FXS Module

S2 Module | 2 FXS Ports | Add 2 analog telephones.

FXO Module

O2 Module | 2 FXO Ports | Connect 2 analog PSTN (POTS) lines.

PSTN Lifeline

SO Module | 1 FXS Port & 1 FXO Port | Unique PSTN Fallback Function.

BRI Module

B2 Module | 2 BRI Ports | 2 x NT/TE BRI Ports.

GSM Module

GSM Module | 1 GSM Channel | 1 Channel for GSM Voice Calls Frequency: 850/900/1800/1900 MHz (quad-band).

3G Module

3G Module | 1 WCDMA Channel | 1 Channel for WCDMA Voice Calls Frequency: 900/2100 MHz, 850/2100 MHz, 850/1900 MHz.

4G Module

4G LTE Module | 3G/4G Voice Call & Data | Insert 4G module on Slot_1 of S20&S50 and Slot_1 of EXP 1 of S100 & S300.

EX30

EX30 has 1 onboard E1/T1/PRI port | Supported Model: S100 and S300

EX08

EX08 has 4 onboard module slots and 8 interfaces on the panel | Supported Model: S100 and S300