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3CX Phone System 10 Service Pack 5
December 7, 2011 – 6:58 pm | 16 Comments

3CX is pleased to announce a new release of 3CX Phone System 10, build 22686. Service Pack 5 fixes numerous 3CX Wallboard issues and also adds a new and important caller ID feature. To download …

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Is Microsoft ISA server 2004 / 2006 supported as a firewall for VOIP?

Submitted by on August 3, 2009 – 7:00 pmNo Comment

The issues with Microsoft ISA server 2004 and 2006

Unlike most professional firewalls, Microsoft ISA server is not able to do static port mapping. Without static port mapping it is not possible to reliably connect to a VOIP provider or remote extensions. This is not a 3CX issue but an ISA server issue. The best solution is to buy a firewall such as from Linksys, Cisco, Netgear and others. Even a $100 Linksys router can do static port mapping. Configuration guides can be found here:

Microsoft ISA server is known to cause issues practically all VoIP telephony systems.

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