — rather than requiring you to poll a status endpoint — you get accurate, low-latency visibility into every message. This matters most for time-critical journeys such as login OTPs, payment confirmations, and transactional banking alerts, where a few seconds of delay directly affects conversion and customer trust.
Our SMPP 3.4 endpoints are engineered for reliability: window-based flow control, automatic reconnection with enquire_link keep-alives, per-bind throughput of up to 5,000 TPS, and full support for Unicode (UCS-2) and concatenated long messages. All traffic is routed through DLT-registered headers and approved content templates, so your SMPP campaigns clear TRAI scrubbing without manual intervention. Whether you are migrating off an unstable route or scaling a new product launch, our team provisions credentials, shares the connection specification, and supports you through binding and load testing.
Frequently Asked Questions
What is SMPP and how is it different from an HTTP API?
SMPP (Short Message Peer-to-Peer) is a binary telecom protocol for exchanging SMS between an application and an SMSC over a persistent TCP session. Unlike an HTTP API, which opens a new connection per request, SMPP keeps one long-lived session open, so it removes handshake overhead and sustains far higher throughput.
What throughput can I expect over SMPP?
Our SMPP 3.4 binds support up to 5,000 messages per second (TPS) per connection, with the ability to add multiple binds for higher aggregate throughput. Actual delivery speed also depends on operator routing and DLT category.
Which SMPP bind types do you support?
We support transmitter (TX), receiver (RX), and transceiver (TRX) binds. TRX is recommended for most enterprises because it sends messages and receives delivery receipts asynchronously over the same session.
Do you support Unicode and long (concatenated) SMS over SMPP?
Yes. We support UCS-2/UTF-8 Unicode for regional languages and concatenated (multipart) SMS via UDH, so long messages and non-Latin scripts are delivered correctly.
Is SMPP connectivity DLT compliant in India?
Yes. All SMPP traffic runs through DLT-registered headers and approved templates. We help enterprises and aggregators complete DLT onboarding so SMPP campaigns pass TRAI scrubbing.
Need High Volume Pricing?
We offer special rates for aggregators and enterprises sending >10 Lakh SMS/month via SMPP.