The following table provides summary statistics for permanent job vacancies advertised in Hertfordshire with a requirement for PSTN skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited PSTN over the 3 months to 28 March 2017 with a comparison to the same period in the previous 2 years.

Public Switched Telecom Network (PSTN)
East of England / Hertfordshire
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 142 161 -
Rank change year-on-year +19 -  
Permanent jobs citing PSTN 1 1 0
As % of all permanent IT jobs advertised in Hertfordshire 0.045% 0.038% -
As % of the Communications & Networking category 0.28% 0.17% -
Number of salaries quoted 1 0 0
Median salary £60,000 - -
UK excluding London median salary £60,000 £49,500 £37,500
% change year-on-year +21.21% +32.00%  

PSTN is in the communications and computer networking skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in Hertfordshire with a requirement for communications and computer networking skills.

Communications & Computer Network Skills
Hertfordshire
Permanent job vacancies with a requirement for communications and computer networking skills 361 585 594
As % of all permanent IT job vacancies advertised in Hertfordshire 16.25% 22.51% 24.77%
Number of salaries quoted 257 467 440
Median salary £45,000 £40,000 £42,500
Median salary % change year-on-year +12.50% -5.88%  
90% offered a salary of more than £24,000 £25,000 £24,000
10% offered a salary of more than £60,000 £62,500 £65,000
UK excluding London median salary £40,000 £42,500 £41,500
% change year-on-year -5.88% +2.40%  

PSTN
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for PSTN in Hertfordshire

PSTN
Salary Trend in Hertfordshire

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

Salary trend for PSTN in Hertfordshire

PSTN
Top 30 Co-occurring IT Skills in Hertfordshire

For the 6 months to 28 March 2017, IT jobs citing PSTN also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Hertfordshire region with a requirement for PSTN.

1 3 (100.00%) PBX
1 3 (100.00%) DHCP
1 3 (100.00%) DNS
1 3 (100.00%) Unified Communications
2 2 (66.67%) Microsoft
2 2 (66.67%) Identity Management
2 2 (66.67%) Office 365
2 2 (66.67%) Windows Server 2012
2 2 (66.67%) IaaS
2 2 (66.67%) Skype
2 2 (66.67%) Windows Server
2 2 (66.67%) Skype for Business
2 2 (66.67%) Kerberos
2 2 (66.67%) Windows
2 2 (66.67%) LDAP
2 2 (66.67%) Active Directory
2 2 (66.67%) SCCM
2 2 (66.67%) SCOM
2 2 (66.67%) Hyper-V
2 2 (66.67%) Microsoft Azure
2 2 (66.67%) Amazon AWS
2 2 (66.67%) PaaS
3 1 (33.33%) Bash Shell
3 1 (33.33%) Cisco Certification
3 1 (33.33%) Internet
3 1 (33.33%) MPLS
3 1 (33.33%) BGP
3 1 (33.33%) DSL
3 1 (33.33%) RTP
3 1 (33.33%) SCCP

PSTN
Co-occurring IT Skills in Hertfordshire 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 2 (66.67%) Skype for Business
Cloud Services
1 2 (66.67%) Amazon AWS
1 2 (66.67%) IaaS
1 2 (66.67%) Microsoft Azure
1 2 (66.67%) Office 365
1 2 (66.67%) PaaS
Communications & Networking
1 3 (100.00%) DHCP
1 3 (100.00%) DNS
1 3 (100.00%) PBX
1 3 (100.00%) Unified Communications
2 2 (66.67%) Kerberos
2 2 (66.67%) LDAP
2 2 (66.67%) Skype
3 1 (33.33%) ADSL
3 1 (33.33%) BGP
3 1 (33.33%) Broadband
3 1 (33.33%) Ethernet
3 1 (33.33%) HTTP
3 1 (33.33%) HTTPS
3 1 (33.33%) Internet
3 1 (33.33%) ISDN
3 1 (33.33%) LAN
3 1 (33.33%) MPLS
3 1 (33.33%) Remote Desktop
3 1 (33.33%) TCP/IP
3 1 (33.33%) VoIP
Job Titles
1 2 (66.67%) Azure Engineer
1 2 (66.67%) Cloud Engineer
1 2 (66.67%) Microsoft Engineer
1 2 (66.67%) Windows Engineer
2 1 (33.33%) NOC Engineer
2 1 (33.33%) Technical Engineer
Miscellaneous
1 1 (33.33%) Analytical Skills
Operating Systems
1 2 (66.67%) Windows
1 2 (66.67%) Windows Server
1 2 (66.67%) Windows Server 2012
2 1 (33.33%) Linux
2 1 (33.33%) Unix
Processes & Methodologies
1 2 (66.67%) Identity Management
2 1 (33.33%) Root Cause Analysis
2 1 (33.33%) Ticket Management
Programming Languages
1 1 (33.33%) Bash Shell
1 1 (33.33%) Perl
Qualifications
1 1 (33.33%) CCNA
1 1 (33.33%) CCNP
1 1 (33.33%) Cisco Certification
1 1 (33.33%) JNCIA
1 1 (33.33%) JNCIP
Quality Assurance & Compliance
1 1 (33.33%) SLA
System Software
1 2 (66.67%) Active Directory
1 2 (66.67%) Hyper-V
Systems Management
1 2 (66.67%) SCCM
1 2 (66.67%) SCOM
Vendors
1 2 (66.67%) Microsoft