Period
to 23 October 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 23 October 2018 with a comparison to the same period in the previous 2 years.

Integrated Service Digital Network (ISDN)
England > London
6 months to
23 Oct 2018
Same period 2017 Same period 2016
Rank 781 788 791
Rank change year-on-year +7 +3 +101
Permanent jobs citing ISDN 40 59 69
As % of all permanent IT jobs advertised in London 0.059% 0.079% 0.090%
As % of the Communications & Networking category 0.43% 0.54% 0.58%
Number of salaries quoted 32 52 50
London median annual salary £43,750 £55,000 £52,500
Median salary % change year-on-year -20.45% +4.76% +5.00%
10th Percentile £22,400 £35,575 £31,475
90th Percentile £66,250 £63,500 £60,000
England median annual salary £37,500 £50,000 £45,000
% change year-on-year -25.00% +11.11% -

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 9,204 11,020 11,966
As % of all permanent IT jobs advertised in London 13.53% 14.76% 15.68%
Number of salaries quoted 7,538 9,034 10,247
London median annual salary £55,000 £55,000 £53,500
Median salary % change year-on-year - +2.80% +7.00%
10th Percentile £30,500 £30,000 £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 23 October 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 23 October 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 - 7 £23,000 -
West London +27 4 £45,000 -21.74% 1
East London -8 3 £56,500 +0.44%
Central London -32 2 £52,000 -13.33% 2
ISDN
England

For the 6 months to 23 October 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 26 (65.00%) Cisco
2 16 (40.00%) VoIP
3 15 (37.50%) Unified Communications
4 14 (35.00%) VPN
4 14 (35.00%) Windows
5 13 (32.50%) Microsoft
5 13 (32.50%) Cisco Certification
5 13 (32.50%) Firewall
5 13 (32.50%) VMware
6 12 (30.00%) ITIL
7 11 (27.50%) IP Telephony
8 10 (25.00%) Service Management
9 9 (22.50%) Infrastructure Engineering
10 8 (20.00%) Analytical Skills
10 8 (20.00%) Mitel
10 8 (20.00%) VMware Infrastructure
10 8 (20.00%) Active Directory
10 8 (20.00%) DNS
10 8 (20.00%) CCNP
10 8 (20.00%) CCNA
11 7 (17.50%) Citrix
11 7 (17.50%) Avaya
11 7 (17.50%) WAN
11 7 (17.50%) PSTN
11 7 (17.50%) Broadband
11 7 (17.50%) XMPP
11 7 (17.50%) Telecoms
11 7 (17.50%) PABX
11 7 (17.50%) Self-Motivation
12 6 (15.00%) Slack

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 5 (12.50%) Skype for Business
2 3 (7.50%) IIS
3 2 (5.00%) Exchange Server 2013
3 2 (5.00%) MS Exchange
4 1 (2.50%) Exchange Server 2010
Cloud Services
1 6 (15.00%) Slack
2 2 (5.00%) Amazon AWS
3 1 (2.50%) Azure Active Directory
3 1 (2.50%) Microsoft Azure
3 1 (2.50%) Office 365
Communications & Networking
1 16 (40.00%) VoIP
2 15 (37.50%) Unified Communications
3 14 (35.00%) VPN
4 13 (32.50%) Firewall
5 11 (27.50%) IP Telephony
6 8 (20.00%) DNS
7 7 (17.50%) Broadband
7 7 (17.50%) PABX
7 7 (17.50%) PSTN
7 7 (17.50%) WAN
8 6 (15.00%) H.323
8 6 (15.00%) MPLS
8 6 (15.00%) Skype
8 6 (15.00%) TCP/IP
8 6 (15.00%) WebEx
9 5 (12.50%) ADSL
9 5 (12.50%) VLAN
10 4 (10.00%) MGCP
10 4 (10.00%) PBX
10 4 (10.00%) SAN
Database & Business Intelligence
1 3 (7.50%) SQL Server
2 2 (5.00%) SQL Server 2008
2 2 (5.00%) SQL Server 2012
2 2 (5.00%) SQL Server 2014
2 2 (5.00%) SQL Server 2016
General
1 7 (17.50%) Telecoms
2 4 (10.00%) Local Government
3 3 (7.50%) Advertising
4 2 (5.00%) Multimedia
5 1 (2.50%) Finance
Job Titles
1 8 (20.00%) Cisco Engineer
2 7 (17.50%) Cisco Voice Engineer
2 7 (17.50%) Infrastructure Engineer
2 7 (17.50%) IT Support
2 7 (17.50%) Voice Engineer
3 6 (15.00%) Collaboration Consultant
3 6 (15.00%) Consultant
3 6 (15.00%) Telephony Engineer
3 6 (15.00%) Unified Communications Consultant
3 6 (15.00%) Unified Communications Engineer
4 5 (12.50%) IT Support Specialist
4 5 (12.50%) Support Specialist
5 4 (10.00%) Senior Cisco Engineer
5 4 (10.00%) Senior Infrastructure Engineer
5 4 (10.00%) Senior Voice Engineer
6 3 (7.50%) 2nd Line Engineer
6 3 (7.50%) Analyst
6 3 (7.50%) Collaboration Engineer
6 3 (7.50%) Infrastructure Support
6 3 (7.50%) Support Analyst
Libraries, Frameworks & Software Standards
1 7 (17.50%) XMPP
2 2 (5.00%) Web Services
3 1 (2.50%) 802.1X
Miscellaneous
1 8 (20.00%) Analytical Skills
2 7 (17.50%) Self-Motivation
3 5 (12.50%) User Experience
4 4 (10.00%) Video Conferencing
5 3 (7.50%) CCTV
6 2 (5.00%) Data Centre
7 1 (2.50%) Fat Client
7 1 (2.50%) Replication
7 1 (2.50%) Thin Client
Operating Systems
1 14 (35.00%) Windows
2 2 (5.00%) Windows Server
2 2 (5.00%) Windows Server 2008
2 2 (5.00%) Windows Server 2012
2 2 (5.00%) Windows XP
3 1 (2.50%) MVS
3 1 (2.50%) Unix
3 1 (2.50%) Windows NT
3 1 (2.50%) Windows Server 2003
Processes & Methodologies
1 12 (30.00%) ITIL
2 10 (25.00%) Service Management
3 9 (22.50%) Infrastructure Engineering
4 6 (15.00%) Load Balancing
4 6 (15.00%) Presales
4 6 (15.00%) Time Management
5 5 (12.50%) Agile Software Development
5 5 (12.50%) Configuration Management
5 5 (12.50%) CRM
5 5 (12.50%) Information Security
5 5 (12.50%) Problem Management
6 4 (10.00%) B2B
6 4 (10.00%) ITSM
6 4 (10.00%) Proactive Monitoring
6 4 (10.00%) Problem-Solving
6 4 (10.00%) Telesales
7 3 (7.50%) Network Design
8 2 (5.00%) Continuous Improvement
8 2 (5.00%) Fund Management
8 2 (5.00%) WFM
Programming Languages
1 6 (15.00%) C
2 3 (7.50%) SQL
3 2 (5.00%) PowerShell
Qualifications
1 13 (32.50%) Cisco Certification
2 8 (20.00%) CCNA
2 8 (20.00%) CCNP
3 5 (12.50%) Degree
3 5 (12.50%) MCSE
3 5 (12.50%) Microsoft Certification
3 5 (12.50%) VMware Certified Professional (VCP)
4 4 (10.00%) CCSA
4 4 (10.00%) MCP
5 3 (7.50%) CCDA
5 3 (7.50%) CCVP
6 1 (2.50%) CCA
6 1 (2.50%) CCAA
6 1 (2.50%) CCIE
6 1 (2.50%) Citrix Certification
6 1 (2.50%) MCITP
Quality Assurance & Compliance
1 4 (10.00%) SLA
System Software
1 8 (20.00%) Active Directory
1 8 (20.00%) VMware Infrastructure
2 5 (12.50%) Terminal Services
3 4 (10.00%) Hyper-V
3 4 (10.00%) XenServer
4 3 (7.50%) XenApp
5 1 (2.50%) Virtual Machines
5 1 (2.50%) VMware ESXi
5 1 (2.50%) vSphere
Systems Management
1 6 (15.00%) Cisco CUCM
2 3 (7.50%) Cisco UCCX
3 2 (5.00%) Norton AntiVirus
3 2 (5.00%) SCCM
3 2 (5.00%) XenMobile
Vendors
1 26 (65.00%) Cisco
2 13 (32.50%) Microsoft
2 13 (32.50%) VMware
3 8 (20.00%) Mitel
4 7 (17.50%) Avaya
4 7 (17.50%) Citrix
5 6 (15.00%) CheckPoint
6 5 (12.50%) Google
7 4 (10.00%) Ericsson
7 4 (10.00%) Extreme Networks
7 4 (10.00%) Juniper
7 4 (10.00%) NetApp
7 4 (10.00%) Panasonic
7 4 (10.00%) ShoreTel
8 3 (7.50%) MikroTik
8 3 (7.50%) Motorola
9 2 (5.00%) Blue Coat
9 2 (5.00%) Cognizant
9 2 (5.00%) HP
9 2 (5.00%) Symantec