Kolmisoft Blog

Origin-based rating: two prices, one prefix

Suppliers list prefix 356 twice on a Malta deck. You pay one price when the caller is inside the European Economic Area. You pay...

Mindaugas Kezys
Sep 29, 2026 4 min read

Your minutes and theirs will not match

Same call, different billed seconds. A billing increment mismatch (60/60 vs 1/1) is the usual cause. Compare one CDR before the monthly dispute.

Mindaugas Kezys
Sep 28, 2026 4 min read

Calls per second vs concurrent calls

Calls per second and concurrent calls are separate trunk limits. A dialer can hit the setup rate while the channel count is still low.

Mindaugas Kezys
Sep 26, 2026 5 min read

2026 September Development Update

MOR adds a one-call anonymous dial prefix, voicemail greeting upload, and CDR exports you can download from the server. The API can edit a...

Mindaugas Kezys
Sep 26, 2026 4 min read

Your Firewall Passed. Your Balance Didn’t.

Stolen SIP credentials look like a real customer. Credit limits, live prepaid cut-off, and spend alerts stop fraud that Fail2Ban never sees.

Mindaugas Kezys
Sep 11, 2026 4 min read

Introducing DID billing for MOR Resellers

You set the wholesale Reseller Rate. Your Reseller sets the retail Owner Rate. MOR bills both on the same answered inbound call, so inbound...

Mindaugas Kezys
Sep 2, 2026 6 min read

2026 August Development Update

The main MOR change is DID billing for Resellers. You can sell inbound DID through Resellers and keep a wholesale margin: you set what...

Mindaugas Kezys
Sep 2, 2026 4 min read

2026 July Development Update

MOR: Finances report for resellers and partners, Difference column and sorting on Finances, Reseller PhoneBook, missed-call email, Diversion header storage and localization, Integrity Check...

Mindaugas Kezys
Aug 10, 2026 1 min read

2026 June Development Update

MOR: 2FA improvements, DID and reseller workflows, call-end webhooks, device and PJSIP settings, announcements, call forward, API fixes, Google Maps, alert logic. M4: 2FA...

Mindaugas Kezys
Jul 10, 2026 4 min read

How VoIP providers get drained in 30 minutes You open Last Calls on a Monday and a prepaid balance is gone. Or a postpaid account with unlimited credit spent half an hour on satellite, cruise-ship, and premium-rate prefixes. The upstream carrier invoice... Read More

Introducing CDR export files on the server A template export can stay on the server. You download it from CDR export files, and the email carries a link. The archive is attached only when you ask for that and the file... Read More

Why a dialer gets 503s when channels are still free You start a predictive campaign. The trunk still shows free channels. A second later the dialer log fills with SIP 503 and congestion, and the leads burn. The channel counter never got close to... Read More

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