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Payment Switch Integration

A payment application is only as good as its host connection. We implement ISO 8583 and proprietary switch protocols from spec — byte by byte, robust under real-world network conditions.

What We Deliver

Fluent in ISO 8583 — and Every Dialect of It

Every switch speaks its own version of the standard, and many speak something entirely proprietary. We've integrated enough of them to know where the surprises hide: in the bitmaps, the key ceremonies and the reversal logic.

ISO 8583 messaging (1987 / 1993)Bitmap parsing, message packagers and field-level validation
Proprietary protocols from specImplemented directly from the switch's message specification
SecurityKey exchange, PIN translation, MAC generation and verification
ResilienceStand-in, store-and-forward, timeouts and automatic reversals
Back officeReconciliation, settlement, cutover and dispute support data
Host simulatorsSo development and regression testing never wait on a test host

Plan Your Integration

iso8583 — field map

DE 002  PAN
DE 003  Processing Code
DE 004  Amount, Transaction
DE 011  STAN
DE 022  POS Entry Mode
DE 035  Track 2 Data
DE 039  Response Code
DE 052  PIN Block
DE 055  EMV / ICC Data
DE 064  MAC

Why Deazitech

Integrations That Survive Production

From-Spec Implementation

Hand us the switch's message specification and we'll implement it precisely — no guessing, no "mostly compatible".

Security Done Right

Key ceremonies, PIN blocks and MACs handled with the discipline acquiring banks expect — and auditors verify.

Faster Certification

Clean integrations sail through L3. Pair this service with our L3 testing for a single accountable path to production.