The Yeastar SO is a single card with one FXO port for a landline and one FXS port for an analog phone or fax, installed inside Yeastar P-Series and S-Series PBXs. It fits a small office with one landline and one fax machine.
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The Yeastar SO module puts two different ports on one card: an FXO port where the landline comes in, and an FXS port that feeds an extension out to an analog phone or fax. It is made for the small office or clinic with one landline number and one fax machine.
How the SO works
The FXO port receives the STC landline and makes it available to every extension for calling in and out. The FXS port supplies dial tone to an analog device, so the fax or desk phone works as an internal extension.
- One FXO port for a landline.
- One FXS port for a phone or fax.
- PSTN fallback function.
Compatible Yeastar PBXs
The SO goes straight into the P520 (up to 2 modules) and P550 (up to 4). The P560 and P570 need an EX08 board, holding up to 4 modules on the P560 and 8 on the P570. It also works in the S20, S50 and S300 (via EX08).
Why the SO suits small PBXs
The P520 and S20 have only two module slots. Fit an O2 and an S2 and both are gone. The SO gives you a landline and a fax in one slot, leaving the second free for a 4G module or another card later.
SO vs O2 vs S2
Pick the O2 for two landlines, the S2 for two phones or fax machines, and the SO when you need one of each.
Frequently Asked Questions
What do the FXS and FXO ports on the SO do?
The FXO port takes the incoming STC landline; the FXS port connects an analog phone or fax as an extension.
Does the SO fit a Yeastar S20?
Yes. The S20 takes up to two modules and the SO is on its supported list.
Do I need an EX08 board for the SO?
Not on the P520, P550, S20 or S50. Yes on the P560, P570 and S300, where modules mount on the EX08.
Specifications
- Model: SO
- Type: Internal telephony module for Yeastar PBXs
- Ports: 1 × FXS + 1 × FXO
- Connector: RJ11 on the PBX panel
- Use: FXO: analog PSTN line or a legacy PBX FXS port; FXS: analog phone or fax
- Extra function: PSTN fallback
- 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
- Configuration: FXO port as an FXO trunk, FXS port as an FXS extension
- Installation: Inside the PBX in a module slot after removing the top cover (on the EX08 board in P560, P570 and S300)
Features
- 1 FXO + 1 FXS port: a landline and a phone or fax on one module.
- Saves a slot in small PBXs: on the 2-slot P520 you get a landline and a fax and still have a slot free.
- PSTN fallback function, which Yeastar lists for the SO and not for its other modules.
- Fits the P520 and P550 directly, and the P560 and P570 on an EX08 board.