sms can do what?
TRANSCRIPT
SMS CAN DO WHAT?
HISTORY
▸ 1st Message Christmas 1992
▸ At first Mobile Terminate (MT) Only
▸ X Network not till 1998 in UK
WHAT
▸ Short Message Service (SMS)
▸ 140 byte payload sent between a Mobile Station (MS) and an Short Message Service Centre (SMSC)
▸ Uses the Telecom Network signalling channels (SS7)
▸ Messages are Store and Forward in the SMSC
ON NETWORK
SMSC
MSC
MS
BSS
HLR
MSC
MS
BSS
MO_FSM
SRI_SM
ack
RESP
MT_FSM
ack
CROSS NETWORK
SMSC
MSC
MS
BSS
HLR
MSC
MS
BSS
MO_FSM
SRI_SM
ack
RESP
MT_FSM
ack
SO HOW TO COMPANIES LIKE NEXMO CONNECT? (NO WE DON’T HAVE HUGE BANKS OF
HANDSETS!)
APPLICATION ORIGINATED
SMSC
HLR
MSC
MS
BSS
SRI_SM
RESP
MT_FSM
ack
submit_sm
deliver_sm
SMPP
WHY NEXMO
▸ 0-hop to around 650 Networks (ie 50%) through 49 local direct connections and 20+ SS7 Carriers
▸ 82 Local Gateways
▸ 100+ Aggregators
▸ Global Outbound Voice supported via Tier 1 connectivity
▸ 30 Phone Number SMS & Voice providers & carriers
▸ 12 Mobile Number Portability Dips
▸ 10 SS7 Carriers for Number Insight
OK, ON TO THE FUN STUFF
BASIC SMS
▸ 160 characters of Text
▸ Sent in the GSM 7bit alphabet
▸ To a Virtual Mobile Number
HELLO
07520 619 007
UNICORNS UNICODE
▸ 140 Bytes
▸ Unicode is 16bit
▸ So only 70 characters per SMS
▸ One unicode char makes whole message unicode
EMOJI
07520 619 007
LONG MESSAGES - CONCATENATION
▸ 6 Octet Overhead
▸ 153 characters per SMS (134 octets)
▸ All messages received at handset before displayed
▸ Max number of SMS varies, 256 in theory
LONG
07520 619 007
556 Char 4 SMS
FLASH
▸ Message appears full screen
▸ iPhone doesn’t save to inbox
▸ Sender ID may/may not be visible
FLASH
07520 619 007
VOICEMAIL
▸ Message Waiting Indicator
▸ Binary SMS that has info in the User Data Header (UDH)
▸ Sender ID may/may not be visible
VOICEMAIL
07520 619 007
CLEAR VOICEMAIL
▸ Just set message count to zero!
CLEAR
07520 619 007
REPLACEMENT SMS
▸ Can “overwrite” a previous message
▸ Set replacement PID on the 1st message
SHOW
07520 619 007
REPLACEMENT SMS
▸ Can “overwrite” a previous message
▸ Set same PID on the 2nd message
REPLACE
07520 619 007
