Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
68 www.polycom.com
❑The ISDN BRI service must allow videoconferencing calls to be
dialed on either B channel or on both simultaneously.
❑The D channel should not permit X.25 packet data.
❑The ISDN BRI service must be configured as Terminal Type A.
❑The ISDN BRI service must support automatic Terminal
Endpoint Identifiers (TEIs).
❑The ISDN BRI service must be tariffed and available from the
customer’s local central office.
DCP (Digital Communication Port) On Lucent Definity ECS

Network Configuration

The Lucent Definity G3 supports DCP connectivity on V2 and
later. ViewStation DCP-based systems support the Lucent Definity
DCP 2-wire configuration, and requires the DCP ports to be
programmed as PDM. No NT1 devices are required with
DCP-based systems.
Typically, 4-pair Cat-5 cabling is used between the Definity ECS and
the network interface module of the ViewStation, terminated on
RJ-45 jacks.
Installation
You can install ViewStation systems in the same room as the Quad
BRI network interface module, or you can connect to the Quad BRI
network interface module through the building’s wiring.
You can locate the system up to 250 feet away from the Quad BRI
network interface module, with the following provisions:
❑If the distance from the system to the Quad BRI network
interface module is less than 50 feet, no additional power is
required.