Yeastar P550 vs P560 vs P570: Which P-Series PBX for a Kuwait Office?

Yeastar's P-Series appliances are the practical middle ground for a Kuwait business moving off an old analogue or legacy PBX: on-premise hardware, SIP trunks, a proper softphone client, and no per-seat cloud bill. We stock three of them — the P550, the P560 and the P570 — and the datasheets make them look like a simple small, medium, large ladder. They are not, and buying on the user count alone is how offices end up with busy tones.

Quick comparison table

All three run the Linkus UC client on desktop and mobile, and all three ship with the free Basic feature plan, with Standard, Enterprise and Ultimate available as paid upgrades.

The number that actually matters: concurrent calls

Look at the third row of that table. It is the one nobody quotes and the one that decides whether the system works.

The P550 supports 50 users and 25 concurrent calls — one call for every two staff. For most offices that is generous. The P560 doubles the user ceiling to 100 but only lifts concurrent calls from 25 to 30, which is one call for every 3.3 staff. The P570 goes to 300 users on 60 calls, a ratio of five to one.

Those ratios are fine for a normal office, where most people are not on the phone at the same moment. They are not fine for a sales floor, a dispatch desk, a clinic reception or a collections team, where a large share of the staff are on a call simultaneously by design.

So the question to answer before you choose is not "how many extensions do we need". It is "how many of these people are on a call at the same time on a busy morning". Count the busy hour, not the headcount.

A 90-person office with ordinary phone habits is comfortable on a P560. A 60-person operation where 35 of them are in a call centre is not — it needs the concurrent-call capacity of a P570, or a P560 with the module below.

The D30 module changes the answer — 85.00 KWD

This is the part that is easy to miss. The D30 is a DSP capacity module that fits the internal D-Slot under the top cover, and each one adds 100 users and 30 concurrent calls.

The P560 takes one. With it fitted, the P560 goes from 100 users and 30 concurrent calls to 200 users and 60 concurrent calls — the same concurrent-call capacity as a P570, for 360.00 plus 85.00 KWD instead of 677.00 KWD.

If your constraint is concurrent calls rather than user count or the P570's extra features, a P560 plus a D30 is the cheaper route to the same call capacity. It is worth running both numbers before you sign off on a P570.

The P570 takes up to two D30 modules. By the same per-module arithmetic that is a further 200 users and 60 calls, but ask us to confirm the supported ceiling against Yeastar's documentation before you design a system around the maximum.

The P550 does not accept the D30. If you outgrow 25 concurrent calls on a P550, you are changing the appliance, not expanding it. That is the single strongest argument for starting at the P560 if you expect to grow.

Budget for the feature plans, not just the box

Each appliance ships with the free Basic plan. The features Kuwait buyers most often assume are included are not:

None of that is hidden, but it does mean the hardware price is not the system price. If the brief you were given says "PBX with video meetings and call queues", get the plan quoted at the same time as the appliance, or the project comes in over budget at the worst possible moment.

Bringing your existing landlines in

Most Kuwait offices replacing a PBX still have analogue lines they want to keep — a published main number on a landline, a fax line, a lift or alarm line. There are two ways to connect them and the right one depends on where the lines physically terminate.

Two lines, and the PBX is in the same rack: the S-O2 module — 29.00 KWD

Two FXO ports on RJ11, hot-swappable, fits the P-Series directly. If you have one or two analogue lines arriving at the same rack as the PBX, this is the cheapest and tidiest answer — no extra box, no extra IP address, nothing else to power.

More lines, or lines in a different room: an FXO gateway

A gateway sits anywhere on the LAN, so it is the answer when the incoming lines land in a different part of the building from the PBX. Running a long analogue extension back to the rack is worse than putting a gateway where the lines already are.

Both support T.38, which matters more in Kuwait than most places — a lot of government and bank correspondence still arrives by fax, and T.38 is how you keep a fax line alive on a VoIP system.

Mobile and 4G trunks: the TG200LTE-A — 210.00 KWD

Two 4G LTE channels, two SIM slots, SIP and IAX2, SMS send and receive through a built-in HTTP API, least-cost routing, and failover when the landline or SIP trunk is down. It is the box you use to terminate mobile calls on-net, so staff calling mobile numbers do not go out over a landline tariff, and to keep the phones working when the fixed line fails.

Check the module variant before you order. Our listing specifies Module-A, with LTE bands B2, B4 and B12. Those are not the bands Kuwait's operators run — as covered in our Kuwait 5G and LTE router guide, the LTE bands in use here are Band 3, Band 7 and Band 20. Yeastar builds the TG series with different radio modules, so ask us to confirm the band variant for Kuwait before you place the order. Do not assume the listed module will register on a Zain, Ooredoo or stc SIM.

When the appliance is the wrong answer: P-Series Cloud Edition

If you have no comms room, several small sites, or mostly remote staff, there is no reason to buy and rack an appliance. The Cloud Edition is the same P-Series feature set hosted by Yeastar, scaling from 20 to 10,000-plus users, with Linkus, built-in video, a call centre and omnichannel messaging over WhatsApp, SMS and live chat.

It is billed per user per month rather than as a capital purchase — our listing shows 17.00 KWD per user per month at the time of writing, and the real figure depends on user count and the plan you pick, so ask us for a quote against your actual seat count.

The trade-off is the usual one. An appliance is a one-off cost you own and a dependency on your own power and internet. The cloud edition is an ongoing cost with no hardware, and a dependency on your internet connection alone. For a single Kuwait office with a comms room and a decent fibre line, the appliance is normally cheaper over three years. For a business with four shops and no IT staff, it normally is not.

Our recommendation

All the part numbers in this article are published and in stock at the time of writing. The wider Yeastar range we list — the S-Series appliances, the P520, the TA FXS gateways, the larger TG LTE gateways and the EX08 expansion board — is supplied to order, and those pages are marked accordingly. Ask us for the lead time before you fix an installation date.

Prices move. Confirm the current figure with us before you build it into a budget.