VoIP
Issabel PBX
Asterisk-based unified communications distribution with an integrated web console, favoured where a full appliance-style build is wanted on commodity hardware.
Capabilities
What we implement
- Extensions, IVR and queue configuration
- Trunk and route management
- Call recording and reporting
- Migration from legacy Elastix builds
Security
How it is hardened
- TLS/SRTP transport
- Fail2ban and source restriction
- Panel access limited to management network
Editions & pricing
Issabel PBX editions and vendor pricing
Vendor list prices for the editions we deploy. Deployment, migration, hardening and support are quoted separately by Techno Trader PK — they are never bundled into these figures.
| Edition | Licensed by | Vendor list price |
|---|---|---|
| Open-source coreIssabel is open source; paid support subscriptions are optional. | licence cost | $0 |
Prices are checked against the vendor's published price list. Last verified 9 Sept 2026. Vendor list prices exclude tax and can change without notice. Vendor pricing page
Architecture
Issabel PBX reference architecture
An Asterisk core with an integrated console: the panel is treated as management only, while trunks, media and recordings sit behind their own controls.
01 · Carrier edge
Primary SIP trunkBackup trunkPSTN gatewayRegistration or IP authentication per trunk with a defined failover order.
02 · Border
Edge firewallFail2banSIP ALG disabledOnly carrier and known extension ranges reach signalling ports; TLS and SRTP where endpoints support them.
03 · Issabel core
Asterisk engineWeb consoleIVR & queuesCDR databaseConsole access restricted to the management network; configuration exported for version control.
04 · Endpoints
Desk phonesSoftphonesRemote agentsProvisioning templates per model; remote users reach the PBX over VPN rather than open SIP.
FAQ
Issabel PBX questions we are asked
- Is Issabel a safe upgrade path from Elastix?
- Yes, it is the community continuation of that lineage. Migrations are rebuilt from a configuration inventory rather than copied verbatim, because old dial plans usually contain rules no longer in use.
- Issabel or FreePBX?
- Both are Asterisk front-ends. FreePBX has the larger module ecosystem and commercial add-ons; Issabel suits teams that want the all-in-one appliance model. The underlying engineering is the same.
- Can Issabel handle call-center traffic?
- For moderate queue-based volumes yes. For predictive outbound at scale a purpose-built dialler platform and separate trunk capacity planning are the correct answer.
Related
Other voip platforms
Issabel PBX is referenced to describe engineering capability. All trademarks and product names are the property of their respective owners; no partnership or endorsement is implied.
Ready to scope the work?
Share your environment and objectives. You will get an engineering response covering scope, approach and considerations.