Period
to 13 December 2018

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 13 December 2018 with a comparison to the same period in the previous 2 years.

Integrated Service Digital Network (ISDN)
England > London
6 months to
13 Dec 2018
Same period 2017 Same period 2016
Rank 742 797 783
Rank change year-on-year +55 -14 +101
Permanent jobs citing ISDN 45 53 62
As % of all permanent IT jobs advertised in London 0.068% 0.071% 0.084%
As % of the Communications & Networking category 0.51% 0.50% 0.53%
Number of salaries quoted 32 39 52
London median annual salary £42,500 £53,500 £52,500
Median salary % change year-on-year -20.56% +1.90% +5.00%
10th Percentile £32,000 £35,500 £31,500
90th Percentile £66,250 £65,000 £60,000
England median annual salary £37,500 £45,000 £45,000
% change year-on-year -16.67% - +12.50%

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 8,893 10,564 11,683
As % of all permanent IT jobs advertised in London 13.36% 14.23% 15.79%
Number of salaries quoted 7,242 8,706 9,933
London median annual salary £55,000 £53,500 £53,139
Median salary % change year-on-year +2.80% +0.68% +6.28%
10th Percentile £30,000 £31,000 £30,000
90th Percentile £85,000 £80,000 £80,000
England median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.56% - -

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 13 December 2018.

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 13 December 2018. 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
South London - 5 £36,250 -
West London +22 4 £45,000 -21.74%
Central London -2 4 £35,000 -36.36% 2
East London 0 3 £56,500 -9.60%
ISDN
England

For the 6 months to 13 December 2018, 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 32 (71.11%) Cisco
2 20 (44.44%) ITIL
3 19 (42.22%) Windows
3 19 (42.22%) Microsoft
3 19 (42.22%) Firewall
4 18 (40.00%) VMware
4 18 (40.00%) VoIP
5 16 (35.56%) Cisco Certification
6 15 (33.33%) CheckPoint
6 15 (33.33%) VPN
6 15 (33.33%) DNS
7 14 (31.11%) Active Directory
7 14 (31.11%) Cisco CUCM
8 13 (28.89%) VMware Infrastructure
8 13 (28.89%) Citrix
9 12 (26.67%) Unified Communications
10 11 (24.44%) CCNP
10 11 (24.44%) MPLS
10 11 (24.44%) WAN
10 11 (24.44%) Blue Coat
10 11 (24.44%) XMPP
11 10 (22.22%) Service Management
11 10 (22.22%) IP Telephony
11 10 (22.22%) TCP/IP
11 10 (22.22%) H.323
11 10 (22.22%) CCNA
11 10 (22.22%) Infrastructure Engineering
12 9 (20.00%) XenApp
12 9 (20.00%) Analytical Skills
12 9 (20.00%) SAN

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 (20.00%) IIS
2 7 (15.56%) Exchange Server 2013
3 6 (13.33%) Skype for Business
4 5 (11.11%) MS Exchange
5 3 (6.67%) Exchange Server 2007
6 2 (4.44%) CMS
6 2 (4.44%) Exchange Server 2010
Cloud Services
1 7 (15.56%) Amazon AWS
2 5 (11.11%) Slack
3 2 (4.44%) Azure Active Directory
3 2 (4.44%) Microsoft Azure
3 2 (4.44%) Office 365
Communications & Networking
1 19 (42.22%) Firewall
2 18 (40.00%) VoIP
3 15 (33.33%) DNS
3 15 (33.33%) VPN
4 12 (26.67%) Unified Communications
5 11 (24.44%) MPLS
5 11 (24.44%) WAN
6 10 (22.22%) H.323
6 10 (22.22%) IP Telephony
6 10 (22.22%) TCP/IP
7 9 (20.00%) Internet
7 9 (20.00%) SAN
8 8 (17.78%) Ethernet
8 8 (17.78%) LAN
9 7 (15.56%) DHCP
9 7 (15.56%) Skype
9 7 (15.56%) WebEx
10 6 (13.33%) VLAN
11 5 (11.11%) PSTN
11 5 (11.11%) Wireless
Database & Business Intelligence
1 7 (15.56%) SQL Server
1 7 (15.56%) SQL Server 2008
1 7 (15.56%) SQL Server 2012
2 4 (8.89%) SQL Server 2014
2 4 (8.89%) SQL Server 2016
3 3 (6.67%) SQL Server 2005
General
1 4 (8.89%) Finance
1 4 (8.89%) Telecoms
2 3 (6.67%) Advertising
3 2 (4.44%) Multimedia
4 1 (2.22%) Local Government
Job Titles
1 12 (26.67%) IT Support
2 8 (17.78%) Analyst
2 8 (17.78%) Infrastructure Engineer
2 8 (17.78%) Infrastructure Support
2 8 (17.78%) Support Analyst
2 8 (17.78%) Voice Engineer
3 7 (15.56%) Cisco Engineer
3 7 (15.56%) Infrastructure Analyst
3 7 (15.56%) Infrastructure Support Analyst
3 7 (15.56%) IT Analyst
3 7 (15.56%) IT Infrastructure Analyst
3 7 (15.56%) IT Support Analyst
3 7 (15.56%) Unified Communications Engineer
4 6 (13.33%) Cisco Voice Engineer
4 6 (13.33%) Telephony Engineer
5 5 (11.11%) Consultant
5 5 (11.11%) IT Support Specialist
5 5 (11.11%) Senior Infrastructure Engineer
5 5 (11.11%) Support Specialist
5 5 (11.11%) Unified Communications Consultant
Libraries, Frameworks & Software Standards
1 11 (24.44%) XMPP
2 7 (15.56%) Web Services
3 1 (2.22%) 802.1X
Miscellaneous
1 9 (20.00%) Analytical Skills
1 9 (20.00%) Video Conferencing
2 6 (13.33%) Self-Motivation
3 5 (11.11%) User Experience
4 3 (6.67%) CCTV
5 2 (4.44%) Data Centre
5 2 (4.44%) Fat Client
5 2 (4.44%) Replication
5 2 (4.44%) Thin Client
6 1 (2.22%) BYOD
6 1 (2.22%) Mobile App
Operating Systems
1 19 (42.22%) Windows
2 7 (15.56%) Windows Server
2 7 (15.56%) Windows Server 2008
2 7 (15.56%) Windows Server 2012
2 7 (15.56%) Windows XP
3 2 (4.44%) Windows Server 2003
4 1 (2.22%) MVS
4 1 (2.22%) Unix
4 1 (2.22%) Windows NT
Processes & Methodologies
1 20 (44.44%) ITIL
2 10 (22.22%) Infrastructure Engineering
2 10 (22.22%) Service Management
3 7 (15.56%) Continuous Improvement
4 6 (13.33%) Load Balancing
4 6 (13.33%) Problem-Solving
5 5 (11.11%) Agile Software Development
5 5 (11.11%) Configuration Management
5 5 (11.11%) CRM
5 5 (11.11%) Information Security
5 5 (11.11%) Presales
5 5 (11.11%) Problem Management
5 5 (11.11%) Time Management
6 4 (8.89%) Fund Management
6 4 (8.89%) ITSM
6 4 (8.89%) Proactive Monitoring
7 2 (4.44%) Change Control
7 2 (4.44%) DevOps
7 2 (4.44%) Migration
7 2 (4.44%) Server Virtualisation
Programming Languages
1 9 (20.00%) SQL
2 7 (15.56%) PowerShell
3 5 (11.11%) C
Qualifications
1 16 (35.56%) Cisco Certification
2 11 (24.44%) CCNP
3 10 (22.22%) CCNA
4 6 (13.33%) MCSE
4 6 (13.33%) Microsoft Certification
4 6 (13.33%) VMware Certified Professional (VCP)
5 5 (11.11%) Degree
6 4 (8.89%) CCSA
6 4 (8.89%) MCP
7 3 (6.67%) CCDA
7 3 (6.67%) CCVP
8 2 (4.44%) CCA
8 2 (4.44%) CCAA
8 2 (4.44%) Citrix Certification
8 2 (4.44%) ITIL Certification
8 2 (4.44%) MCITP
8 2 (4.44%) Novell Certification
9 1 (2.22%) CCIE
9 1 (2.22%) MOS
9 1 (2.22%) Security Cleared
Quality Assurance & Compliance
1 4 (8.89%) SLA
System Software
1 14 (31.11%) Active Directory
2 13 (28.89%) VMware Infrastructure
3 9 (20.00%) XenApp
4 5 (11.11%) Terminal Services
5 4 (8.89%) Hyper-V
5 4 (8.89%) XenServer
6 2 (4.44%) ProxySG
6 2 (4.44%) vSphere
Systems Management
1 14 (31.11%) Cisco CUCM
2 7 (15.56%) SCCM
2 7 (15.56%) XenMobile
3 5 (11.11%) Cisco UCCX
4 3 (6.67%) Backup Exec
5 2 (4.44%) Norton AntiVirus
Vendors
1 32 (71.11%) Cisco
2 19 (42.22%) Microsoft
3 18 (40.00%) VMware
4 15 (33.33%) CheckPoint
5 13 (28.89%) Citrix
6 11 (24.44%) Blue Coat
7 7 (15.56%) IronPort
7 7 (15.56%) Riverbed
7 7 (15.56%) Veeam
8 6 (13.33%) Cognizant
9 5 (11.11%) Avaya
9 5 (11.11%) Google
9 5 (11.11%) Mitel
9 5 (11.11%) SolarWinds
10 4 (8.89%) Extreme Networks
10 4 (8.89%) HP
10 4 (8.89%) Juniper
10 4 (8.89%) Meraki
10 4 (8.89%) NetApp
11 3 (6.67%) Motorola