Connecting And Configuring Your Network; Attaching Digital Network Cables; Internal Four-Wire Channel Service Unit (Csu) - PictureTel Concorde 4500 Administrator's Manual

CONNECTING AND CONFIGURING YOUR NETWORK

Attaching Digital
Network Cables

Internal Four-Wire Channel Service Unit (CSU)

F Y I
2-2
ISDN (Integrated Services Digital Network) Ñ A set of
transmission standards designed to ensure compatibility
between digital communications services worldwide.
T1 Ñ An AT&T term for a digital carrier used in the U.S. and
Japan to transmit a DS1 formatted digital signal at 1.544
megabits per second or 1.536 megabits per second using Clear
Channel Capability. A T1 line can carry up to 24 total channels
at 64 kbps.
E1 Ñ A European digital transmission facility used to transmit
a digital signal at 2.048 Mbps. An E1 line can carry up to 32
channels at 64 kbps.
This section describes the network interfaces and provides
procedures and illustrations for connecting to each network. Refer
to the procedure for the network you are using with the
Concorde¥4500. You may also refer to the Concorde¥4500 Servicing
Guide for information on pin assignments.
The Concorde¥4500 supports an internal CSU daughter board for
connecting to a CSDC 56-kilobit network or to a four-wire DDS line.
The internal CSU interface also provides an RS-449 connector to
support the concurrent connection of the system to both a switched
and a dedicated network.
The wires in the four-wire switched interface are used as follows:
two wires transmit data, and two wires receive data.
The Concorde¥4500 does not use the four remaining
F.Y.I.
conductors.
You must follow these guidelines when providing the cable:
Bring the four unused conductors out to the connector.
Use an RJ-48S jack at the termination point of the extended
demarc.