The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for ISDN skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited ISDN over the 3 months to 24 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

3 months to
24 Mar 2017
Same period 2016 Same period 2015
Integrated Service Digital Network (ISDN)
London / City of London
Rank 151 156 187
Rank change year-on-year +5 +31  
Contract jobs citing ISDN 2 2 2
As % of all contract IT jobs advertised in the City of London 0.066% 0.061% 0.040%
As % of the Communications & Networking category 0.58% 0.52% 0.29%
Number of daily rates quoted 0 1 1
Median daily rate - £388 £340
Median daily rate % change year-on-year - +13.97%  
UK excluding London median daily rate £224 £300 £270
% change year-on-year -25.50% +11.11%  
Number of hourly rates quoted 0 1 1
Median hourly rate - £26.00 £13.46
Median hourly rate % change year-on-year - +93.16%  
UK excluding London median hourly rate - £35.69 -

ISDN is in the communications and computer networking skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for communications and computer networking skills.

Contract Communications & Computer Network Skills
City of London
Contract job vacancies with a requirement for communications and computer networking skills 346 381 684
As % of all contract IT job vacancies advertised in the City of London 11.41% 11.57% 13.55%
Number of daily rates quoted 259 281 503
Median daily rate £425 £425 £400
Median daily rate % change year-on-year - +6.25%  
90% offered a daily rate of more than £200 £275 £238
10% offered a daily rate of more than £575 £550 £550
UK excluding London median daily rate £375 £363 £347
% change year-on-year +3.44% +4.32%  
Number of hourly rates quoted 11 11 12
Median hourly rate £19.00 £26.00 £18.70
Median hourly rate % change year-on-year -26.92% +39.03%  
90% offered a hourly rate of more than £13.70 £19.00 £13.46
10% offered a hourly rate of more than £27.73 £30.00 £40.00
UK excluding London median hourly rate £22.50 £37.00 £29.00
% change year-on-year -39.18% +27.58%  

ISDN
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing ISDN as a proportion of all contract or permanent IT jobs with a match in the Communications & Networking category.

Job vacancy trend for ISDN in the City of London

ISDN
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing ISDN in the City of London.

Contractor daily rate trend for ISDN in the City of London

ISDN
Contractor Hourly Rate Trend in the City of London

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

Contractor hourly rate trend for ISDN in the City of London

ISDN
Top 30 Related IT Skills in the City of London

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

1 9 (100.00%) Cisco
2 7 (77.78%) Microsoft
3 6 (66.67%) VoIP
3 6 (66.67%) Video Conferencing
4 5 (55.56%) Skype for Business
5 4 (44.44%) Smartphone
5 4 (44.44%) Citrix
5 4 (44.44%) MS Office
6 3 (33.33%) Virtual Team
6 3 (33.33%) ITIL
6 3 (33.33%) MS Exchange
6 3 (33.33%) Finance
6 3 (33.33%) Polycom
6 3 (33.33%) Unified Communications
6 3 (33.33%) Sonus
6 3 (33.33%) Office 365
6 3 (33.33%) Mentoring
6 3 (33.33%) Skype
7 2 (22.22%) PABX
7 2 (22.22%) NGN
7 2 (22.22%) Mitel
7 2 (22.22%) Handset
7 2 (22.22%) Wireless
7 2 (22.22%) Telecoms
7 2 (22.22%) Broadband
7 2 (22.22%) PBX
7 2 (22.22%) PSTN
7 2 (22.22%) Avaya
7 2 (22.22%) Siemens
8 1 (11.11%) Financial Institution

ISDN
Top Related 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 5 (55.56%) Skype for Business
2 3 (33.33%) MS Exchange
Applications
1 4 (44.44%) MS Office
Cloud Services
1 3 (33.33%) Office 365
Communications & Networking
1 6 (66.67%) VoIP
2 3 (33.33%) Skype
2 3 (33.33%) Unified Communications
3 2 (22.22%) Broadband
3 2 (22.22%) NGN
3 2 (22.22%) PABX
3 2 (22.22%) PBX
3 2 (22.22%) PSTN
3 2 (22.22%) Wireless
General
1 3 (33.33%) Finance
2 2 (22.22%) Telecoms
3 1 (11.11%) Financial Institution
3 1 (11.11%) Retail
Job Titles
1 4 (44.44%) Audio Visual Technician
2 3 (33.33%) Analyst
2 3 (33.33%) Lync Engineer
2 3 (33.33%) Unified Communications Engineer
3 2 (22.22%) Cisco Specialist
3 2 (22.22%) Cisco VoIP Specialist
3 2 (22.22%) Mitel Specialist
3 2 (22.22%) Telecoms Specialist
3 2 (22.22%) VoIP Specialist
Miscellaneous
1 6 (66.67%) Video Conferencing
2 4 (44.44%) Smartphone
3 3 (33.33%) Virtual Team
4 2 (22.22%) Handset
5 1 (11.11%) Equities
5 1 (11.11%) Fixed Income
Processes & Methodologies
1 3 (33.33%) ITIL
1 3 (33.33%) Mentoring
2 1 (11.11%) Asset Management
Vendors
1 9 (100.00%) Cisco
2 7 (77.78%) Microsoft
3 4 (44.44%) Citrix
4 3 (33.33%) Polycom
4 3 (33.33%) Sonus
5 2 (22.22%) Avaya
5 2 (22.22%) Mitel
5 2 (22.22%) Siemens