PictureTel Concorde 4500, Administrator'S Manual, Page: 41 / 250

2-1
2
Connecting and
ConÞguring Your
Network
This chapter explains how to connect to and conÞgure the network
interfaces you can use with the Concorde¥4500.
You can connect your system to one of the following digital network
interfaces:
❑
Internal four-wire CSU
❑
V.35
❑
RS-449
❑
X.21
❑
Northern Telecom V.25 bis
Before reading this chapter, here are some terms you may want to
know:
❑
CSDC (Circuit Switched Data Capability) Ñ A circuit-switched,
56 kbps, full duplex data service that allows data
communication over regular telephone lines.
❑
DDS (Dataphone Digital Service) Ñ A private line digital service
used for data transmission up to 56 kbps.
❑
Switched-56 Ñ A switched network service that operates with
56 kbps channels. A typical call on this network uses two
channels, and thus transmits data at a rate of 112 kbps.
F Y I
F.Y.I.
If a POTS daughter board is present, you can also connect a
two-wire telephone line to your system.