- 100 (up to 200) Users - 30 (up to 60) Max Concurrent Calls - 8 Max Analog Ports - 8 Max BRI Ports - 4 Max GSM/3G/4G Ports - 1 Max E1/T1/J1 Port (optionnal) - 1 USB (Up to 2TB) - 1 SATA (Up to 2TB) - NFC...

- 50 Users - 25 Max Concurrent Calls - 8 Max Analog Ports - 8 Max BRI Ports - 4 Max GSM/3G/4G Ports - 1 USB (Up to 2TB) - NFC Read/Write - 2 X 10/100/1000 - Optional modules for specific config.

- Two RJ-11 FXS ports -  Two  10/100 Mbps RJ-45 Ethernet ports - Power button: Reset / Problem Reporting (PRT) - LED indicators: Power, Network, Phone 1, Phone 2, PRT - Wall mountable

- Two RJ-11 FXS ports - One 10/100 Mbps RJ-45 Ethernet port - Power button: Reset / Problem Reporting (PRT) - LED indicators: Power, Network, Phone 1, Phone 2, PRT - Wall mountable

- Dual Gigabit autosensing RJ45 / Integrated NAT router - TLS and SRTP security encryption - Automated provisioning by HTTP/TFTP with XML - E1/T1/J1 ports, support PRI, SS7, MFC R2 - Supports voice codecs...

- Dual Gigabit autosensing RJ45 / Integrated NAT router - TLS and SRTP security encryption - Automated provisioning by HTTP/TFTP with XML - E1/T1/J1 ports, support PRI, SS7, MFC R2 - Supports voice codecs...

- Dual Gigabit autosensing RJ45 / Integrated NAT router - TLS and SRTP security encryption - Automated provisioning by HTTP/TFTP with XML - E1/T1/J1 ports, support PRI, SS7, MFC R2 - Supports voice codecs...

- 8 BRI - 16 VoIP Calls or 8 SIP-SIP calls - 8 Transcoded Calls - High Precision 5ppm Clock - 2x Gig Ethernet - 1x USB port - SN5531/8BIS16VHP/EUI: 8 X ISDN BRI/S0 ports

- 4 BRI - 8 VoIP Calls or 4 SIP-SIP calls - 4 Transcoded Calls - High Precision 5ppm Clock - 2x Gig Ethernet - 1x USB port - SN5531/4BIS8VHP/EUI: 4 X ISDN BRI/S0 ports

- 2 BRI - 4 VoIP Calls or 4 SIP-SIP calls - 2 Transcoded Calls - High Precision 5ppm Clock - 2x Gig Ethernet - 1x USB port - SN5531/2BIS4VHP/EUI: 2 X ISDN BRI/S0 ports

- 1 E1/T1 PRI - High Precision 5ppm Clock - 1x Gig Ethernet - 1x USB port - SN4171/1E30VHP/EUI: 30 VoIP Calls NOT upgradeable

- 1 E1/T1 PRI - High Precision 5ppm Clock - 1x Gig Ethernet - 1x USB port - SN4171/1E15VHP/EUI: 15 VoIP Calls upgradeable to 30

- 1 E1/T1 PRI - High Precision 5ppm Clock - 1x Gig Ethernet - 1x USB port - SN4171/1E15VHP/EUI: 15 VoIP Calls NOT upgradeable

- 16 VoIP Calls or 4 SIP-SIP calls - 1x Gig Ethernet - 1x USB port - High Precision 5ppm Clock - SN4131/8BIS16VHP/EUI: 8 X ISDN BRI/S0 ports

- 8 VoIP Calls or 4 SIP-SIP calls - 1x Gig Ethernet - 1x USB port - High Precision 5ppm Clock - SN4131/4BIS8VHP/EUI: 4 X ISDN BRI/S0 ports

- 4 VoIP Calls or 4 SIP-SIP calls - 1x Gig Ethernet - 1x USB port - High Precision 5ppm Clock - SN4131/2BIS4VHP/EUI: 2 X ISDN BRI/S0 ports

- Supports 2 SIP profiles through 1 FXS port and 1 FXO port - Dual 100Mbps LAN and WAN ports - Lifeline support in case of power outage - 3-way voice conferencing per port - Automated & secure...

- Up to 16 users - Up to 8 FXS ports - Up to 4 FXO ports - Up to 4 BRI ports - Up to 2 GSM ports - Up to 4 VoIP Trunks - Pre-configured with 4 FXS ports - V4: LTE SIP Trunking not supported - 2...

- Supports 2 SIP profiles and 8 FXS ports - Strong AES encryption - Automated & secure provisioning options - 3-way voice conferencing per port - Exceptional voice quality with wide band HD codec -...

- 1 SIP profile / 1 FXS port and a single 10/100Mbps port - TLS and SRTP security encryption technology - Automated provisioning options - Supports 3-way voice conferencing - Failover SIP server...

- 16 GSM/UMTS/WCDMA Ports - GSM 850/900/1800/1900 MHz - WCDMA 850/1900 MHz, 850/2100 MHz, 900/2100 MHz - 2 X 10/100

- 8 GSM/UMTS/WCDMA Ports - GSM 850/900/1800/1900 MHz - WCDMA 850/1900 MHz, 850/2100 MHz, 900/2100 MHz - 2 X 10/100

- 4 GSM/UMTS/WCDMA Ports - GSM 850/900/1800/1900 MHz - WCDMA 850/1900 MHz, 850/2100 MHz, 900/2100 MHz - 1 X 10/100

- 2 GSM/UMTS/WCDMA Ports - GSM 850/900/1800/1900 MHz - WCDMA 850/1900 MHz, 850/2100 MHz, 900/2100 MHz - 1 X 10/100

- 1 GSM/UMTS/WCDMA Port - GSM 850/900/1800/1900 MHz - WCDMA 850/1900 MHz, 850/2100 MHz, 900/2100 MHz - 1 X 10/100

- 4 BRI Ports (TE/NT) - 1 X 10/100

- 2 BRI Ports (TE/NT) - 1 X 10/100

- 2 E1/PRI/T1/J1 Ports - 2 X 10/100/1000

- 1 E1/PRI/T1/J1 Port - 2 X 10/100

- 16 FXO Ports - 1 X 10/100

- 8 FXO Ports - 1 X 10/100

- 4 FXO Ports - 1 X 10/100

- 32 FXS Ports - 1 X 10/100

- 24 FXS Ports - 1 X 10/100

- 16 FXS Ports - 1 X 10/100

- 8 FXS Ports - 1 X 10/100

- 4 FXS Ports - 1 X 10/100

- 2 FXS Ports - Micro-USB port (Power) - 1 X 10/100

- 1 FXS Port - Micro-USB port (Power) - 1 X 10/100

- Module for Yeastar iPBX  S-Series / P-Series - Add 100 VoIP Users - Add 30 Concurrent Calls

- Module for Yeastar iPBX  S-Series / P-Series - 1 onboard E1/T1/PRI Port

- Module for Yeastar iPBX  S-Series / P-Series - 4 onboard module slots - 8 interfaces on the panel

- Module for Yeastar iPBX - 1 WCDMA Channel (WCDMA Voice Calls Frequencies 900/2100MHz - 850/2100MHz - 850/1900MHz)

- Module for Yeastar iPBX - 1 GSM Channel (GSM Voice Calls Frequencies 850/900/1800/1900MHz - Quad-band)

- Module for Yeastar iPBX - 2 BRI Ports (NT/TE)

- Module for Yeastar iPBX - 1 FXS Port + 1 FXO Port (Unique PSTN Fallback Function)

- Module for Yeastar iPBX - 2 FXO Ports (connect 2 analog PSTN (POTS) lines)

- Module for Yeastar iPBX - 2 FXS Ports (add 2 analog telephones)

- 300 (up to 500) Users - 60 (up to 120) Max Concurrent Calls - 24 Max Analog Ports - 24 Max BRI Ports - 6 Max GSM/3G Ports - 3 Max E1/T1/J1 Ports - 100 VoIP Trunks - Optional modules for specific...

- 100 (up to 200) Users - 30 (up to 60) Max Concurrent Calls - 16 Max Analog Ports - 16 Max BRI Ports - 6 Max GSM/3G Ports - 2 Max E1/T1/J1 Ports - 100 VoIP Trunks - Optional modules for specific...

- 50 Users - 25 Max Concurrent Calls - 8 Max Analog Ports - 8 Max BRI Ports - 4 Max GSM/3G Ports - 50 VoIP Trunks - V4: LTE SIP Trunking not supported - Optional modules for specific config.

- 20 Users - 10 Max Concurrent Calls - 4 Max Analog Ports - 4 Max BRI Ports - 1 Max GSM/3G Port - 20 VoIP Trunks - V4: LTE SIP Trunking not supported - Optional modules for specific config.

- 4 SIP profiles and 4 FXS ports - Strong AES encryption - Automated & secure provisioning options - 3-way voice conferencing - Exceptional voice quality with wideband HD codec - Supports T.38 Fax for...

- 800 users, 50 SIP trunks, 100 concurrent calls - Dual Gigabit integrated PoE - Supports up to a 5-level IVR - Built-in call recording server - Supports call queue - Built-in Call Detail Records (CDR) -...

- 500 users, 50 SIP trunks, 45 concurrent calls - Dual Gigabit integrated PoE - Supports up to a 5-level IVR - Built-in call recording server - Supports call queue - Built-in Call Detail Records (CDR) -...

- 500 users, 50 SIP trunks, 30 concurrent calls - Dual Gigabit integrated PoE - Supports up to a 5-level IVR - Built-in call recording server - Supports call queue - Built-in Call Detail Records (CDR) -...

- 2 SIP profiles and 2 FXS ports - Strong AES encryption - Automated & secure provisioning options - 3-way voice conferencing - Exceptional voice quality with wideband HD codec - Supports T.38 Fax for...

- 2 SIP profiles / 2 FXS ports and a single 10/100Mbps port - TLS and SRTP security encryption technology - Automated provisioning options - Supports 3-way voice conferencing - Failover SIP server...

- 1GHz quad-core Cortex A9 (1GB DDR3 RAM, 32GB Flash) - Integrated T1/E1/J1 / FXO & FXS ports - Gigabit network, integrated PoE, USB, SD - Supports up to 50 SIP trunk accounts - Integrated NAT router...

- 15 to 120 VoIP calls - WAN Access - VoIP Transcoding Option - Proven Interoperability - QoS and Security - Transparent Telephony Features - High Precision Clock - Flexible Mounting Options -...