Enterprise SMPP SMSC Gateway

Who it is for

• SMS aggregatorsMany customer binds routed across supplier SMSCs.
• Banks and fintechDedicated binds for OTP and transactional alerts with enforced delivery reports.
• ResellersTheir own customers, routes and reports, isolated from other tenants.
• MVNO and operator enterprise unitsSelling A2P access to businesses in front of an operator SMSC.

Customer accounts and SMPP access

• ESME accounts with system ID and password, source-IP allow-lists, dedicated ports and expiry dates.
• Bind modes TX, RX and TRX, with bind status monitoring and manual bind, unbind and rebind.
• Multi-tenancy with per-user policies and reports, and separate admin (reseller) and user roles.
• Account blocking and unblocking, and activity logs for every user.

Upstream SMSCs and routing

• Multiple upstream SMSC connections, each with its own TON/NPI settings (source and destination), enforced or default.
• Delivery report enforcement and throughput (TPS) limits per connection.
• SMSC groups with percentage-based traffic distribution and load balancing.
• Routing by country, operator, prefix, sender and account.
• HLR-assisted routing through a designated lookup connection, to send each number to its current network.
• Automatic failover, and traffic holding when delivery quality drops below policy.

Submission to delivery

1. Bind. The customer binds with system ID, password, an allowed source IP and its dedicated port.
2. Account checks. Each submit_sm is checked against the account's throughput, expiry and security profile.
3. ESME firewall. Sender, content, prefix, regular-expression, OTP and AI-assisted rules allow or block the message.
4. Route. The routing engine picks a route by country, operator, prefix, sender or account, optionally after an HLR lookup, then an SMSC within the group by percentage.
5. Submit upstream. The message goes to the chosen SMSC with enforced TON/NPI and delivery report settings, and its status is tracked.
6. Watch quality. Delivery and failure ratios are compared with thresholds; alerts fire and traffic can be held automatically.
7. Recover. Failed traffic is rerouted or resent by message ID range, user, date, country, operator, error or status.

Embedded ESME firewall

Every submission passes through a firewall before it is routed:

• Sender, content and prefix rules with allow or block actions, at global and per-user level.
• Regular-expression and multilingual keyword filters.
• OTP spam protection: limits on repeated OTPs by message count, time window, share of distinct destinations and block duration.
• International sender ID restrictions and detection of sender ID variations.
• Controls for promotional and political content, and spam and phishing filtering.
• AI-assisted content classification, with a verified-content level set per user.
• HLR verification enabled per account.

Operators that want the same controls in front of their own SMSC can use our SMPP firewall.

Supported protocols and interfaces

Protocol or interface	Used for	Availability
SMPP v3.4	Customer binds and upstream SMSC connections	Core
HTTP / REST	Submission, delivery report callbacks, administration	Core
HLR lookup	Routing verification through a designated connection	Core
Email, SMS, webhooks	Alerts	Core
SMPP over TLS	Encrypted binds	Per deployment
SMPP v5.0	Where the peer supports it	Per deployment

Monitoring, alerts and reports

• Dashboards for submitted, processed, delivered, pending, failed and blocked messages, with SMSC and user error breakdowns.
• Delivery-rate alerts by SMSC, operator and sender, with minimum submission counts and observation windows, sent by email, SMS or webhook.
• Delivery summaries including firewall and AI blocks.
• Detailed reports by user, date, destination, message ID, SMSC and rule, exported as CSV, PDF or Excel.

High availability and scaling

Gateway nodes run redundantly, and SMSC groups provide supplier redundancy with automatic failover and traffic holding. Capacity grows by adding gateway nodes, and multi-tenant partitioning keeps resellers separate.

Deployment

Linux on bare metal, virtual machines or cloud; standalone, or in front of our Operator SMSC; hosted or managed options are available. Billing and reconciliation exports can be customised by our engineering team.

Use cases

• Aggregator hub: hundreds of customer binds routed across supplier SMSCs, with percentage distribution, quality monitoring and automated resends.
• Bank OTP delivery: dedicated binds with enforced delivery reports, HLR-assisted routing and repeated-OTP protection.
• Reseller platform: admin accounts manage their own users, routes and reports in isolation.
• MVNO enterprise messaging: the gateway fronts the Operator SMSC so business customers connect over SMPP under policy.

What it does not do

The gateway does not terminate SS7/MAP signaling. Delivery to mobile networks is done by the Operator SMSC or by upstream suppliers.