The following table shows hardware and software requirements for Office Communications Server 2007 R2 Attendant.

Table 1. Hardware and Software Requirements for Office Communications Server 2007 R2 Attendant

System component Minimum requirement

Display resolution

Required: Super VGA 1024 x 768

Recommended: Super VGA 1280 x 1024 or higher

Operating system

Windows Vista 32-bit operating system, Service Pack 1 (SP1) (recommended)

Windows XP Professional with SP2 (SP3 recommended)


Data and voice: 1 GHz or higher processor; support for 32-bit and 64-bit

For the Microsoft Office RoundTable conferencing device: 1.8 GHz or higher


On Windows XP: 1 gigabyte (GB) of RAM

On Windows Vista: 2 gigabytes (GB) of RAM

Installation space

At least 100 MB free

Video memory

Microsoft DirectX 9-capable display adapter, ATI Radeon X300 or NVIDIA GeForce 5600 class equivalent or better with 256 MB of video memory


Microphone and speakers, headset with microphone, or equivalent device

Recommended: Microsoft unified communications (UC) device

Bandwidth requirements

Data: 56 kbps (minimum); 56 kbps (high-quality)

Voice: 50 kbps (minimum); 80 kbps (high-quality)

Video: 50 kbps (minimum); 350 kbps (high-quality)

The RoundTable device: 50 kbps (minimum); 350 kbps (high-quality)

The required and recommended bandwidth speeds are cumulative. For example, if you want to use voice, Webcam, and the RoundTable device, the minimum bandwidth would be 50+50+50=150 kbps.


Administrator privileges, or, in Windows Vista Standard User Mode, administrator credentials

Other requirements