Specifications

ISU AT Command Reference Introduction
Iridium Proprietary Version 2.45
20 June 2011 4
Mobile Originated (for Short Burst Data)
MOMSN
Mobile Originated Message Sequence Number (for Short Burst Data)
MT
Mobile Terminated (for Short Burst Data)
MTMSN
Mobile Terminated Message Sequence Number (for Short Burst Data)
RI
(V.24 Signal) Ring Indicate. This is a signal from the ISU which indicates that an incoming call is
ringing or that an MT SBD message is present at the ESS.
RP
Relay Protocol (used in SMS).
RTS
(V.24 Signal) Request To Send. This signal is normally used in controlling the flow of data from the
ISU.
SBD
Short Burst Data
SMS
SMS Short Message Service.
SMSSC
Short Message Service - Service Centre (used in SMS).
TP
Transfer Protocol (used in SMS).
XON/XOFF
A standard method of controlling the flow of data to and from a ISU to prevent overflow/overrun
conditions.