Every sales call and support request passes through your phone system, so the wrong PBX keeps costing you long after purchase. This IP PBX buying guide covers the four questions that decide the right model for a Saudi business, then compares two series sold at Misbar: Yeastar P-Series and Grandstream UCM6300.

What an IP PBX does

An IP PBX runs your company's calls over the office network instead of telephone wiring. Each employee gets an extension on a desk IP phone, a mobile app or a computer, and the PBX routes calls between departments. Adding a new hire takes a setting, not a cabling job, and staff can answer the company number from their mobile.

IP PBX buying guide: four questions to answer first

1. How many users, today and in three years?

Count everyone who needs an extension, plus reception, the warehouse and the meeting room. Size for growth: replacing the PBX after a year costs more than buying extra capacity now.

2. How many concurrent calls?

Concurrent calls are the calls happening at the same moment. In most offices this sits well below the user count, since not everyone calls at once. Call centers need a figure close to their headcount.

3. Which lines will you connect?

• STC landlines: you need FXO ports.
• Mobile SIMs from STC, Mobily or Zain: you need a 4G port on the PBX or a separate GSM/4G gateway.
• A SIP trunk from your provider: it connects over the internet, with no extra ports.
• Existing analog phones you want to keep: you need FXS ports.

4. Does your team work outside the office?

With sales reps on the road or branches in Riyadh, Jeddah and Dammam, pick a PBX with mobile and desktop apps so each extension travels with its owner.

Yeastar and Grandstream models by the numbers

• Yeastar P550: 50 users and 25 concurrent calls, with up to 8 FXS, 8 FXO and 4 cellular ports depending on the modules installed.
• Yeastar P560: 100 users (expandable to 200) and 30 concurrent calls (expandable to 60), plus support for one E1 port.
• Yeastar P570: 300 users (expandable to 500) and 60 concurrent calls (expandable to 120).
• Grandstream UCM6301: 500 users and 75 concurrent calls, with 1 FXO and 1 FXS port.
• Grandstream UCM6302: 1,000 users and 150 concurrent calls, 2 FXO and 2 FXS ports, and video meetings for up to 30 participants.
• Grandstream UCM6304: 2,000 users and 300 concurrent calls, 4 FXO and 4 FXS ports, and video meetings for up to 60 participants.
• Grandstream UCM6308: 3,000 users and 450 concurrent calls, 8 FXO and 8 FXS ports, and video meetings for up to 80 participants.

Yeastar or Grandstream: which one fits?

Choose Grandstream UCM6300 for high user and call capacity in one unit, built-in analog line ports, and video meetings hosted on the PBX. The Wave app handles calls on mobile and desktop, and UCM RemoteConnect secures remote access.

Yeastar P-Series suits companies that want to add landline or 4G SIM modules only where needed. It offers Linkus apps for mobile, desktop and web, call center tools such as skill-based routing and a real-time wallboard, and CRM integrations with Zoho, Salesforce, HubSpot and Odoo. Some features depend on the subscription plan, so ask which plan covers them when you order.

Quick picks by company size

• Up to 50 employees: Yeastar P550, or Grandstream UCM6301 if you expect fast growth.
• 50 to 200 employees: Yeastar P560 or Grandstream UCM6302.
• Large companies, multiple branches or call centers: Yeastar P570, or Grandstream UCM6304 and UCM6308.

Buy Yeastar and Grandstream PBX systems from Misbar

Misbar sells the Yeastar P550, P560 and P570 and the Grandstream UCM6301, UCM6302, UCM6304 and UCM6308, plus the IP phones, PBX modules and gateways that complete the system. Pay with mada or Apple Pay, or split it into up to 12 monthly payments with tabby. Fitting out a whole office? Message us on WhatsApp for a quote on the PBX, phones and gateways.

FAQ

Do I need new phones with the PBX?

Not necessarily. The PBX works with desk IP phones and the mobile app, and FXS ports keep your analog handsets in use.

Can I connect an STC or Mobily SIM to the PBX?

Yes. The Yeastar P550 and P560 support up to 4 cellular ports through modules. With Grandstream, you connect the SIM through a 4G gateway linked to the PBX.

What is the difference between users and concurrent calls?

Users are the extensions registered on the PBX. Concurrent calls are the calls that can run at the same moment.