{"id":2231,"date":"2026-09-28T05:41:14","date_gmt":"2026-09-28T05:41:14","guid":{"rendered":"https:\/\/www.capanicus.com\/blog\/?p=2231"},"modified":"2026-09-28T12:03:27","modified_gmt":"2026-09-28T12:03:27","slug":"how-to-build-a-multi-tenant-voip-platform","status":"publish","type":"post","link":"https:\/\/www.capanicus.com\/blog\/how-to-build-a-multi-tenant-voip-platform\/","title":{"rendered":"How to Build a Multi-Tenant VoIP Platform"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180a.webp\" alt=\"Multi-Tenant VoIP Platform\" class=\"wp-image-2237\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180a.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180a-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180a-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n<p>&nbsp;<\/p>\n<h2><b>Design\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Challenges of a Multi-Tenant VoIP Platform<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The core idea is to develop a single telephony infrastructure capable of serving multiple tenants securely by keeping each of them completely separate from the others and yet sharing the underlying compute, storage, and networking resources. It is not as such just about providing a feature-rich telecom experience like a traditional PBX system; achieving tenant isolation and ensuring consistent quality of service, as well as keeping maintenance operations straightforward, are much more difficult aspects. This blog is mainly for business and technical decision-makers who are planning or implementing a multi-tenant, VoIP-native cloud-based product.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>Multi-Tenant VoIP Platform: A Closer Look<\/b><\/h2>\n<h3><b>Multi-tenant VoIP<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">A multi-tenant VoIP (Voice over IP) platform, at its heart, is simply a hosted phone system that allows several different companies to have their own virtual office telephone services without them owning any physical equipment, the service provider\u2019s equipment, or their own premises. That means, although they might be sharing the same hardware (servers, switches, etc.), each tenant\u2019s system is completely segregated in their own virtual space.<\/span><\/p>\n<h3><b>Each tenant will typically have a:<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Separate SIP domains (e.g., tenantA.voipdomain.com, tenantB.voipdomain.com)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Unique phone directories and user access control<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Custom<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Call handling features like music on hold, custom greeting messages, different ring groups, and even voicemail systems. Independent CDRs (Call Detail Records), billing, etc.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In other words, each tenant&#8217;s PBX is a mirror image of their company\u2019s office telephone system, and they can access, control, and customize it without any restrictions or need for physical equipment. In a way, it&#8217;s a PBX system, without any PBX hardware. Bear in mind that these systems are based on cloud technology. As with cloud computing, this means the service is highly scalable, and it&#8217;s delivered from the internet. If one\u2019s business grows, the <strong><a href=\"https:\/\/www.capanicus.com\/pbx-callcenter-software-development\">cloud PBX provider<\/a><\/strong> increases their PBX space without noticing, and the cost goes up and down depending on usage, i.e., one\u2019s actual number of \u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200ccalls.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>Main\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Architectural Components<\/b><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2232 size-full\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180b.webp\" alt=\"Main\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Architectural Components For Multi-Tenant VoIP Platform\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180b.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180b-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180b-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>If you plan to build a scalable multi-tenant VoIP service, it makes sense to divide functionalities into four parts:<\/p>\n<ol>\n<li>\n<h3><b> SIP Proxy\/Session Border Controller (SBC)<\/b><\/h3>\n<\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">SBC, like Kamailio or even OpenSIPS, basically represents the entry point in the system:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">SIP endpoint authentication and registration<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Routing of INVITEs to respective tenant contexts<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rate limiting, topology hiding, etc.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Media relay coordination and NAT traversal.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">To handle a very high load of tenants (say &gt;500), the SBC CPU may get overwhelmed by complex regular expressions used for routing decisions. A workaround is to decouple signaling proxies and cache the routing table.<\/span><\/p>\n<ol start=\"2\">\n<li>\n<h3><b> Media Managers (FreeSWITCH \/ Asterisk)<\/b><\/h3>\n<\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Media managers do the following:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Broadcast RTP and translate codecs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Voice response (IVR), conferences, and making call recordings.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The operation of a tenant-specific dial plan.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For isolation between tenants and to have good audio quality for all, you can use different levels of media networks:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Apart from routing the call traffic of big tenants to special media groups, regular tenants will be sharing other general-purpose nodes.<\/span><\/p>\n<ol start=\"3\">\n<li>\n<h3><b> API &amp; Configuration Interface<\/b><\/h3>\n<\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">An API interface will be responsible for the following:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Setting up and taking down the tenants.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The retrieval of dialplans via HTTP (e.g., FreeSWITCH mod_curl, Asterisk Realtime)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Settings per tenant for codecs, routing, and features<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">One more benefit is that by using a central API, the need for exceptions for a tenant will no longer exist, and during updates, the configuration drift problem will not occur<\/span><b>.<\/b><\/p>\n<ol start=\"4\">\n<li>\n<h3><b> Data &amp; Observability Module<\/b><\/h3>\n<\/li>\n<\/ol>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Saving: Use databases for metadata storage of tenants, call detail records (CDRs), and billable usage data. Separate reads from writes via Kafka or Redis. Do use read replicas.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Monitoring: Provide call statistics per tenant, such as MOS values and counts of simultaneous calls as well as errors.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reporting: Offer CDR exports separated per tenant and tenant-level dashboards reporting the usage of \u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200cservices.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>Tenancy Models: Shared vs. Isolated<\/b><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2233 size-full\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180c.webp\" alt=\"Tenancy Models: Shared vs. Isolated\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180c.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180c-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180c-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>Key\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Technical Challenges &amp; Issues &#8211; &amp; Solutions<\/b><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2234 size-full\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180d.webp\" alt=\"Key\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Technical Challenges in Multi-Tenant VoIP Platform\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180d.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180d-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180d-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h3><b>Noisy Neighbor RTP Degradation<\/b><\/h3>\n<p><b>Problem: <\/b><span style=\"font-weight: 400;\">A dialing campaign by the automated call tenant has saturated the server&#8217;s CPU. Other tenants&#8217; audio is now choppy.<\/span><\/p>\n<p><b>Fix:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use tenant-aware SBC routing so that high-volume tenants can be directed into media pools that are specifically dedicated.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Move all AI and DSP-heavy workloads (such as transcription &amp; summarization tasks) that consume GPU resources to isolated GPU clusters using WebSocket audio extraction.<\/span><\/li>\n<\/ul>\n<h3><b>SBC Routing Rule Explosion<\/b><\/h3>\n<p><b>Problem: <\/b><span style=\"font-weight: 400;\">More than 500 tenants having personalized domains plus header manipulations lead the per-packet regex evaluation process to break the latency requirements.<\/span><\/p>\n<p><b>Fix:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Routing decisions could be cached, and decoupled signaling proxies could be used.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">To reduce the logic complexity per invite to a minimum, complex rule processing could be shifted to the backend APIs, which would be used during registration and not per-INVITE.<\/span><\/li>\n<\/ul>\n<h3><b>CDR Database Locking<\/b><\/h3>\n<p><b>Problem: <\/b><span style=\"font-weight: 400;\">A cron job that initiates billing locks the CDR table, so other PBX tasks cannot write the PBX to record new data, and call processing is stopped.<\/span><\/p>\n<p><b>Fix:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Implement event-driven dataflow pipelines in the PBX that send CDR events to Kafka or Redis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Persistence and billing can be performed by downstream workers.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Read replicas can be used for reporting purposes to alleviate database lock issues.<\/span><\/li>\n<\/ul>\n<h3><b>Configuration Drift<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Problem: Tenant-specific exceptions, hardcoded in the dialplan, are making platform upgrades risky and full of errors.<\/span><\/p>\n<p><b>Fix:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tenant settings can be dynamically retrieved via HTTP at call setup.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Source control for all the scripts that handle provisioning. The deployment will be done following patterns to avoid any modifications or changes \u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200cpost-deployment.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>Sample Tech Stack (2026)<\/b><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2235 size-full\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180e.webp\" alt=\"Sample Tech Stack (2026)\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180e.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180e-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180e-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>Operational\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Best Practices<\/b><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2236 size-full\" src=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180f.webp\" alt=\"Operational\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Best Practices for Multi-Tenant VoIP Platform\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180f.webp 1000w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180f-300x169.webp 300w, https:\/\/www.capanicus.com\/blog\/wp-content\/uploads\/2026\/09\/Cap-Blog-180f-768x432.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tenant Onboarding: You may automate domain provisioning, SSL cert issuance, and <strong><a href=\"https:\/\/www.capanicus.com\/mobile-dialer-development\">SIP<\/a><\/strong><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Failover &amp; Resilience: If a failure occurs, you&#8217;ll have to switch over to the standby SBCs and media servers for that cell at once. So, you have to plan active\/standby pairs per cell.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Security: You should do SIP over TLS and SRTP for media. Besides that, you should limit each tenant&#8217;s rate in a way that it cannot overwhelm your system.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">White-Labeling: Resellers will need to be able to change the branding, like the theme, the logo, and the domain per tenant.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">APIs &amp; Integrations: It&#8217;s necessary to provide REST APIs and open up integrations for the CRM, help desk, Microsoft 365\/Google \u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Workspace.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><b>\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c The Reason Behind It for Capanicus<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Capanicus has a strong record of delivering <a href=\"https:\/\/www.capanicus.com\/pbx-callcenter-software-development\">cloud PBX development<\/a> with IVR, queues, and routing workflows. Going from that to a multi-tenant SaaS product will meet the demand for scalable, white-label UCaaS platforms from a new generation of MSP, telco, and vertical SaaS providers requiring embedded voice.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In order to scale beyond hundreds of tenants without degradation in call quality or operational control, Capanicus will have to build a platform with cell-based isolation, API-driven configuration, and event-driven CDR pipelines.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>Your Team&#8217;s Next Steps<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Clarification of tenancy models: Dedicated context first; cell-based scaling by day one.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prototyping of SBC routing: Performance of Kamailio\/OpenSIPS validation for 200-500 tenants.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Development of Tenant Management Module: Automating tenant onboarding, domain binding, and credential issuance, and<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Provisions for observing tenant-level MOS, concurrent calls, and errors<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">AI task planning: The design of a WebSocket audio extraction for possible transcription\/summarization features in the future.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u200b\u200d\u200b\u200c\u200d<\/span><\/p>\n<h2><span data-contrast=\"auto\">Frequently\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Asked Questions (FAQs)<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/h2>\n<h3><span data-contrast=\"auto\">Q: What is a multi-tenant VoIP platform?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: it is one phone system in the cloud that <\/span><span data-contrast=\"auto\">supports a number of different companies with their own virtual PBX, extensions, and features \u2014 without having a separate hardware for each tenant.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: Is multi-tenant VoIP secure?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: If a multi-tenant VoIP service is built with proper isolation between the tenants, then it can definitely be secure. Each tenant&#8217;s SIP domains, user data, CDRs, and billing are logically separated, so there is no access from a tenant to another.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: FreeSWITCH or Asterisk, which one is better?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: FreeSWITCH is often the better choice for a large deployment of multi-tenancy due to its native support for this. On the other hand, Asterisk requires workarounds, or else, you might end up having multiple Asterisk instances which makes it harder to scale.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: Kamailio vs. OpenSIPS for SBC routing?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: Both are routing protocols that are suitable for SBCs but with different areas of applications and different complexities. OpenSIPS, for example, can handle even complicated routing logic. That&#8217;s ideal for CPaaS\/MVNO. On the other hand, the popularity of Kamailio is a factor which might be good enough reason to choose Kamailio for your enterprise SBC and WebRTC gateway roles.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: How many tenants can one platform support?<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: The shared instance is limited to about 100 tenants at maximum. If you want to scale up beyond that, a cell-based architecture is the way to go.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: What is &#8220;noisy neighbor&#8221; degradation? <\/span><\/h3>\n<p><span data-contrast=\"auto\">A: A &#8220;noisy neighbor,&#8221; in this context, would be the high-volume tenant which completely uses up the server resources, thereby making audio calls choppy for others. The only way to prevent that is the tenant-aware routing and cell-based isolation techniques.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: Why does CDR database locking matter?<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: If the billing process locks the CDR table, no more calls can be processed. The answer is to stream CDRs to Kafka\/Redis and read replicas to report against.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: What is the typical tech stack in 2026?<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: Kamailio\/OpenSIPS (SBC), FreeSWITCH (media), Kubernetes (orchestration), Node.js\/Python (API), PostgreSQL (metadata), Kafka\/Redis (events), Prometheus + Grafana (monitoring).<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: What is the automated onboarding process for tenets?<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: With your central API, you can automatise the provisioning of domains, SSL certificates, SIP credentials, dial plans, etc. Deploy Terraform\/IaC-based cells repeatedly for the onboarding of new tenants.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: Is it possible to make the product look like a reseller&#8217;s own by changing some aspects and white-labeling?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: Yes, you can set up per-tenant branding such as themes, logos, and subdomains <\/span><span data-contrast=\"auto\">Additionally, you will be able to offer CRM, helpdesk, and Microsoft 365\/Google Workspace <\/span><span data-contrast=\"auto\">integration through REST APIs.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: Which errors are more fatal and should be avoided?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: Kamailio\/OpenSIPS are usually not treated as full SIP BCS (Session Border Controllers), tenant exceptions are hardcoded<\/span><span data-contrast=\"auto\">, CDR pipelines are skipped by a lack of event-driven approach, cell-based isolation is completely disregarded.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><span data-contrast=\"auto\">Q: How is Capanicus involved here?<\/span><\/h3>\n<p><span data-contrast=\"auto\">A: <a href=\"https:\/\/www.capanicus.com\/\">Capanicus<\/a> demonstrates cloud PBX know-how via the development of IVR, queues, and routing. <\/span><span data-contrast=\"auto\">Constructing a multi-tenant SaaS based on cell isolation with a strong emphasis <\/span><span data-contrast=\"auto\">on API-first config is positioning Capanicus as a solution for the scalable UCaaS.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>&nbsp; Design\u200b\u200d\u200b\u200c\u200d\u200b\u200d\u200c Challenges of a Multi-Tenant VoIP Platform The core idea is to develop a single telephony infrastructure capable of serving multiple tenants securely by keeping each of them completely separate from the others and yet sharing the underlying compute, storage, and networking resources. It is not as such just about providing a feature-rich telecom<\/p>\n","protected":false},"author":1,"featured_media":2237,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2231","post","type-post","status-publish","format-standard","has-post-thumbnail","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/posts\/2231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/comments?post=2231"}],"version-history":[{"count":7,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/posts\/2231\/revisions"}],"predecessor-version":[{"id":2253,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/posts\/2231\/revisions\/2253"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/media\/2237"}],"wp:attachment":[{"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/media?parent=2231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/categories?post=2231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.capanicus.com\/blog\/wp-json\/wp\/v2\/tags?post=2231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}