ADTRAN HDSL 3192 HTU-C Installation And Maintenance Practice page 12

HDSL 3192 HTU-C Installation and Maintenance Practice
Per GR-1089-CORE Section 9, the 3192 HTU-C does not have an
internal DC connection between battery return and frame ground.
As such, it may be installed in a DC-I (isolated) or DC-C (common)
installation. For installations where other cards or the host system
have internal connections between battery return and frame
ground, the system would be intended for deployment only in a
DC-C installation.
The HDSL port is classified as Type 1, 3, and 5, as defined in
Appendix B of GR-1089-CORE Issue 4, and meets the lightning
and power fault criteria with any primary protector that meets any
of the voltage limits of GR-974-CORE or GR-1361-CORE (i.e.,
carbon blocks, gas tubes, solid states, etc.).
The DSX-1 port is classified as Type 2 or 4 as defined in Appendix
B of GR-1089-CORE Issue 4, and is suitable for connection to
intra-building or unexposed wiring or cabling only. Do not
metallically connect this port to interfaces which connect to the
Outside Plant (OSP) or to the OSP wiring. The DSX-1 port is
designed for use as an intra-building interface only (Type 2 or Type
4 ports as described in GR-1089-CORE Issue 4) and requires
isolation from exposed OSP cabling. The addition of Primary
Protectors is not sufficient protection in order to connect this
interface metallically to OSP wiring.
Current limiting protectors are not required.
The 3192 HTU-C is designed to operate with a nominal operating
voltage of –48 VDC and a minimum operating voltage of –40 VDC.
The 3192 HTU-C will not be damaged by any steady state voltage
below –56.7 VDC.
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