Polycom 128 Calling Speed and Audiovisual Quality, Basic Setup for the ViewStation 512 and MP

ViewStation 512/MP

During a call, the ViewStation 512 and MP displays two circular call progress indicators per available ISDN line. Each indicator represents one channel of an ISDN line. In the illustration below, the call is attempting to use all eight channels from four available ISDN lines.

Calling Speed and Audiovisual Quality

The ViewStation 512 and MP allow you to increase operating line speeds to improve sound and video quality. Available speeds are limited by the number of ISDN lines you have and the speeds supported by the device being called. The ViewStation 512 and MP automatically select the optimal audio protocol for a chosen speed.

Basic Setup for the ViewStation 512 and MP

Follow the instructions in the ViewStation 512/MP QuickStart booklet or the Getting Started section of this manual to install your unit. The ViewStation 512 and MP vary from the ViewStation 128 with the following additional equipment:

•IMUX Module. The ViewStation 512 and MP use the included external IMUX module to connect up to four ISDN lines to the videoconferencing unit. The IMUX module allows multi-line ISDN connection to locate and connect to additional ISDN lines available to a far-site device. Each ISDN line adds 128 Kbps to the possible operating line speed; for example, a unit connected to the maximum four ISDN lines could operate at 512 Kbps.

•ISDN Lines. The ViewStation 512 and MP can use up to four ISDN lines. To connect these lines, plug each line to use into the IMUX module. Note that the ViewStation 512 and MP only require a single functioning ISDN line to operate, but speeds greater than 128 Kbps require the use of additional ISDN lines.

100 ViewStation User’s Guide