SMPP v5 Connectivity
— Direct SMS Gateway Integration
for Korea and Global
Enterprise SMPP connectivity with direct carrier interconnections to SKT, KT, and LG U+ — high throughput, real-time delivery receipts, and no third-party hub routing.
What is SMPP?
SMPP (Short Message Peer-to-Peer) is the industry-standard protocol for connecting enterprise messaging platforms, CPaaS providers, SMS aggregators, and mobile carriers.
SureM provides enterprise SMPP connectivity for businesses delivering high-volume SMS traffic into Korea through direct carrier infrastructure, real-time delivery receipts, and scalable messaging performance.
SureM is the enterprise SMPP gateway for businesses connecting to Korea.
Why choose SureM SMPP?
SureM contributed to the development of the SMPP standard and operates SMPP v5 with direct carrier interconnections to SKT, KT, and LG U+ — enabling Korea-bound SMS delivery without third-party hub routing. Most international SMPP providers route Korean traffic through intermediary nodes, increasing latency and reducing delivery rates. SureM's direct interconnection eliminates this bottleneck, supporting throughput of 10,000+ messages per second.
SMPP vs HTTP API
| Feature | SMPP | HTTP API |
|---|---|---|
| Connection | Persistent | Stateless |
| TPS | Very High | Medium |
| Delivery receipt | Real-time | Callback |
| Best for | Aggregators | SaaS |
| Scalability | Excellent | Good |
Core specifications
dev team to confirm
dev team to confirm
Connection parameters
| Parameter | Value |
|---|---|
| Host | smpp.surem.net (or actual host — dev team to confirm) |
| Port | 2775 (standard) or actual port |
| System ID | Provided after account issuance |
| Password | Provided after account issuance |
| System type | (if applicable) |
| Enquire link interval | (recommended value) |
Technical specification
| Version | Encoding | TLS | Throughput | DLR | Timeout | Window Size | Reconnect |
|---|---|---|---|---|---|---|---|
| SMPP v5 | UCS-2 / KSC5601 | (confirm) | 10,000+ TPS | Real-time | (confirm) | (tuned per account) | Auto |
Supported operations
| Operation | Purpose |
|---|---|
bind_transmitter | Open a transmit-only session |
bind_receiver | Open a receive-only session |
bind_transceiver | Open a combined send/receive session |
submit_sm | Submit an outbound message |
deliver_sm | Receive inbound messages and delivery receipts |
enquire_link | Keep the session alive |
unbind | Close the session |
MM4 / MM7 interfaces
For application-to-person MMS delivery through operator MMSCs.
What is MM7?
MM7 is the interface between a Value Added Service Provider (VASP) and an MMSC. It is used for enterprise applications to submit MMS messages to an operator's MMSC for delivery to mobile subscribers.
- ✓Based on SOAP over HTTP
- ✓Used for application-to-person (A2P) MMS delivery
- ✓SureM supports MM7 v5.3.0 and v6.8.0 (supported versions — dev team to confirm)
Connection flow
Architecture
Use cases
API example
# Bind example bind_transceiver{ system_id: "YOUR_SYSTEM_ID", password: "YOUR_PASSWORD", system_type: "", interface_version: 0x34 } # Submit submit_sm{ source_addr: "SureM", destination_addr: "+819012345678", short_message: "Your verification code is 483920.", data_coding: 0x08 # UCS-2 } # Delivery receipt (deliver_sm) deliver_sm{ message_state: DELIVERED, receipted_message_id: "..." }
Trusted infrastructure
Frequently asked questions
What SMPP version does SureM support?
SureM supports SMPP v5, with backward compatibility for SMPP v3.4. Both bind_transmitter (outbound only) and bind_transceiver (two-way) connection modes are available. SureM contributed to the development of the international SMPP standard and operates SMPP v5 with direct carrier interconnections to South Korea's three major operators — SKT, KT, and LG U+ — enabling Korea-bound SMS delivery without third-party hub routing.
Does SureM SMPP support TLS encryption?
SureM SMPP connectivity is available over TCP/IP. For enterprise clients requiring encrypted transport, please contact SureM's technical team to confirm TLS availability and configuration requirements for your integration. (TLS support status — dev team to confirm)
What is the throughput limit for SureM SMPP connections?
SureM's SMPP gateway supports throughput of 10,000+ messages per second across its carrier network. Per-connection throughput limits (messages per second, or MPS) are configured based on your account plan and traffic volume. High-volume enterprise clients can request dedicated throughput allocation. Contact SureM's technical team for throughput configuration specific to your use case.
How do I get SMPP credentials from SureM?
SMPP credentials — including host address, port, System ID, and password — are issued after account setup and agreement signing. To get started:
- Contact SureM via intlsales@surem.com or +82-1588-4640
- Complete account registration and service agreement
- Receive SMPP credentials and technical onboarding documentation
- Connect to SureM's SMPP gateway using your System ID and password
SureM's technical team provides 1:1 onboarding support for SMPP integration, including bind configuration, encoding setup, and delivery report handling.
Can I use SureM SMPP to send SMS to Korean numbers (SKT, KT, LG U+)?
Yes. SureM operates direct SMPP interconnections with SKT, KT, and LG U+ — South Korea's three major mobile carriers. Most international SMPP providers route Korean traffic through intermediary nodes, increasing latency and reducing delivery rates. SureM's direct interconnection eliminates this bottleneck and integrates Korea's NPDB (Number Portability Database) for accurate delivery to ported numbers, regardless of which carrier the subscriber originally registered with.
What is the difference between SMPP and REST API for SureM integration?
Both integration methods connect to SureM's messaging infrastructure, but are suited to different use cases:
- SMPP v5: Persistent TCP/IP connection optimized for high-volume, low-latency messaging. Best for CPaaS platforms, SMS aggregators, and enterprise systems sending 10,000+ messages per second. Requires SMPP protocol implementation on the client side.
- REST API: Stateless HTTP-based integration, easier to implement and suitable for most web and app backends. Best for standard enterprise messaging volumes, OTP delivery, and transactional notifications. Supports JSON request/response format.
For most enterprise clients, REST API is sufficient and faster to integrate. SMPP is recommended for high-throughput platform-to-platform (P2P) integration or when existing systems already use SMPP.
What is MM4 and MM7, and does SureM support both?
MM4 and MM7 are MMS-specific interfaces used for enterprise multimedia message delivery:
- MM4 is the interface between two MMSCs (Multimedia Messaging Service Centers), used for carrier-to-carrier MMS routing. SureM supports MM4 for inter-carrier MMS delivery.
- MM7 is the interface between a Value Added Service Provider (VASP) and an MMSC, used for application-to-person (A2P) MMS delivery. It is based on SOAP over HTTP and is the standard method for enterprise applications to submit MMS messages to a carrier's MMSC. SureM supports MM7 v5.3.0 and v6.8.0 (supported versions — dev team to confirm)
SureM supports both MM4 and MM7 interfaces for enterprise MMS integration. Contact SureM's technical team for MM4/MM7 configuration documentation.
Related
Connect to Korea over SMPP
Talk with SureM's integration engineers about SMPP v5, throughput, and direct carrier routing.
SureM is a Korea-based business messaging infrastructure provider with 26 years of experience. SureM helps global messaging partners, foreign-invested companies in Korea, and Korean enterprises deliver SMS, LMS, MMS, RCS, Kakao, WhatsApp Business, Voice OTP, and international messages through reliable local network connectivity and global messaging reach.