# Fixed telephony evolution at CERN

- Institution: CERN
- Department: IT Technical Forum (ITTF)
- Speaker: Francisco VALENTIN VINAGRERO
- Year: 2015
- Language: English
- Subjects: Biology
- Source: [CERN](https://videos.cern.ch/record/3007260)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The heart of CERN's telephony infrastructure consists of the Alcatel IP-PBX that links CERN's fixed line phones, Lync softphones and CERN's GSM subscribers to low-cost local and international telephony services. The PABX infrastructure also supports the emergency "red telephones" in the LHC tunnel and provides vital services for the Fire and Rescue Service and the CERN Control Centre. Although still reliable, the Alcatel hardware is increasingly costly to maintain and looking increasingly outmoded in a market where open source solutions are increasingly dominant.

After presenting an overview of the Alcatel PABX and the services it provides, including innovative solutions such as the Closed User Group for our mobile telephony services, we present a possible architecture for a software based system designed to meet tomorrow's communication needs and describe how the introduction of open-source call routers based on the SIP protocol and Session Border Controllers (SBC) could foster the introduction of new services and increase the agility of our telephony network to adapt to new communication standards..

0:00:00 Slide 1

0:00:27 Slide 2

0:00:53 Slide 3

0:01:17 Slide 4

0:02:18 Slide 5

0:02:38 Slide 6

0:02:47 Slide 7

0:03:31 Slide 8

0:03:51 Slide 9

0:05:15 Slide 10

0:06:20 Slide 11

0:06:55 Slide 12

0:09:30 Slide 13

0:10:32 Slide 14

0:10:47 Slide 15

0:10:51 Slide 16

0:11:03 Slide 17

0:11:17 Slide 18

0:11:41 Slide 19

0:11:48 Slide 20

0:12:10 Slide 21

0:12:26 Slide 22

0:12:35 Slide 23

0:12:44 Slide 24

0:12:51 Slide 25

0:13:01 Slide 26

0:14:26 Slide 27

0:15:37 Slide 28

0:18:05 Slide 29

0:18:41 Slide 30

0:19:24 Slide 31

0:19:35 Slide 32

0:19:42 Slide 33

0:19:49 Slide 34

0:20:04 Slide 35

0:20:57 Slide 36

0:21:11 Slide 37

0:21:45 Slide 38

0:22:12 Slide 39

0:22:31 Slide 40

0:24:26 Slide 41

0:24:36 Slide 42

0:24:51 Slide 43

0:25:01 Slide 44

0:25:07 Slide 45

0:25:21 Slide 46

0:25:31 Slide 47

0:25:40 Slide 48

0:25:46 Slide 49…

## Lectures

1. [Fixed telephony evolution at CERN](https://invisiblenetwork.ai/learn/cern/3007260/dcee4a8bdcc1), 44 min (CERN's player)