Specifications
ISU AT Command Reference  Phase II AT Commands 
Iridium Proprietary Version 2.45 
20 June 2011     41 
Read Command: +CNMI? 
Read command returns the current settings for the SMS message indication. Response is in the form: 
  +CNMI: <mode>,<mt>,<bm>,<ds>,<bfr> 
Test Command: +CNMI=? 
Test command returns the supported settings of the phone. Response is in the form: 
  +CNMI: (list of supported <mode>s),(list of supported <mt>s),(list 
of supported <bm>s),(list of supported <ds>s),(list of supported <bfr>s) 
6.13  +COPS - Operator Select 
Set Command: +COPS=[<mode>[,<format>[,<oper>]]] 
Set command forces an attempt to manually register the phone to the network. Only IRIDIUM as <oper> 
is supported. 
Valid values for the parameters are outlined below. 
<mode>: 
  0  automatic (<oper> field is ignored) (default) 
  1  manual (<oper> field is optional) 
<format>: 
  0  long format alphanumeric <oper> 
  1  short format alphanumeric <oper> 
  2  numeric <oper> 
<oper> is of string type enclosed by quotes“”; for example “IRIDIUM”. <format> indicates if the format is 
alphanumeric or numeric; long alphanumeric format can be up to 16 characters long and short format up to 
8 characters; numeric format is the Location Area Identification number which consists of a three BCD 
(Binary Coded Decimal) digit country code plus a two BCD digit network code; hence the number has 
structure: (country code digit 3)(country code digit 2)(country code digit 1)(network code digit 2)(network 
code digit 1). Since IRIDIUM is the only operator, the short and long format is “IRIDIUM” and the 
numeric format is “90103”.  These are the only values accepted. 
Note that setting the <mode> to manual does not disable automatic registration of the phone to the network. 
It just forces a manual registration procedure when entered. 
Read Command: +COPS? 
Read command returns the current mode, and will always respond with as “000” for <mode>. This is due 
to the continually enabled nature of the automatic registration mode. The response is in the form: 
  +COPS: <mode> 
For example: 
 +COPS:000 










