Altigen Communications, Inc. ALTI-CD0408UD-SPH001 Phone System Board Card

The Altigen Quantum ALTI-CD0408UD-SPH001 ISA phone system board delivers 4 trunk channels and 8 extension ports for Altigen Quantum PBX deployments, and is designed for legacy ISA-based installations. Each board provides six voice channels, enabling up to six voicemail ports to be active concurrently, with one port reserved to remain active in case of power interruption. This 4-trunk, 8-extension configuration fits the Quantum ISA family as a expansion card, and integrates on the MVIP/ISA bus architecture used by Altigen systems to route calls between trunks and extensions. Typical applications include offices requiring multiple trunk lines and a larger number of extension endpoints, such as receptionist, conference, and departmental lines, all managed through Altigen's telephony software layer. The ALTI-CD0408UD-SPH001 is part of the Quantum board lineup, alongside other configurations like ALTI-CD0804UD-SPH001 (8 trunks, 4 extensions) and ALTI-CD0012UD-SPH001 (12 extensions), providing flexible trunk/extension mixes to tailor capacity to site needs.