Bulletproof, easy-to-maintain IP PBX with built-in unified messaging.
# Phones: 10-40
Compares to:
NEC, Avaya, Toshiba

The small business phone system for the Microsoft-centric buyer.
# Phones: <20

Compares to:
Open Source

Hybrid PBX with strong call handling and robust call center.
# Phones: 10-100

Compares to:
Avaya, Mitel, NEC

The easy-to-scale, hosted phone solution.
# Phones: 20-100

Compares to:
Packet 8, Aptela

Hosted Unified Communications
for the medium-sized business.
# Phones: 20-200

Compares to:
Panterra

Fully managed communications
for Enterprise.
# Phones: 100+

Compares to:
No Direct Competitor

Unified communications on a
single server platform optimized for Microsoft environment.
# Phones: 25-1,000

Compares to:
Cisco, Shoretel

Highly scalable, resilient PBX with SIP-based multi-media capabilites.
# Phones: 25-1,000

Compares to:
Cisco, Shoretel, Mitel

Feature rich, web-aware and VERY affordable.
# Phones: 10-250

Unified communications, collaboration and presence platform.
# Phones: Unlimited
Compares to:
Cisco, Siemens, IBM

Advanced intelligent call center PBX with voice, fax, chat and
email queuing.
# Phones: 25-1000
Compares to:
Aspect, Genesys, Syntellect

Desktop, workgroup and conference room solutions.

Compares to:
Polycom, Tandberg