PBX STANLEY COMpact 4000 90118 — PBX system with 16 ports and 4 ISDN channels

STANLEY COMpact 4000 is a PBX telephone system designed for small to medium-sized businesses that require centralized call handling with support for multiple extensions and ISDN connectivity. The unit provides 16 internal ports for extensions and supports up to four ISDN channels for external lines, enabling simultaneous external calls and efficient routing within an office environment. The system is intended for tabletop or rack-adjacent installation in telephony closets or small server rooms and integrates with standard office handsets and analog devices where compatible.

Advantages

The STANLEY COMpact 4000 delivers a balanced set of features for basic business telephony: 16 internal ports allow multiple users to have dedicated extensions while four ISDN channels provide reliable external line capacity for concurrent calls. The system centralizes call routing and basic call management functions, reducing the need for separate line arrangements per desk. Its design focuses on compatibility with common office telephone equipment, straightforward physical footprint for small installations, and stable ISDN connectivity for clear voice traffic.

Suitable for

• Small offices and branch locations requiring up to 16 extensions
• Reception desks and shared-line environments
• Teams needing up to four simultaneous external ISDN calls
• Basic voice networks with on-premises PBX management

Key specifications

• Extension capacity: 16 internal ports for office handsets
• External line support: up to 4 ISDN channels for concurrent external calls
• Functionality: centralized call routing and basic call management features
• Installation location: suitable for telephony closet, small server room, or tabletop placement
• Compatibility: works with standard office handsets and compatible analog devices

How to use

Install the PBX in a stable, ventilated location near power and ISDN network termination points. Connect the ISDN lines to the designated external line inputs and attach office handsets to the internal ports. Configure extension numbering and call routing parameters using the system’s administration interface or programming tool according to your office layout and dialing plan. Test incoming and outgoing calls, verify that multiple external calls can be handled simultaneously, and adjust routing rules or extension assignments as needed.

Usage recommendations

Place the unit in a protected, dry environment with consistent power; use a surge protector or UPS for improved resilience. Keep firmware or system programming documentation accessible and record extension assignments. For environments with growing communication needs, evaluate channel usage periodically and consider integrating additional communication services if simultaneous call demand exceeds four ISDN channels.