User manual

Chapter 2: Other Data Interfaces
61202.076L1-1 TSU 600e User Manual 25
• DSX1 provides connection to a digital PBX.
• Full Drop and Insert permits the dropping of data and insertion
of new data into the same DS0 time slot. This SI module includes
a long haul DS1 interface. It can also be used as a second DS1 in-
terface to provide an up to 3 MB aggregate throughput.
Other Data Interfaces
Additional data interfaces can be installed in the option slots, and
include the following:
• Nx56/64 serial interface. This module is the same as the base Nx
interface but offers single or dual V.35 ports.
• Analog voice modules (FXS/FX0/E&M) for connection to an an-
alog PBX or key system.
• OCU DP and DSU III modeuls for interfaces to DDS or 4-wire
Switched 56.
• Dial backup for ISDN backup of data networks.
• V.34 Modem Module.
GROUNDING INSTRUCTIONS (UL 1459)
Grounding instruction information from the Underwriters' Laborato-
ry UL 1459 Standard for Safety: Telephone Equipment , of September 20,
1993, is provided in this section.
An equipment grounding conductor that is not smaller in size than
the ungrounded branch-circuit supply conductors is to be installed
as part of the circuit that supplies the product or system. Bare, cov-
ered, or insulated grounding conductors are acceptable. Individu-
ally covered or insulated equipment grounding conductors shall
have a continuous outer finish that is either green, or green with one
or more yellow stripes. The equipment grounding conductor is to
be connected to ground at the service equipment.
The attachment-plug receptacles in the vicinity of the product or
system are all to be of a grounding type, and the equipment ground-
ing conductors serving these receptacles are to be connected to earth
ground at the service equipment.
A supplementary equipment grounding conductor shall be in-
stalled between the product or system and ground that is in addi-