Telephone Extension Modules & Expansion Cards

NEC IP7WW-308U-A1 3 Analog Trunks 8 Hybrid Extensions Card

Telephone Extension Modules & Expansion Cards

Panasonic KX-TE82480SX 2×8 Expansion Card

Telephone Extension Modules & Expansion Cards

Panasonic KX-NS5170 4 Port Hybrid Extension Card (DHLC4)

Telephone Extension Modules & Expansion Cards

Panasonic KX-NS5172X 16-Port Digital Extension Card (DLC16)

Telephone Extension Modules & Expansion Cards

Yeastar EX08 Expansion Card

Telephone Extension Modules & Expansion Cards

Yeastar D30 Extension Expansion Module

Telephone Extension Modules & Expansion Cards

Yeastar GSM Module for S-Series PBX

Telephone Extension Modules & Expansion Cards

Yeastar O2 Module 2FXO (YST-O2)