The Yeastar O2 is a small plug-in card that adds two FXO ports to a Yeastar PBX, so two analog landlines connect straight into the system. It suits companies moving to an IP PBX that want to keep their existing landline numbers.
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The Yeastar O2 FXO module adds two FXO ports to a Yeastar PBX, which means room for two analog landlines. It mounts inside the PBX, and once the provider's line is plugged in, every extension can use it.
FXO vs FXS in plain words
An FXO port is where a telephone line comes in. The landline from the wall plugs into it, just as it would into an ordinary phone. An FXS port works the other way round: it feeds a line out to an analog phone or fax machine, which is the job of the S2 module.
- 2 FXO ports, one landline per port.
- Can also take an FXS line from an older legacy PBX.
- A red LED per port shows line status.
Which Yeastar PBXs take the O2
The O2 slots straight into the module bays of the P520 (up to 2 modules) and P550 (up to 4). On the P560 and P570 it sits on the EX08 expansion board, with up to 4 modules on the P560 and 8 on the P570. It also fits the S20 and S50, and the S300 through an EX08 board.
O2 module or an FXO gateway?
For 2 to 4 landlines ending in the PBX room, the module is simpler: no extra box, adapter or network cable. For a large number of lines, or lines that arrive in another building, an FXO gateway such as the Yeastar TA810 is the better fit.
O2 vs SO
The O2 carries two FXO ports for two landlines. The SO pairs one FXO port with one FXS port, so a single module handles one landline and one analog phone.
Frequently Asked Questions
How many landlines does the O2 support?
Two, one per FXO port. For more lines, add modules up to the PBX limit, for example up to 4 modules in a P550.
Does the O2 plug straight into a P560?
No. On the P560 and P570 you fit the EX08 expansion board first, then install the module on it.
Can I plug an analog phone into it?
No. FXO ports take incoming lines only. For an analog phone or fax you need an S2 or SO module with an FXS port.
Specifications
- Model: O2 (YST-O2)
- Type: Internal telephony module for Yeastar PBXs
- Ports: 2 × FXO
- Connector: RJ11 on the PBX panel
- Use: Analog PSTN lines, or the FXS ports of a legacy PBX
- Compatible PBXs: P520 and P550 (direct), P560 and P570 (on EX08 board), S20, S50, S300 (on EX08 board)
- Max. modules per PBX: P520: 2, P550: 4, P560: 4, P570: 8, S20: 2, S50: 4
- LED (FXO): Solid red: line idle; slow blink: no line connected; fast blink: line busy
- Configuration: Appears as an FXO trunk under Extension and Trunk > Trunk, then added to inbound and outbound routes
- Installation: Inside the PBX in a module slot after removing the top cover (on the EX08 board in P560, P570 and S300)
Features
- 2 FXO ports: connect two analog landlines, one line per port.
- Fits the P520 and P550 directly, and the P560 and P570 on an EX08 board: one module across the P-Series.
- Also fits the S20, S50 and S300 (via EX08), for sites already running an S-Series PBX.
- Up to 16 FXO ports on a P570 (8 modules on two EX08 boards) as your line count grows.
- Red LED per port shows at a glance whether the line is idle, busy or unplugged.