The IP500 V2 supports up to 16 analog trunks (Option D) using four ATM4 cards (4 ports each) in its expansion slots. Options A, B, and C represent partial configurations.References: Avaya IP Office IP500 V2 Installation Manual.

The IP500 V2 supports analog extensions via the "Phone 8" card (Option B), which provides 8 analog ports for devices like single-line phones or fax machines. Option A (TCM8) supports digital stations (e.g., Avaya
9500 series), Option C (DS16) is for digital extensions, and Option D (ATM4) is for analog trunks, not extensions.References: Avaya IP Office IP500 V2 Installation Manual.

The default HTTP port for IP Office Web Manager is 8443 (Option D), using HTTPS for secure access.
Option A (80) is standard HTTP, Option B (443) is standard HTTPS, and Option C (8080) is an alternative HTTP port-not defaults for Web Manager.References: Avaya IP Office Web Manager Guide.