SMS How it works
SMS How it works
When we receive SMS / MMS from mobile phones (mobile originated), the message is not sent directly to the destination mobile phone (mobile terminated), but sent in advance to the SMS Center (SMSC) which normally resides in the office telephone operator, then the message forwarded to the destination mobile phone.
With the SMSC, we can know the status of SMS messages that were sent, whether they have been through or fail.
If the destination mobile phone is switched on and can receive SMS messages sent, it sends back a confirmation message to the SMSC which states that the message has been received, then the SMSC sends back status to the sender. If the destination mobile phone is turned off, the messages we send will be stored in the SMSC samapai validity period is met.
Validity period is given a grace period means that the sender until the message can be received by the recipient. This can be set on our cell phones, ranging from 1 hour to more than 1 day. Every second of it, we phone tower exchange information with the sender of data packets to ensure that everything runs as it should.
Our phones also use the control channel to set-up an incoming call. When someone tries to call us, the tower will send a message to the control channel, so that the phone will memeinkan ringtones. When someone sends an SMS, SMS will flow via the SMSC, to the towers, and towers will send a message to our cell phones as data packets on the control channel.
In the same way, when we send an SMS, the phone will send it to the tower on the control channel and the message is sent memalui tower to the SMSC to the destination phone.
SMS then developed into Enhaced Message Service, which with EMS the number of characters that can be delivered in 1 SMS are becoming more and can also be used to send a message of non-characters (can contain simple pictures).
In EMS, for sending messages over 160 characters, it will be split into several pieces, which each consist of not more than 160 characters. For example, messages that dikirmkan consists of 167 characters, then this message will be split into 2 pieces of SMS (1 SMS with 160 characters and 1 SMS with 7 characters).
Both these SMS will dikirmkan as two separate SMS and on the receiver will be combined into a single SMS again. In addition, EMS also allows perngiriman simple image data and voice recording.
Apparently, the workings of SMS is not as easy as it seems, SMS does not directly get to the destination phone, but through a series of processes up to SMS it gets to the destination phone.
