The Yeastar S2 slots inside a Yeastar PBX and adds two FXS ports, so two analog phones or a fax machine run as normal PBX extensions. It is handy when you move to an IP PBX but still need those analog devices.
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The Yeastar S2 FXS module is the simplest way to run a regular analog phone or fax machine on a Yeastar PBX. It has two FXS ports, and each port becomes an internal extension with its own number, just like an IP phone.
FXS vs FXO for buyers
An FXS port supplies a line to a device: plug in an analog phone or fax and it gets dial tone and can call. An FXO port does the opposite and receives a line from outside, such as an STC landline, which is what the O2 module is for.
- 2 FXS ports for two phones, or a phone and a fax.
- Each port is set up in the PBX as an FXS extension.
- Green LED per port.
Where the S2 fits
On the P520 (up to 2 modules) and P550 (up to 4) it goes straight into the module slot. On the P560 and P570 it mounts on the EX08 board, up to 4 modules on the P560 and 8 on the P570. The S20, S50 and S300 (via EX08) support it too.
Common uses
- The fax machine in accounts or purchasing.
- An analog phone in a guard room or warehouse.
- Older handsets you want to keep for a while after the new PBX goes in.
S2, SO or an FXS gateway?
The S2 gives you two FXS ports. The SO gives you one FXS port plus one FXO port for a landline. If you have many analog phones, an FXS gateway such as the Yeastar TA800 saves your PBX module slots.
Frequently Asked Questions
Can I connect a fax machine to the S2?
Yes. FXS ports are made for analog phones and fax machines, and the fax shows up as an extension on the PBX.
Does the S2 fit a P520?
Yes. The P520 takes up to two modules in its internal slots with no expansion board.
Can the S2 take an STC landline?
No. The S2 has FXS ports for devices only. A landline needs the FXO port on an O2 or SO module.
Specifications
- Model: S2
- Type: Internal telephony module for Yeastar PBXs
- Ports: 2 × FXS
- Connector: RJ11 on the PBX panel
- Use: Analog phones and fax machines
- Compatible PBXs: P520 and P550 (direct), P560 and P570 (on EX08 board), S20, S50, S412, S300 (on EX08 board)
- Max. modules per PBX: P520: 2, P550: 4, P560: 4, P570: 8, S20: 2, S50: 4
- LED (FXS): Solid green: device idle; blinking: device busy
- Configuration: FXS Extension type bound to an FXS port under Extension and Trunk > Extension
- Installation: Inside the PBX in a module slot after removing the top cover (on the EX08 board in P560, P570 and S300)
Features
- 2 FXS ports: two analog phones, or a phone plus a fax, each as its own extension.
- A full FXS extension in the PBX: extension number, voicemail and routing like any IP phone.
- Fits the P520 and P550 directly, and the P560 and P570 on an EX08 board: no external gateway for a few devices.
- Up to 16 FXS ports on a P570 (8 modules), so an older building's phones can move over in stages.
- Green LED per port: steady when the device is idle, blinking during a call.