DIGITAL SWITCHOVER READINESS
Independent Telephony
Audits for Complex Sites
and Critical Services
PBXiT helps hotels, care environments, multi-site businesses and complex estates identify, understand and safely migrate legacy analogue and ISDN services before the PSTN & copper switch-off.
The risk is not just the phone line. The real risk is not knowing what that line supports.
Hidden analogue services may support:
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Lift emergency phones and refuge communication points
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Fire alarm panels, intruder alarms and security signalling
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Door entry, access control, CCTV and monitoring systems
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Payment terminals, fax machines, modems and plant equipment
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Legacy PBX trunks, DDI ranges and out-of-band support lines
THE CHALLENGE
The analogue switch-off is a
business continuity risk
Many organisations have moved their main telephony forward, but still retain older analogue lines supporting operational, safety and monitoring systems. These services are often poorly documented, buried in billing records, or known only to long-serving site staff.
PBXiT helps answer the questions suppliers often cannot answer without discovery.
✓ What PSTN, ISDN and analogue services are still active?
✓ Where do those lines physically terminate?
✓ Which lines support critical systems and which are redundant?
✓ Which vendors must be involved before migration?
✓ What is the safest and most cost-effective migration path?
CORE OFFERING
Telephony audit and migration readiness services
PBXiT provides structured discovery, technical investigation and practical reporting to help organisations move from uncertainty to controlled digital transition
01
Analogue Line Audit
Identify active PSTN lines, understand what they support, classify risk and determine whether each line should be migrated, replaced, ceased or investigated further.
02
ISDN & PBX Review
Review ISDN2, ISDN30, DDI ranges, legacy PBX trunks, analogue extensions and associated voice infrastructure before migration planning.
03
Critical Device Discovery
Locate services connected to lifts, alarms, door entry, PDQs, monitoring devices, emergency phones, faxes, modems and plant infrastructure.
04
Multi-Site Estate Audit
Create a consolidated view of telephony risk across hotels, branches, offices, care locations, depots, warehouses or mixed property estates.
05
Migration Readiness
Prepare evidence and technical insight for SIP, hosted voice, cloud telephony, Teams Phone, alarm signalling replacement or alternative digital services.
06
Vendor Coordination
Support engagement with lift, fire, alarm, payment, access control, telecare, BMS and specialist system providers before line changes are made.
Why PDPL still needs investigation
Many organisations have accepted PDPL because an analogue line was still active, but that does not always mean the line is understood, business-critical or still required. In some cases, the line may support a lift phone, fire or intruder alarm, door entry, payment terminal, fax, modem, plant system or an old PBX service. In others, it may be unused and simply generating higher ongoing cost.
✓ PDPL keeps legacy equipment connected while migration is planned, but it is not the destination.
✓ Every PDPL line should be traced, tested and linked to the equipment or service it supports.
✓ Lines that are no longer needed should be ceased as soon as it is safe to do so.
✓ Lines supporting critical devices should be moved to a proper IP, VoIP or specialist digital replacement.
BT's Pre-Digital Phone Line can help keep some legacy handsets and equipment working while moving services away from the PSTN. But it should be treated as a temporary transition product, not a reason to delay understanding what is connected to the line.
PDPL is a bridge, not a long-term solution
PRE-DIGITAL PHONE LINE
PBXiT PDPL Line Investigation Service
PBXiT helps companies that have installed PDPL lines from BT to find out exactly what those lines are doing and what needs to happen next.
✓ Review BT PDPL line records, bills and known site information.
✓ Trace the analogue line to the end device, socket, panel, PBX, alarm, lift, modem or service.
✓ Confirm whether the line is active, critical, redundant, unknown or suitable for change.
✓ Identify whether the connected equipment can work over IP/VoIP or needs vendor replacement.
✓ Produce a RAG-rated PDPL action report showing cease, migrate, replace or investigate-next steps.
Red: Critical dependency
The PDPL line supports safety, alarm, lift, access, care, monitoring or business-critical equipment. Do not cease or migrate until the end device and replacement path are confirmed.
Amber: Needs vendor action
The line has a known use, but the connected equipment needs checking by a lift, alarm, fire, access control, payment, BMS or telecare provider before moving to IP.
Green: Cost-saving opportunity
The line appears unused, duplicated or no longer required. PBXiT helps validate this so the service can be safely ceased and avoid unnecessary PDPL charges.
TECHNICAL CAPABILITY
Deep telephony knowledge, not just a spreadsheet review
PBXiT understands the difference between a billing record and a working service. We know why low call usage does not always mean low importance, and why a controlled migration starts with evidence.
PSTN and analogue exchange lines
Carrier billing reconciliation
Redundant
services
Pre-Digital Phone Line
Critical line dependency mapping
Risk
mitigation
ISDN2 and ISDN30 services
Multi-site discovery reporting
Line
utilisation
Legacy PBX platforms
Supplier & Vendor Management
Fraud
exposure
1
Discover
Gather bills, inventories, carrier data, site contacts and known critical systems.
Red Risk
Critical or unknown lines that could impact safety, operations or compliance if changed without investigation.
From analogue uncertainty to digital readiness
A clear, repeatable audit method designed for complex sites, mixed suppliers and incomplete documentation.
2
Analyse
Review services, identify unknown lines, billing anomalies and likely PSTN or ISDN exposure.
3
Investigate
Attend site where required to trace lines, test services and inspect comms areas.
Amber Risk
Operational services requiring vendor confirmation, migration planning or further technical validation.
AUDIT PROCESS
4
Classify
Assign status, criticality and risk to each service or circuit.
Recommend
Produce practical actions, vendor dependencies and migration considerations.
5
Green Opportunity
Known, low-risk or redundant services that may be suitable for migration, consolidation or cease.
6
Support
Assist with follow-up planning, supplier coordination and transition readiness.
Hotels & Hospitality
Hotels often have complex telecoms built up over many years across guest rooms, reception, lifts, fire panels, payment systems and back-of-house areas.
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Hotels and hotel groups
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Country house hotels
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Conference hotels
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Serviced apartments
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Holiday parks and resorts
Specialist support for sectors where legacy lines matter
PBXiT works with organisations where telephony is connected to safety, guest experience, building operations and business continuity.
Assisted Living & Care
Care environments require careful handling where analogue services may support emergency communication, warden call, telecare and alarms.
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Care homes
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Assisted living schemes
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Retirement living
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Supported housing
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Extra-care facilities
WHO WE HELP
Multi-Site Estates
Large estates often have inconsistent records, multiple suppliers and legacy services spread across branches, depots, offices and operational sites.
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Retail estates
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Manufacturing sites
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Public sector estates
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Healthcare and education
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Heritage properties
OUTPUTS
Clear deliverables you can act on
PBXiT reporting is written for both technical and senior stakeholders, giving decision-makers a practical understanding of exposure, risk, cost and next steps.
Typical audit outputs include:
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Telephony audit report and executive summary
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Analogue, PSTN, ISDN and PDPL line inventory
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Site-by-site risk register
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RAG-rated service classification
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Critical service dependency list
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Unknown line investigation summary
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Redundant line and saving opportunities
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PDPL cost-reduction and cease recommendations
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Vendor action list
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Migration-readiness recommendations
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Prioritised next-step action plan
Contact PBXiT
Need to understand your analogue, ISDN or legacy telephony risk?
Contact PBXiT to arrange an initial discovery call.
PBXiT
Bawtry Hall
South Parade
Bawtry
Nottinghamshire
DN10 6JH
Email: info@pbxit.co.uk