Whats New v36

Issabel MT — Changelog v36

Issabel MT Changelog v36

Release date: March 16, 2026

New Features

New Two-Factor Authentication (2FA)

Two-step email verification for web panel access.

Temporary email code with configurable expiration
Trusted devices (remember device)
Configurable per role: enforced, enabled or optional (super/admin/user)
Individual activation/deactivation from user profile
Trusted device management with last access date
Associated security event logging

New Call Notes (Call Notes)

Allows adding subject and notes to calls, visible in the CDR.

Configurable popup during the call (on answer, on hangup or both)
Company and user-level configuration (timing, delay, timeout)
Editing notes from CDR history and from API

New Bitrix24 CRM Integration

New full integration with Bitrix24.

Search contacts by phone number
Automatic logging of incoming and outgoing calls
Popup/OpenURL when receiving calls
Upload of recordings
Auto-creation of contacts
Connection test from panel

New Clientify V2 (new.clientify.com)

New integration with the renewed Clientify platform (new.clientify.com), which uses an independent API. The previous module is kept as "Clientify Legacy" for customers on app.clientify.com.

API v2 (api-plus.clientify.com)
Same capabilities as other CRMs: incoming, outgoing, recordings, auto-creation of contacts
Connection test from panel

New Persone WhatsApp Business Calling

Support for receiving WhatsApp Business calls through Persone.chat.

New Personal Contacts

In addition to company contacts, each user can now manage their own personal contacts.

Creation, editing and deletion of personal contacts
Bulk import from CSV
Administrators can manage contacts of their company

New Custom Service Codes (VSC)

Vertical service codes are now fully customizable per company.

Customizable at super and company level
VSC map available in user panel

New Public URLs for Recordings

Allows generating temporary public links to share recordings without authentication.

URL generation from recordings view
Temporary access tokens

New External Storage for Recordings

Automatic backup of recordings to external storage services.

Supported backends: Amazon S3 (and compatibles), Backblaze B2, SFTP, FTP
Automatic processing in queue
Connection test from panel
Direct access URLs to recordings from the CDR (in compatible backends)

Improvements

Improvement Mail2Fax: Individual Senders

Support for multiple sender addresses per company
Individual validation of authorized addresses

Improvement CRM Integrations

Full parity between all supported CRMs. All integrations now share the same base capabilities:

Capability	Bitrix24	Clientify V2	Clientify Legacy	Dolibarr	Holded	HubSpot	Odoo	Pipedrive	Zoho
Incoming calls	✅	✅	✅	✅	✅	✅	✅	✅	✅
Outgoing calls	✅	✅	✅	✅	✅	✅	✅	✅	✅
Post-call logging	✅	✅	✅	✅	—	✅	✅	✅	✅
Recording upload	✅	✅	✅	✅	—	✅	✅	✅	—
Auto-creation of contacts	✅	✅	✅	✅	✅	✅	✅	✅	✅
Connection test	✅	✅	✅	✅	✅	✅	✅	✅	✅

Common improvements:

Configurable recording mode (all, none, on_demand)
Granular auto-creation of contacts (incoming, outgoing, both, disabled)
Enable/disable call logging in CRM
Timeouts in external API calls to avoid blocking

HubSpot

Complete rewrite of the connector (no dependency on official SDK)

Odoo

Rewrite of XML-RPC integration
Post-hangup call logging fully implemented

Zoho

Migration to php-sdk-8.0 (PHP 8.4 compatibility)
Fix for OAuth re-authentication on each save

Pipedrive

Update to new search API

Improvement Contacts (formerly Alias)

Renamed from "Alias" to "Contacts" across the interface
Name limit increased from 16 to 64 characters

Improvement Events Module

Support for POST method with customizable body
Custom HTTP headers per event rule

Improvement Number Rewriting in SIP Trunks

Manipulation of destination numbers in SIP trunks.

Strip leading digits from destination number
Prepend prefix to destination number

Improvement Missed Calls

New COMPANY type for unanswered incoming PSTN calls
Automatic resolution when the agent calls the client and it is answered
Automatic resolution when the client calls back and is attended
Email notification includes caller name and number in subject

Improvement Webphone

Integrated contact directory with search (company + personal)
CallerID updates on screen during transfers

Improvement CDR API

Download recording and transcription by UUID as well as by ID
Delete transcription and recording by UUID
Updated Swagger documentation

Improvement Transcriptions

Automatic summary generation
Internal performance and compatibility improvements

Improvement Recordings: Company Timezone

Recording filenames use company timezone instead of system time

Improvement SMTP Configuration

Automatic migration from ssmtp to msmtp
SMTP connection test from web panel
Support for authentication with configurable encryption

Improvement pekepbx.conf Unification

Consolidation and reorganization of the main configuration file
Automatic migration of existing configurations

Improvement SBC CDR: Minute-Based Calculation

New CALCULATE_CDR_ON_MINUTES option for time-based billing

Improvement Security Events

Dedicated IP field with filtering in event log
Automatic rotation of event logs to monthly CSV

Improvement Dialplan Hooks

Refactoring of AGI hooks to native gosub dialplan contexts

Improvement System and Monitoring

New healthcheck: CEL→Redis flow
sipdoc_pekecheck: SMTP status, filesystems, maintenance mode
Improved MOTD: uptime, local IP
Log rotation: 31-day retention
MariaDB: dynamic innodb_buffer_pool_size based on RAM
PHP-FPM: max upload 20MB
Network buffer optimization for VoIP
nginx protection against scanners (fail2ban)
rsyslog: modular configuration with compact format

Improvement Kamailio: SQL Injection Protection in User-Agent

Mitigation of SQL injection via SIP User-Agent header.

Improvement Stability and Performance

More stable AMI connection with better recovery
Redis: improved reconnection strategy, default RDB backup, orphan key cleanup
Queues: performance improvement in high-load systems
CDR table rotation rewritten with backup verification before deletion

Bug Fixes

Bugfix Recordings on Transfers

Recording no longer stops when the originator transfers the call (blind or attended)

Bugfix CallerID in Blind Transfer

The destination extension showed "start" as CallerID instead of the real number

Bugfix CDR Duration in Transfer from Origin

Correct duration calculation when the call originator performs the transfer

Bugfix Trunk Calls: CDR and Modules

Calls answered via trunk are correctly marked as answered
CRM and missedcall modules work correctly on trunk calls

Bugfix Extension Number Change

Queue extensions reload correctly when changing number

Bugfix Range Search in Trunks

The range search logic was inverted

Bugfix Other Fixes

CSV download fix in Advanced Routing
MWI (Message Waiting Indicator) fixed in Kamailio

FAQs

Does Issabel MT Have a Price?

Yes, Issabel MT is a solution distributed as Software as a Service (SaaS) and is priced based on the number of users you need to deploy, with unlimited tenant creation.

Is Issabel Multitenant Free (libre)?

No it’s not. Not entirely as it does not fill the 4 freedoms:

You CAN use Issabel Multitenant without limitations and for any use.
You CAN modify Issabel Multitenant and get access to the source code.
You CANNOT redistribute Issabel Multitenant copies.
You CANNOT redistribute your modified version of Issabel Multitenant.

Is Issabel Multitenant reliable?

It is. Issabel Multitenant has been deployed in production in multiple service providers since Q1 2016.

When are new releases expected?

You can expect 4 releases per year.

Do new versions have a cost?

Issabel Multitenant licensers will always have access to new versions if they have acquired the maintainance support plan.

Is support paid for?

Issabel Multitenant licensers will always have access to new versions if they have acquired the maintainance support plan.

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