Entries Tagged 'Technical' ↓

SMS contains two basic point-to-point services. They are:

MO – Mobile originated short message

MT – Mobile terminated short message

When you send an SMS, Mobile-originated (MO) short messages are transported from the MO-capable handset to the SMSC and can be destined to other mobile subscribers or for subscribers on networks such as GSM, CDMA, Paging Networks and Internet Protocol.

Mobile-terminated (MT) short messages are transported from the SMSC to the handset and can be submitted to the SMSC by other mobile subscribers via MO-SM. For MT, a report is always returned to the SMSC either confirming the short message delivery to the handset or informing the SMSC of the short message delivery failure and identifying the reason for failure (error code). Sometimes when SMSC doesn’t receives the report of delivering, it keeps sending the SMS again and again. Continue reading →

Technorati Tags: GSM, MO, MT, SMS, SMSC

Yes, there is an answer to that question! It might just surprise you that the reason for having 160 characters ( letters) in one SMS is not about any big technical issue, but just a matter of choice or opinion!

Friedhelm Hillebrand, who was chairman of nonvoice services committee within the Global System for Mobile Communications (GSM), had decided that they would use control channel in its idle time to transmit few text messages between subscribers in 1985. Why he decided that way is an interesting story, but that is how we now have 160 characters in one SMS!
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Technorati Tags: cdma, global system for mobile, GSM, SMS, sms length, text message

SMS works in different layers to finally reach users handset. The SMSC (Short Message Service Center) which does the job of saving and forwarding of SMS to and from the mobile station entirely. From a handset the SMS reaches at the SME (Short Message Entity) which is located in a mobile station receives and sends short messages.

The SMS GWMS (SMS gateway MSC) is a gateway MSC which is a mobile network’s point of contact with other networks. A Gateway MSC also can receive SMS. On receiving the short message, GMSC uses the network to check the current position of the mobile station form the home location register (HLR).

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Technorati Tags: GPrS, GSM, HLR, MAP, MSC, SMS, SMSC, SS7, UMTS, VLR