Business communications
SMS and A2P communications for business
Practical resources about enterprise SMS, A2P messaging, SMPP, transactional notifications and omnichannel communications.
This hub brings together guides on selecting an SMS platform, connecting APIs and SMPP, integrating notifications with business systems and designing reliable message delivery workflows.
The materials help teams evaluate architecture, throughput and security requirements before launching an integration.
Topic materials
SMS & A2P
Reliable SMPP sessions: bind, enquire_link, reconnect and windowing
Design a resilient SMPP connection with bind_transceiver, enquire_link, response timeouts, jittered reconnects, request windows, sequence numbers and duplicate control.
SMS route failover: a cascade without duplicates or delay
How to design SMS route failover: failure criteria, TTL, circuit breakers, idempotency, duplicate prevention, sender compatibility and cascade testing.
Reliable SMS status webhooks: signatures, retries and idempotency
How to receive SMS status events without loss or duplication: request signing, idempotency, retries, event ordering, dead-letter queues and reconciliation.
SMS throughput planning: TPS, queues and priority traffic
How to plan SMS throughput using segments, TPS and drain time; isolate OTP from campaigns; apply backpressure and validate capacity with a realistic load test.
SMS deliverability: DLR, latency and quality metrics
How to measure SMS delivery correctly: DLR states, P50/P95/P99 latency, delivery within target, conversion, failure causes and route reporting.
SMS OTP delivery: TTL, retries and fraud controls
How to design one-time-code delivery over SMS: expiry, attempt limits, idempotency, resend rules, delivery reports and fallback channels.
SMS segmentation: GSM-7, Unicode and actual message length
How encoding affects SMS length and cost: GSM-7 and Unicode limits, concatenated messages, extended characters, template validation and segment monitoring.
Transactional outbox for SMS: avoiding lost notifications and duplicates
Connect a business transaction to SMS submission with an outbox: table design, workers, idempotency keys, retries, deduplication, DLQ and status reconciliation.
Omnichannel transactional notifications without duplicates
How to design transactional notifications with a common event model, SMS/push/email priorities, TTL, channel fallback, deduplication and status handling.
SMPP vs HTTP API for SMS: choosing an integration protocol
A practical comparison of SMPP and HTTP APIs for SMS, covering throughput, latency, delivery receipts, retries, security and selection criteria.
How to choose an SMS platform for transactional notifications
How to choose a transactional SMS platform: delivery speed, SMPP/HTTP, CRM integrations, resilience, reporting and compliance.
What is A2P SMS and why business needs it
A2P SMS in plain words: how it differs from ordinary messaging, what tasks it solves, which protocols it uses and how to choose an operator for business.
Integrating SMS notifications with 1C and Bitrix24
How to automate SMS from 1C, Bitrix24 and other business systems using connectors or APIs, with common mistakes and a launch checklist.