Period
to 24 March 2019

The following table provides summary statistics for permanent job vacancies advertised in 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 March 2019 with a comparison to the same period in the previous 2 years.

Integrated Service Digital Network (ISDN)
England > London
6 months to
24 Mar 2019
Same period 2018 Same period 2017
Rank 748 791 781
Rank change year-on-year +43 -10 +54
Permanent jobs citing ISDN 23 48 55
As % of all permanent IT jobs advertised in London 0.038% 0.069% 0.080%
As % of the Communications & Networking category 0.29% 0.47% 0.50%
Number of salaries quoted 16 34 29
London median annual salary £42,500 £57,500 £55,500
Median salary % change year-on-year -26.09% +3.60% +5.71%
10th Percentile £32,500 £29,700 £37,450
90th Percentile £65,000 £67,500 £65,000
England median annual salary £40,500 £45,000 £47,500
% change year-on-year -10.00% -5.26% +18.75%

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 London with a requirement for communications or computer networking skills.

All Communications and Computer Networking Skills
London
Permanent vacancies with a requirement for communications or computer networking skills 7,984 10,134 10,893
As % of all permanent IT jobs advertised in London 13.04% 14.52% 15.80%
Number of salaries quoted 6,503 8,474 9,207
London median annual salary £55,000 £55,000 £55,000
10th Percentile £29,750 £31,250 £30,000
90th Percentile £85,500 £82,500 £80,000
England median annual salary £47,500 £46,000 £45,000
% change year-on-year +3.26% +2.22% -

ISDN
Job Vacancy Trend in London

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

Job vacancy trend for ISDN in London

ISDN
Salary Trend in London

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

Salary trend for ISDN in London

ISDN
Salary Histogram in London

The salary distribution of IT jobs citing ISDN in London over the 6 months to 24 March 2019.

Salary histogram for ISDN in London

ISDN
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing ISDN within the London region over the 6 months to 24 March 2019. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Central London +49 4 £35,000 -12.50% 1
South London +6 2 £28,500 -1.72%
ISDN
England

For the 6 months to 24 March 2019, IT jobs citing ISDN also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the London region with a requirement for ISDN.

1 18 (78.26%) Cisco
2 13 (56.52%) Firewall
3 12 (52.17%) VoIP
3 12 (52.17%) ITIL
3 12 (52.17%) CheckPoint
3 12 (52.17%) Cisco CUCM
4 11 (47.83%) DNS
4 11 (47.83%) SQL
4 11 (47.83%) Microsoft
4 11 (47.83%) Blue Coat
5 10 (43.48%) Video Conferencing
5 10 (43.48%) VMware
5 10 (43.48%) TCP/IP
5 10 (43.48%) LAN
5 10 (43.48%) WAN
5 10 (43.48%) SAN
5 10 (43.48%) VMware Infrastructure
6 9 (39.13%) PowerShell
6 9 (39.13%) Amazon AWS
6 9 (39.13%) Citrix
6 9 (39.13%) Active Directory
6 9 (39.13%) Internet
6 9 (39.13%) DHCP
6 9 (39.13%) Ethernet
6 9 (39.13%) Web Services
6 9 (39.13%) SQL Server
6 9 (39.13%) IIS
6 9 (39.13%) Windows
6 9 (39.13%) XenApp
7 8 (34.78%) H.323

ISDN
Co-occurring IT Skills in 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 9 (39.13%) IIS
2 7 (30.43%) Exchange Server 2013
3 5 (21.74%) MS Exchange
4 4 (17.39%) Skype for Business
5 3 (13.04%) Exchange Server 2007
6 2 (8.70%) CMS
6 2 (8.70%) Exchange Server 2010
7 1 (4.35%) SharePoint
Applications
1 1 (4.35%) Microsoft Office
1 1 (4.35%) MS Visio
Cloud Services
1 9 (39.13%) Amazon AWS
2 3 (13.04%) Microsoft Azure
3 2 (8.70%) Azure Active Directory
3 2 (8.70%) IaaS
3 2 (8.70%) Office 365
4 1 (4.35%) Slack
Communications & Networking
1 13 (56.52%) Firewall
2 12 (52.17%) VoIP
3 11 (47.83%) DNS
4 10 (43.48%) LAN
4 10 (43.48%) SAN
4 10 (43.48%) TCP/IP
4 10 (43.48%) WAN
5 9 (39.13%) DHCP
5 9 (39.13%) Ethernet
5 9 (39.13%) Internet
6 8 (34.78%) H.323
7 7 (30.43%) MPLS
7 7 (30.43%) Wireless
8 6 (26.09%) PSTN
8 6 (26.09%) Unified Communications
9 4 (17.39%) Cisco ASA
9 4 (17.39%) Skype
10 3 (13.04%) ADSL
10 3 (13.04%) BGP
10 3 (13.04%) VPN
Database & Business Intelligence
1 9 (39.13%) SQL Server
2 7 (30.43%) SQL Server 2008
2 7 (30.43%) SQL Server 2012
3 4 (17.39%) SQL Server 2014
3 4 (17.39%) SQL Server 2016
4 3 (13.04%) SQL Server 2005
General
1 3 (13.04%) Finance
1 3 (13.04%) Multimedia
2 2 (8.70%) Telecoms
Job Titles
1 8 (34.78%) Analyst
2 7 (30.43%) Infrastructure Analyst
2 7 (30.43%) Infrastructure Support
2 7 (30.43%) Infrastructure Support Analyst
2 7 (30.43%) IT Analyst
2 7 (30.43%) IT Infrastructure Analyst
2 7 (30.43%) IT Support
2 7 (30.43%) IT Support Analyst
2 7 (30.43%) Support Analyst
3 4 (17.39%) Infrastructure Manager
3 4 (17.39%) Network Engineer
4 3 (13.04%) 2nd Line Support
4 3 (13.04%) 2nd Line Support Analyst
4 3 (13.04%) 2nd Line Support Manager
4 3 (13.04%) Infrastructure Support Manager
4 3 (13.04%) IT Infrastructure Manager
4 3 (13.04%) IT Manager
4 3 (13.04%) IT Support Manager
4 3 (13.04%) Support Engineer
4 3 (13.04%) Support Manager
Libraries, Frameworks & Software Standards
1 9 (39.13%) Web Services
2 4 (17.39%) XMPP
3 1 (4.35%) 802.1X
3 1 (4.35%) HTML
Miscellaneous
1 10 (43.48%) Video Conferencing
2 2 (8.70%) Analytical Skills
2 2 (8.70%) Data Centre
2 2 (8.70%) Fat Client
2 2 (8.70%) Replication
2 2 (8.70%) Thin Client
3 1 (4.35%) BYOD
3 1 (4.35%) Clustering
3 1 (4.35%) Management Information System
3 1 (4.35%) Mobile App
3 1 (4.35%) Self-Motivation
Operating Systems
1 9 (39.13%) Windows
2 7 (30.43%) Windows Server
2 7 (30.43%) Windows Server 2008
2 7 (30.43%) Windows Server 2012
2 7 (30.43%) Windows XP
3 2 (8.70%) Windows Server 2003
Processes & Methodologies
1 12 (52.17%) ITIL
2 7 (30.43%) Continuous Improvement
3 4 (17.39%) Fund Management
3 4 (17.39%) Problem-Solving
4 3 (13.04%) Infrastructure Engineering
5 2 (8.70%) Capacity Planning
5 2 (8.70%) DevOps
5 2 (8.70%) ITIL V3
5 2 (8.70%) Load Balancing
5 2 (8.70%) Migration
5 2 (8.70%) Network Design
5 2 (8.70%) Server Virtualisation
6 1 (4.35%) Agile Software Development
6 1 (4.35%) Business Intelligence
6 1 (4.35%) CRM
6 1 (4.35%) Network Monitoring
6 1 (4.35%) Presales
6 1 (4.35%) PRINCE2
6 1 (4.35%) Time Management
6 1 (4.35%) WFM
Programming Languages
1 11 (47.83%) SQL
2 9 (39.13%) PowerShell
3 2 (8.70%) VB
4 1 (4.35%) C
Qualifications
1 5 (21.74%) CCNP
1 5 (21.74%) Cisco Certification
2 2 (8.70%) CCA
2 2 (8.70%) CCAA
2 2 (8.70%) CCNA
2 2 (8.70%) Citrix Certification
2 2 (8.70%) ITIL Certification
2 2 (8.70%) MCITP
2 2 (8.70%) MCSE
2 2 (8.70%) Microsoft Certification
2 2 (8.70%) Novell Certification
2 2 (8.70%) VMware Certified Professional (VCP)
3 1 (4.35%) MOS
3 1 (4.35%) Security Cleared
System Software
1 10 (43.48%) VMware Infrastructure
2 9 (39.13%) Active Directory
2 9 (39.13%) XenApp
3 2 (8.70%) ProxySG
3 2 (8.70%) vSphere
Systems Management
1 12 (52.17%) Cisco CUCM
2 7 (30.43%) SCCM
2 7 (30.43%) XenMobile
3 3 (13.04%) Backup Exec
3 3 (13.04%) Cisco UCCX
Vendors
1 18 (78.26%) Cisco
2 12 (52.17%) CheckPoint
3 11 (47.83%) Blue Coat
3 11 (47.83%) Microsoft
4 10 (43.48%) VMware
5 9 (39.13%) Citrix
6 7 (30.43%) IronPort
6 7 (30.43%) Riverbed
6 7 (30.43%) Veeam
7 6 (26.09%) Cognizant
8 5 (21.74%) Avaya
8 5 (21.74%) Meraki
8 5 (21.74%) SolarWinds
9 4 (17.39%) HP
10 3 (13.04%) Bloomberg
11 2 (8.70%) Brocade
11 2 (8.70%) CommVault
11 2 (8.70%) Dell
11 2 (8.70%) EMC
11 2 (8.70%) Fortinet