4-Port POTS Telephone Extender over Ethernet LAN or IP, FXS + FXO Pair

4-Port POTS Telephone Extender over Ethernet LAN or IP, FXS + FXO Pair

• FOUR ANALOG PHONE LINES OVER YOUR EXISTING NETWORK - Carries 4 real POTS lines (RJ11) across an ordinary Ethernet LAN, so handsets, fax machines, alarm diallers and elevator phones keep working after the copper is gone. Dial tone, ring voltage and caller ID pass through exactly as on a physical pair. Fax transmission supported as well.
• SUPPLIED AS A MATCHED FXO/FXS PAIR - TWO UNITS - The FXO unit terminates the CO or PABX side; the FXS unit terminates the CPE side (phone sets, fax). Both units are included and are required - the system does not function single-ended.
• TDM OVER IP ON A PRIVATE LAN - NOT VoIP, NOT SIP - No SIP registration, provider account or subscription. Both units must reside on the same IP subnet. Do NOT use an internet/WAN connection as the uplink; the transport is not designed to traverse a routed public link.
• FX PORT ACCEPTS A 155M (100FX) SFP - MODULES SOLD SEPARATELY - The FX uplink takes a 155 Mbps Fast Ethernet SFP for transport over dark or active fiber. Two matching transceivers are required, one per unit, and are NOT included; the cage ships empty. Transceiver parameters must match at both ends. All Ethernet/IP and direct RJ-45 modes operate without any module fitted.
• WEB-MANAGED, PRE-CONFIGURED AT THE FACTORY - Units ship with matched IP addresses already set. Subnet, frame length and timing parameters are changed through the built-in web manager. No console cable, terminal software or driver installation.
• PACKET RECOVERY AND DELAY COMPENSATION - Out-of-order packet recovery and an anti-delay cache maintain voice integrity on a loaded LAN. Adjustable frame length trades bandwidth against transport latency. Automatic re-establishment after power loss or network interruption.
• IN THE BOX - Two units (one FXS, one FXO), AC power cords and the manual. Input AC 90-265V, under 7 W, -10 to 60 C operating, humidity 5-95%, 216 x 140 x 31 mm. Ethernet interface 10/100 Mbps half/full duplex, IEEE 802.3, RJ45 - observe the 100 m limit on a direct RJ-45 uplink.