SMS Gateway Proxy Key Features

The SMS Gateway Proxy provides a set of core capabilities designed to support high-throughput messaging, flexible routing, and operational reliability.
The platform combines SMPP protocol infrastructure with policy control, traffic management, and observability features required for production messaging environments.

Routing & Traffic Management

• ✅ Multi-ESME routing with dynamic, configuration-driven selection
• ✅ Virtual SMPP pools with weighted load balancing across multiple ESMEs
• ✅ Transparent pool abstraction (pools and single links share the same interface)
• ✅ Weighted traffic distribution using Smooth Weighted Round-Robin
• ✅ High-availability routing through link redundancy and pooling

Policy & Access Control

• ✅ Contact policy enforcement (blacklists, registration filters)
• ✅ Chained contact policies (multiple filters executed in sequence)
• ✅ IP-based access control for SMS submission and routing

Message Processing

• ✅ Flexible encoding support (GSM 7-bit, Latin-1, UCS-2)
• ✅ Automatic message segmentation for long SMS
• ✅ Payload-based message delivery for advanced SMPP modes

Reliability & Delivery

• ✅ Delivery tracking via SMPP delivery receipts (DLRs)
• ✅ Transaction-aware message counting using transaction IDs
• ✅ Health-aware routing based on SMPP link connection state

Observability & Operations

• ✅ Comprehensive monitoring via Prometheus metrics
• ✅ Transaction tracing with UUID-based correlation
• ✅ Persistent message journaling with optional S3 export
• ✅ Per-link and per-pool statistics for operational visibility