I do a fair bit with iridium
sbd , and I beleive inreach is using iridiums sbd service
Other then a fully provisioned voice service
,iridium does not in effect connect directly from sat device to end user. The message is loaded into the inreach and transferred to the iridium
ground station and onwards to the VAR ( delorme ) and ONLY the Var as a email
with the message as a binary MIME attachment.
What ever service you see is then a function of the VARs system software
In inreach I beleive delorme unpack the email
, and send it via the SMS gateway, so that it " looks" like a text message. BUT it's not a end to end text message like in cellular phones.
Hence you cannot arbitrary send texts from a land based phone
to an inreach ( because the inreach does not have a telephone number , in effect )
Email can be two way, but I beleive delorme do not allow it to prevent spam , correction , email is pseudo two way, again you cannot email the device directly , only via the VARs gateway. , equally delorme " could " provide pseudo two way transparent SMS, but it requires either provisioning
expensive trans national numbers, establishing a raft of local country numbers or , selected gateway systems. None of which it really does.
The text feature in a fully voice provisioned iridium phone
is two way exactly like cellular phones, this is because the voice SIM gives you a fully provisioned international 08816 number . Costs to text that number vary dramatically around the world, so many voice VARs have set up email to SMS gateways or other local systems to avoid such high costs
Sent from my iPad