2. Mobile Telephony for CERN in the Pays de Gex
Tony Cass — ACCU — 6th September 2016
cern.ch/dpp: Restricted: CERN Internal

3. Orange/Swisscom Status
All Orange transmitters were enabled by Monday 29th August.
Swisscom transmitters in France were shutdown at 2pm on Monday 29th August.
During the rest of that week, Orange
disconnected Swisscom equipment
with some unexpected disruption as the transmitter at point 5 was disconnected on Aug 31st, not Sep 2nd.
adjusted transmitter power settings and antenna configurations to meet their needs.
“Drive by” measurements of signal strengths in the Pays de Gex are being carried out by Orange this week (Sep 6th-8th). These will provide the reference levels for our “service agreement” with Orange.
Mobile Telephony for CERN in the Pays de Gex

4. Mobile Telephony for CERN in the Pays de Gex
Known issues
Phones connected to the wrong network
stuck on Orange, even when there is Swisscom coverage
this depends strongly on how the phone behaves. iPhones switch quickly to Swisscom; more recent Samsung devices stay with Orange.
connected to Swisscom even if the signal strength is too low, so calls are missed.
Again, this partly depends on the behaviour of the phone, but there is a link to our request to have phones connect quickly back to Swisscom to save costs. We are investigating with Swisscom.
Also, Swisscom signals reach France from transmitters in Switzerland. This seems to be a problem around the CCC (from Meyrin/Mategnin) and in Thoiry (from Satigny/Dardagny).
People usually working in France should probably manually connect to Orange, and not roam.
Lack of Orange coverage
Some people in France have no Orange signal, although they do have coverage from another operator, SFR or Bouygues, say.
We still need to understand the overall impact of this. How many people are affected? How many are on a piquet rota?
Calls are shown as being from …76111, not the number of the caller
Unfortunately, the system is “working as designed”, but we are discussing with Swisscom whether there is a way to have the calling number shown.
Mobile Telephony for CERN in the Pays de Gex

5. Mobile routing service
Caller Line ID
Impact of ISDN number verification
extension cannot be verified/trusted
organisation number can be 📱
📱161234
caller: 76111
Orange
caller: 71234
71234
Swisscom mobile
ext: 71234
org: _____
ext: 71234
org: _____
org: 76111
ext: 71234
org: 76111
ext: 71234
org: 76111
ext: 71234
org: _____
CERN
Swisscom
Mobile routing service
ext: 71234
org: _____
ext: 71234
org: _____
LCR Providers 
ext: 71234
org: 76111
ISP 
caller: 71234
or caller: 76111
LCR: least cost routing
CERN routes outgoing calls from fixed-line phones to the company charging the least for that destination.

6. Mobile routing service
Caller Line ID
Impact of ISDN number verification
extension cannot be verified/trusted
organisation number can be 📱
📱161234
caller:
Orange
caller:
71234
Swisscom mobile
caller:
caller:
CERN
Mobile routing service
ext:
org: _____
ext:
org: _____
LCR Providers 
ext:
org: 76111
ISP 
caller:
or caller: 76111
LCR: least cost routing
CERN routes outgoing calls from fixed-line phones to the company charging the least for that destination.