Virtual PBX Knowledge 22/06/2026

Advantages and disadvantages of the OMICall PBX system versus the Kamailio open-source PBX

Reading time: 4 minutes

1. Understanding the OMICall PBX system and the Kamailio open-source PBX system: What are they?

The new OMICall call center system, based on a cloud-based platform, is commonly used in businesses for intelligent customer service virtual call centers. It helps businesses save on call costs, optimize operations, increase call answer rates, offers convenience, and easily integrates with other systems.
Kamailio open-source PBX is an open-source SIP server released under the GPL, building large platforms for VoIP, easily used to replicate SIP-to-PSTN gateways, PBX systems, or media servers such as Asterisk, FreeSWITCH, or SEMS.

Advantages and disadvantages of the OMICall PBX system versus the Kamailio open-source PBX system

2. Advantages and disadvantages between the OMICall PBX system and the Kamailio PBX software

	Kamalio PBX software	OMICall call center system
Advantage	Powerful features: Asynchronous TCP, UDP, and SCTP; secure communication over TLS for VoIP; least expensive routing, load balancing, failover, and even authentication and authorization for enhanced security; WebSocket support for WebRTC; IPv4 and IPv6; SIMPLE messaging and presence with embedded XCAP server and MSRP forwarding.	Fully cloud-based operation, integrated CRM customer management features. Easily scalable without hardware upgrades. No limitations on the number of phones due to the use of IP phones (SIP). Easy system monitoring and management via web administration. Saves call center personnel: Thanks to automated mechanisms such as Automatic Call Answering (IVR), Automatic Call Distribution (ACD), Voicemail, etc.
Disadvantages	Kamailio requires more in-depth knowledge of the SIP protocol itself to fully utilize the platform, as it is written in pure C for Unix/Linux-like systems with architectural optimizations.	Because the system is based on a cloud-based platform using an internet connection, the transmission may occasionally experience leaks or echoes. Virtual call centers used by some companies are also vulnerable to hackers stealing security information. Assets are not located at the company headquarters and cannot be physically seen, touched, or measured.

3. Features of Kamailio PBX software with OMICall PBX system

a. Features of the Kamailio open-source PBX system

SIP Routing Capabilities: Stateless and transactional proxy handling, NAT transport support for SIP and RTP traffic, load balancing with multiple distribution algorithms and failover support, flexible low-cost routing.
Extended APIs: Perl programming interface – embed your extensions written in Perl, Java SIP Servlet application interface – write Java SIP Servlets to extend your VoIP services and integrate with web services, Lua and JavaScript programming interfaces.
Multiple Databases: MySQL, PostgreSQL, SQLite, UnixODBC, BerkeleyDB, Oracle (text files), connectors for Memcached, Redis, MongoDB, and Cassandra no-SQL backends.

b. Features of OMICall Call Center Software

Extension allocation feature, call forwarding to employee’s personal phone if all extensions are offline.
Easy to make and receive calls via regular personal phone.
Social media integration:
Connect to Facebook Messenger Fanpage for customer service.
Sales staff can manage and only see their assigned customers.
When a customer calls the hotline, the call is transferred to the correct sales representative.
Easy customer management. All outgoing and incoming calls from all staff are recorded and reported, helping to improve service quality.

4. The OMICall virtual call center system integrates many new features for businesses:

Upon further investigation, the open-source PBX system kamailio requires more in-depth knowledge of the SIP protocol itself to fully utilize the platform. OMICall will help you use a virtual PBX more easily without needing to code or have in-depth understanding of the protocols.

OMICall is an intelligent virtual customer service call center that operates entirely on a cloud computing platform, maintaining the strongest possible connection.
It helps businesses save on call costs, optimize operations, increase call answer rates, is convenient to use, and easily integrates with other systems.
“Best support” and the largest bandwidth in the field of intelligent virtual call centers, along with two-factor authentication to prevent customer information theft.
Real-Time Reporting: Every call is stored and reported in real time, allowing for tighter control, easy monthly expense reporting, reconciliation, or invoicing. Businesses can easily manage sales and telesales intelligently and efficiently, improving work quality.
Integrated customer funnel filtering and call scripting: Businesses can adjust the customer funnel by priority order to easily nurture and offer promotions to customers according to the funnel script.
Call center hold music feature: Instead of the “Beep Beep Beep” sound when calling the call center, we support the Branded Hold Music feature.

VIHAT TECHNOLOGY Co., Ltd

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