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Essential IMS

A 2 day training course
**Due to the current COVID-19 isolation rules all our courses are being delivered via virtual instructor led learning until further notice**

Essential IMS training course description

The IP Multimedia Core Network Subsystem (IMS) is defined by 3GPP as a new mobile infrastructure. This course studies the discreet elements in the IMS.

Key outcomes from this course

By the end of the course delegates will be able to:
  • Describe the IMS.
  • Describe the IMS architecture.
  • Explain how charging, security and QoS is handled in the IMS.
  • Explain how the IMS supports service enablers such as Push to talk and Presence.

Essential IMS training course details

Who will benefit:
Telecommunications staff.
Mobile communications overview
2 days

Training approach

This structured training course seeks to build upon workbook learning through the use of group exercises, dynamic discussion and individual tasks in order to deliver an engaging and interactive module that will ensure all candidates are able to transfer their new skills into the workplace.

Overall rating:

Customer review

"Hard concepts were explained very simply."
J. S. Framestore CFC
"Excellent presentation - very good course structure."
B. M. London Internet Exchange

Essential IMS training course contents

Mobile communications review
The role of IP in telecommunications. GSM to IMS. Enhanced multimedia services, Push To, convergence, conferencing, roaming.

What is IMS?
What it is, why IMS, standard bodies: 3GPP, IETF, OMA, IMS services. MMD comparison.

IMS architecture blocks
Overview, IMS functions, IMS interfaces, IMS protocols, IMS elements, IMS reference points. Access network, IMS in GSM, CDMA, WiFi & PSTN networks. Core network. Application, Control and Call planes.

HSS – User database
Identification. The user database, role of HSS, SLF and multiple HSSs. “Normal” identities, IMPI, IMPU.

IMS signalling: SIP
What is SIP? SIP URI, contact address, UAs, Proxies, basic SIP call flow, SIP sessions.

IMS other protocols
Megaco, Diameter, XML, XCAP, COPS, RTP/RTCP, SDP, H.324M, IM and MSRP.

Call/Session Control
Call Session Control Functions (CSCF). Domains. Home networks, visited networks. CSCF and SIP. P-CSCF, P-CSCF discovery, P-CSCF functions. I-CSCF, DNS and I-CSCF. S-CSCF, S-CSCF functions, ENUM lookups. QoS. Example call flows.

IMS services
Open service platform, Application Servers, profiles, AS interface with S-CSCF. “Normal” services (Caller ID, Call waiting, transfer…) Push to talk Over Cellular (PoC), IMS conferencing, Group management, IMS Presence, IMS Messaging. Other possible applications. Media servers. (MRFC, MRFP).

IMS PSTN procedures, BGCF, PSTN interface. SGW, MGCF, MGW

Architecture, Offline, online and flow based charging, charging reference points, CCF, DIAMETER, ICID, IOI.

IMS security
IMS security architecture, identities, AAA, public and private user ID, service filters, Cx interface, RADIUS, Diameter protocol, 3GPP AKA, integrity, privacy, NDS, IPSEC, trust, assertion.

Why Choose Us

SNT trainers score an average of over 90% on the three main areas of:
  • Ability to teach
  • Technical knowledge
  • Answering questions
“Excellently presented by a very knowledgeable and enthusiastic trainer.” P.D. General Dynamics

We limit our maximum class size to 8 delegates; often we have less than this. This ensures optimal interactivity between delegates and instructor.
"Excellent course. The small class size was a great benefit…" M.B. IBM

We write our own courses; courseware does not just consist of slides and our slides are diagrams not bullet point text. A typical chapter provides clearly defined objectives with a chapter overview, slides with text underneath, a quiz at the end to check the learning of the students. Hands on exercises are at the end and are used to reinforce the theory.

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