GSM Protocol Stack explained Protocol Stack GSM Layer 1 Radio Transmission GSM900 Upstream : 890 ~915 Mhz Downstream : 935 ~ 960 Mhz Duplex Interval : 45 Mhz Bandwidth : 25 Mhz Frequency Interval : 200 Khz TDM / FDMA Modulation – GMSK GSM Layer 2 – Data Link Layer DLL LAPDm Link Access Procedure […]
MSISDN – GSM SIM Card Identifiers
GSM SIM Card Identifiers are codes defined by ETSI standards MSISDN Mobile Subscriber Integrated Service Digital Number is a 10 digits number associated with a country code, this is the client mobile number! The MSISDN can have a maximum of 15 digits but isn’t defined the minimum digits. MSISDN = CC Contry Code + NDC […]
IMEI IMEI-SV , MEID and PEI (5G)
IMEI and IMEI-SV – International Mobile Station Equipment Identity and Software Version Number is a number used to unique identify a terminal (mobile phone) on 3GPP networks and satellite. IMEI As we said all mobile devices must have a IMEI number associated with each To verify your IMEI press *06# on your mobile phone. If […]
Free Diameter PCRF Interfaces List
Understand how Diameter PCRF Interfaces interconnect with other IMS devices. Diameter PCRF
Free Introduction to SS7 Protocol Stack
SS7 Protocol Stack SS7 MTP – Message Transfer Part Components SS7 Message Transfer Part MTP 1 – Layer 1 MTP 1 is the physical interface of SS7 Protocol Stack, here we control the physical and electrical characteristics that make a link between two signaling points. Physical Layer use TDM over E1/T1 Links to transfer the bits converted […]
Diameter Interfaces List : Free Guide
Diameter Interfaces List Diameter Interfaces list Base Protocol – IETF RFC 3588 Interface Network Location Supported version Diameter Commands for 3GPP IETF RFC 3589 Diameter Credit Control App IETF RFC 4006 NASREQ Support for Network Access Server IETF RFC 4005 EAP Support for Extensible Authentication Protocol IETF RFC 4072 Mobile IPv4 Support for Diameter Mobile […]
Amazing Diameter Messages command codes list
Diameter Messages RFC 3588 Diameter Protocol Diameter Credit Control Messages This messages have an application id = 4 Interfaces : Gy / Ro Abort-Session-Request – ASR Code 274 The Abort-Session-Request (ASR), indicated by the Command Code set to 274 and the message flags’ ‘R’ bit set, may be sent by any Diameter server or any […]
Diameter Protocol : Easy understand the basic functionality
Diameter protocol was created on 1998 to be a successor of RADIUS protocol, the main goal was to create a protocol more secure and implemented on signalling network. It can use TCP or SCTP at transport layer and as TLS and DTLS for transport layer security and it has a fail over mechanism using internal […]
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