1. The NetworX Series — NX4, NX6, NX8, NX8E
The GE-Caddx NetworX range was one of the most widely deployed hardwired alarm systems in Singapore throughout the 1990s and 2000s. Thousands of installations remain active today across landed homes, commercial shophouses, government buildings, and industrial facilities.
The series covers four main panel variants:
NX4 — a compact 4-zone panel suited to small residential properties and single-tenancy commercial units. Simple to programme and reliable in operation.
NX6 — a mid-range 6-zone panel covering slightly larger properties. Less commonly deployed in Singapore than the NX8 but still found in a number of landed home installations.
NX8 — the workhorse of the range. An 8-zone panel expandable to 48 zones via the NX series bus, making it suitable for larger landed properties, commercial premises, and multi-zone industrial sites.
NX8E — the expanded variant of the NX8, with enhanced communication capability. Commonly found in installations that required reporting to a central alarm monitoring station.
All four panels share the same NetworX architecture, the same keypad ecosystem, and the same programming logic. Securevision supports all of them.
2. The Manufacturer Situation
Manufacturer Status
Interlogix — the company that manufactured the GE-Caddx NetworX series — ceased operations and exited the market at the end of 2019. There are no new panels, keypads, or mainboards available from the manufacturer. Official manufacturer support and firmware updates have ended.
This does not mean your system stops working tomorrow. NetworX panels are robust, well-engineered hardware. Many installations that have been properly maintained continue to operate without issue. The practical implications are:
- Replacement mainboards and keypads are not available through the standard supply chain
- If a mainboard fails, the panel cannot be repaired — it must be replaced
- If a keypad fails, a direct replacement is increasingly difficult to source
- Technical support from the manufacturer is no longer available
What this means in practice is that continued operation depends on the physical hardware remaining intact — and on having a technician who knows the system well enough to support it without manufacturer assistance. Securevision has been working with the NX series since the panels were first deployed in Singapore. We know them thoroughly.
3. What Securevision Can Still Do
Despite the manufacturer's exit, there is a significant scope of support we can provide for existing NX installations.
Programming and configuration
Zone programming, user code management, keypad configuration, entry and exit delay adjustment, and walk-test activation. We work from the original NX series documentation and from two decades of hands-on field experience with these panels.
User code management
Adding, changing, and deleting user codes across all NX models. This is one of the most frequent requests we receive — a previous occupant's code needs to be removed, or a new code needs to be added after a staff change.
Zone bypass and reinstatement
Bypassing a faulty zone to keep the system operational while a detector is repaired or replaced. We programme and document all bypasses clearly so nothing is left unresolved.
Fault diagnosis
Reading panel fault logs, identifying the source of persistent alerts, and advising on whether the fault is a programming issue, a detector issue, or a hardware issue at the panel itself.
Battery replacement
The 7Ah standby battery is a consumable component. We stock and replace these as part of routine servicing visits.
Annual servicing
Full system inspection, detector testing, communication path testing, battery load test, and panel log review. We issue a service report after every visit.
4. Common Fault Indicators
Two faults account for the majority of calls we receive on NX installations.
Low Battery
The NX series is programmed to perform automatic battery tests at regular intervals. Securevision programmes these tests fortnightly as standard — though the frequency depends on how the original installer configured the system. When the panel displays a low battery condition, it means the test has detected that the 7Ah standby battery is no longer holding sufficient charge to meet the required backup duration.
This is the most common fault on ageing NX installations and is straightforward to resolve. The battery is a standard 7Ah sealed lead-acid unit. Replacement restores normal operation immediately. Do not ignore a persistent low battery warning — if the battery fails completely, the system will not function during a mains power failure.
Key Point
A low battery warning on your NX panel does not mean the panel is failing. It means the 7Ah standby battery needs replacing — a routine maintenance task. Contact us and we will arrange a replacement visit.
Communication Error / Comms Fault
This fault appears when the panel attempts to send an alert — triggered by an alarm event or a system fault — and cannot complete the call. The NX series communicates via the telephone line, dialling out to a programmed number when an event occurs. Depending on how the system was originally configured, that number may be a central alarm monitoring station, a mobile phone, or a pager.
A comms fault means one of the following has occurred:
- The panel dialled out but received no answer
- The panel could not detect a dial tone on the telephone line
- The programmed number is no longer in service
This is increasingly common on Singapore NX installations for a specific reason: PSTN landlines are being progressively discontinued. If the telephone line the panel relies on has been deactivated, the panel will generate a comms fault every time it attempts to dial out. Similarly, pager services — which were a common monitoring path for NX installations in the 1990s and 2000s — are no longer operational.
In many cases this is a programming fix: updating the dial-out number or reconfiguring the communication path. However, if the underlying telephone line has been permanently discontinued, a programming fix is not sufficient — the communication path itself needs to change.
PSTN and Pager Note
If your NX panel was programmed to dial a pager or report via a landline that has since been discontinued, a comms fault will appear persistently regardless of panel condition. This is a communication path issue, not a panel fault. We can assess your current communication setup and advise on the correct solution.
5. When the Panel Needs to Be Replaced
Not every issue on an NX installation can be resolved through servicing. The following situations indicate that a panel replacement is necessary.
Mainboard failure
If the panel's mainboard fails — typically indicated by total loss of function, inability to arm or disarm, or the keypad displaying no response — the panel cannot be repaired. Replacement mainboards are not available. The system must be replaced.
Keypad failure
If a keypad fails and a direct replacement cannot be sourced, the system becomes inoperable. Keypads from the NX series are increasingly difficult to find and cannot be substituted with keypads from other manufacturers.
Persistent communication path failure
If the panel's communication path cannot be restored — because the telephone line has been permanently discontinued and the panel does not support alternative communication methods — continued monitoring is not possible without a panel upgrade.
Securevision Assessment
If your NX panel is powering up, responding to keypad input, and the only issues are a low battery or a comms fault, servicing is the right course of action. If the mainboard or keypad has failed, or if the communication path cannot be restored, a panel replacement is the only viable option. We will tell you honestly which situation you are in.
6. The Upgrade Path: What You Keep, What Changes
When an NX panel reaches the end of its serviceable life, the upgrade does not require starting from scratch. In the vast majority of Singapore installations, the existing infrastructure can be retained.
What you keep
Zone cabling — the two-core or four-core alarm cable running from the panel to every detector — is standard wiring that is fully compatible with modern hardwired alarm panels. It does not need to be replaced.
Detectors — PIR motion sensors, door contacts, and shock sensors installed as part of the original GE-Caddx system are standard NC/NO devices. These are compatible with any modern hardwired panel and can be carried over directly in almost all cases.
What changes
The mainboard and keypad are replaced. That is typically all that needs to change.
What we recommend
Securevision recommends the RISCO hardwired panel range as the replacement for GE-Caddx NX installations. RISCO supports GSM communication and a mobile app, resolving the PSTN and pager dependency that affects many ageing NX installations. The system is fully programmed, tested, and handed over with documentation. Monitoring continuity is maintained throughout the transition.
The upgrade retains your existing zone layout, your existing detector positions, and your existing cabling. The result is a fully supported, currently manufactured system operating on modern communication paths — with no unnecessary disruption to the installation.
