Participant
the ussd-ms channel
platform domains
external suites
Holder
a feature phone, *555#
Agent and point of sale
the *556# desk
Broker console
live sessions and holds
UniFin platform
ussd-ms, domains, FIX 4.4
Solid arrow: a session step · Dashed: messages, menu branches and control notes
start
1
Dial *555# and PIN
any phone;5 misses = 30 min block
2
The ussd-ms session
MSISDN binding check,the *555# menu
3
Command parsing
command priority,limits and anti-fraud
4
The order: FIX 4.4
trading-ms: limits,the collar, statuses
5
The exchange:execution
the status returns inthe same session step
6
The receipt:flash and SMS
the session and orderjournal for five years
done
menu branches of *555#
Money
payment-ms: the money port
idempotency per session operation
Mobile wallets and payment services
reconciliation of unknown outcomes
Top-up, reconciliation, a receipt
agent floats stay visible to the desk
Quotes and alerts
market-data-ms: quotes and depth
an answer on one session screen
Alerts *555*6*
notification-ms: flash and SMS
A screen inside the menu
the SMS twin without a session
The AI layer
Free text and voice (IVR 5557)
intent parsing
An intent with a read-back
a hint for the next step
The PIN confirmation in session
a person approves the order
Access control
The MSISDN binding lives outside USSD: the participant webdesk or an office; a fresh binding sits in quarantine.
Risk control
An anti-fraud hold: SIM-swap signs or an unusual size pass thesession to the broker desk before it proceeds.
Threshold control
Above the threshold the operation steps up to a one-time codethrough confirmation-ms; money steps fail closed.