Period
to 24 November 2017

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for ISDN skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited ISDN over the 6 months to 24 November 2017 with a comparison to the same period in the previous 2 years.

Integrated Service Digital Network (ISDN)
Central London > City of London
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 317 337 418
Rank change year-on-year +20 +81 +38
Permanent jobs citing ISDN 9 16 6
As % of all permanent IT jobs advertised in the City of London 0.088% 0.14% 0.035%
As % of the Communications & Networking category 0.60% 0.90% 0.25%
Number of salaries quoted 9 10 6
City of London median annual salary £57,500 £52,500 £55,000
Median salary % change year-on-year +9.52% -4.55% +15.79%
10th Percentile £52,750 £50,750 £51,875
90th Percentile £60,000 £61,125 £58,125
Central London median annual salary £57,500 £52,500 £55,000
% change year-on-year +9.52% -4.55% +15.79%

ISDN is in the Communications and Computer Networking category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for communications or computer networking skills.

All Communications and Computer Networking Skills
City of London
Permanent vacancies with a requirement for communications or computer networking skills 1494 1773 2444
As % of all permanent IT jobs advertised in the City of London 14.62% 15.25% 14.32%
Number of salaries quoted 1340 1555 2098
City of London median annual salary £52,500 £55,000 £52,500
Median salary % change year-on-year -4.55% +4.76% +7.14%
10th Percentile £31,250 £30,750 £27,500
90th Percentile £80,000 £78,750 £78,750
Central London median annual salary £52,500 £52,500 £50,000
% change year-on-year - +5.00% +2.04%

ISDN
Job Vacancy Trend in the City of London

Job postings citing ISDN as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for ISDN in the City of London

ISDN
Salary Trend in the City of London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing ISDN in the City of London.

Salary trend for ISDN in the City of London

For the 6 months to 24 November 2017, IT jobs citing ISDN also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the City of London region with a requirement for ISDN.

1 8 (88.89%) Unified Communications
2 6 (66.67%) SolarWinds
2 6 (66.67%) Cisco CUCM
2 6 (66.67%) Meraki
2 6 (66.67%) XMPP
2 6 (66.67%) Cisco ASA
2 6 (66.67%) WebEx
2 6 (66.67%) ITIL
2 6 (66.67%) DNS
2 6 (66.67%) Cisco
2 6 (66.67%) CCNA
2 6 (66.67%) ITIL Certification
2 6 (66.67%) CheckPoint
2 6 (66.67%) MPLS
2 6 (66.67%) Project Management
2 6 (66.67%) Cisco Certification
2 6 (66.67%) Finance
2 6 (66.67%) CMS
2 6 (66.67%) Blue Coat
3 3 (33.33%) Windows Server
3 3 (33.33%) Skype for Business
3 3 (33.33%) Proactive Monitoring
3 3 (33.33%) Active Directory
3 3 (33.33%) Windows
4 2 (22.22%) Microsoft
4 2 (22.22%) MCSE
4 2 (22.22%) SharePoint
4 2 (22.22%) MS Exchange
4 2 (22.22%) VoIP
4 2 (22.22%) TCP/IP

ISDN
Co-occurring IT Skills in the City of London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 6 (66.67%) CMS
2 3 (33.33%) Skype for Business
3 2 (22.22%) MS Exchange
3 2 (22.22%) SharePoint
4 1 (11.11%) IIS
Communications & Networking
1 8 (88.89%) Unified Communications
2 6 (66.67%) Cisco ASA
2 6 (66.67%) DNS
2 6 (66.67%) MPLS
2 6 (66.67%) WebEx
3 2 (22.22%) Skype
3 2 (22.22%) TCP/IP
3 2 (22.22%) VoIP
4 1 (11.11%) HTTPS
4 1 (11.11%) SAN
Database & Business Intelligence
1 1 (11.11%) OLAP
General
1 6 (66.67%) Finance
2 1 (11.11%) Marketing
Job Titles
1 4 (44.44%) Unified Communications Specialist
2 2 (22.22%) Infrastructure Specialist
2 2 (22.22%) Lync Engineer
2 2 (22.22%) Network Infrastructure Specialist
2 2 (22.22%) Unified Communications Engineer
3 1 (11.11%) Infrastructure Manager
3 1 (11.11%) IT Infrastructure Manager
3 1 (11.11%) IT Manager
3 1 (11.11%) IT Security Manager
3 1 (11.11%) Security Manager
Libraries, Frameworks & Software Standards
1 6 (66.67%) XMPP
Miscellaneous
1 1 (11.11%) Cyber Attack
Operating Systems
1 3 (33.33%) Windows
1 3 (33.33%) Windows Server
2 2 (22.22%) Windows Server 2008
2 2 (22.22%) Windows Server 2012
3 1 (11.11%) Linux
Processes & Methodologies
1 6 (66.67%) ITIL
1 6 (66.67%) Project Management
2 3 (33.33%) Proactive Monitoring
3 2 (22.22%) Customer Requirements
3 2 (22.22%) Network Management
3 2 (22.22%) Presales
3 2 (22.22%) Security Management
4 1 (11.11%) Business Continuity
Programming Languages
1 2 (22.22%) PowerShell
2 1 (11.11%) C#
2 1 (11.11%) SQL
Qualifications
1 6 (66.67%) CCNA
1 6 (66.67%) Cisco Certification
1 6 (66.67%) ITIL Certification
2 2 (22.22%) MCITP
2 2 (22.22%) MCSE
2 2 (22.22%) Microsoft Certification
Quality Assurance & Compliance
1 1 (11.11%) ISO/IEC 27001
System Software
1 3 (33.33%) Active Directory
Systems Management
1 6 (66.67%) Cisco CUCM
Vendors
1 6 (66.67%) Blue Coat
1 6 (66.67%) CheckPoint
1 6 (66.67%) Cisco
1 6 (66.67%) Meraki
1 6 (66.67%) SolarWinds
2 2 (22.22%) Microsoft
3 1 (11.11%) Apple
3 1 (11.11%) Avaya
3 1 (11.11%) NetApp