Integrated Service Digital Network (ISDN)
UK
The table below provides summary statistics for contract job vacancies requiring ISDN skills. It includes a benchmarking guide to the contractor rates offered in vacancies that cited ISDN over the 6 months leading up to 30 April 2025, comparing them to the same period in the previous two years.
| 6 months to 30 Apr 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | 510 | 585 | 675 |
| Rank change year-on-year | +75 | +90 | +154 |
| Contract jobs citing ISDN | 9 | 15 | 38 |
| As % of all contract jobs advertised in the UK | 0.031% | 0.034% | 0.064% |
| As % of the Communications & Networking category | 0.24% | 0.27% | 0.52% |
| Number of daily rates quoted | 1 | 11 | 5 |
| 10th Percentile | - | £488 | £282 |
| 25th Percentile | £538 | £613 | - |
| Median daily rate (50th Percentile) | £575 | £635 | £400 |
| Median % change year-on-year | -9.45% | +58.75% | -20.00% |
| 75th Percentile | £613 | £672 | £575 |
| 90th Percentile | - | - | - |
| UK excluding London median daily rate | - | £630 | £475 |
| % change year-on-year | - | +32.63% | +5.56% |
| Number of hourly rates quoted | 4 | 1 | 0 |
| 10th Percentile | £57.50 | - | - |
| 25th Percentile | £68.75 | £58.50 | - |
| Median hourly rate | £75.00 | £63.00 | - |
| Median % change year-on-year | +19.05% | - | - |
| 75th Percentile | - | £67.50 | - |
| 90th Percentile | - | - | - |
| UK excluding London median hourly rate | £75.00 | £63.00 | - |
| % change year-on-year | +19.05% | - | - |
All Communications and Computer Networking Skills
UK
ISDN falls under the Communications and Computer Networking category. For comparison with the information above, the following table provides summary statistics for all contract job vacancies requiring communications or computer networking skills.
| Contract vacancies with a requirement for communications or computer networking skills | 3,739 | 5,643 | 7,361 |
| As % of all contract IT jobs advertised in the UK | 12.79% | 12.94% | 12.33% |
| Number of daily rates quoted | 2,297 | 3,382 | 4,789 |
| 10th Percentile | £213 | £205 | £235 |
| 25th Percentile | £363 | £350 | £400 |
| Median daily rate (50th Percentile) | £488 | £495 | £519 |
| Median % change year-on-year | -1.52% | -4.53% | +3.70% |
| 75th Percentile | £600 | £600 | £638 |
| 90th Percentile | £675 | £700 | £725 |
| UK excluding London median daily rate | £463 | £475 | £475 |
| % change year-on-year | -2.63% | - | +8.57% |
| Number of hourly rates quoted | 181 | 423 | 478 |
| 10th Percentile | £14.20 | £13.57 | £9.80 |
| 25th Percentile | £17.30 | £17.35 | £10.63 |
| Median hourly rate | £32.50 | £38.50 | £19.00 |
| Median % change year-on-year | -15.58% | +102.63% | -31.84% |
| 75th Percentile | £58.75 | £62.50 | £60.00 |
| 90th Percentile | £75.00 | £67.40 | £75.00 |
| UK excluding London median hourly rate | £24.59 | £45.88 | £18.50 |
| % change year-on-year | -46.41% | +148.00% | -13.95% |
ISDN
Job Vacancy Trend
Job postings citing ISDN as a proportion of all IT jobs advertised.
ISDN
Contractor Daily Rate Trend
3-month moving average daily rate quoted in jobs citing ISDN.
ISDN
Contractor Hourly Rate Trend
3-month moving average hourly rates quoted in jobs citing ISDN.
ISDN
Hourly Rate Histogram
Hourly rate distribution of jobs citing ISDN over the 6 months to 30 April 2025.
ISDN
Top 7 Contract Locations
The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing ISDN within the UK over the 6 months to 30 April 2025. 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 Contract IT Job Ads |
Median Daily Rate Past 6 Months |
Median Daily Rate % Change on Same Period Last Year |
Live Jobs |
|---|---|---|---|---|---|
| England | +57 | 9 | £575 | -9.45% | 6 |
| London | +39 | 5 | £575 | -14.81% | |
| UK excluding London | +44 | 4 | - | - | 5 |
| South West | +47 | 3 | - | - | |
| Work from Home | +42 | 2 | £575 | -8.73% | 2 |
| North of England | +18 | 1 | - | - | 2 |
| Yorkshire | - | 1 | - | - |
ISDN
Co-occurring Skills and Capabilities by Category
The follow tables expand on the table above by listing co-occurrences grouped by category. The same employment type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:
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