ADTRAN DSU IV ESP, User Manual

Page: 43 / 194

Chapter 3. Operation
61204011L1-1 DSU IV ESP User Manual 3-9
DBU and Ethernet Card Slots
The DSU IV ESP rear panel has two card slots for the installation of
dial backup and ethernet cards. To insert cards, perform the
following procedure:
1. Remove power from the DSU IV ESP.
2. Slide the card into the corresponding rear slot until the card
panel is flush with the DSU IV ESP chassis.
3. Push card locks in (until they click) to secure the card and
ensure proper installation.
Telco Connector: Network Interface Connection
The DSU IV ESP has an 8-position modular jack labeled T
ELCO
. The
telco connector is used for connecting to the DDS network. The
pinout for this connector is listed in Pinouts on page A-1.
Each ESP DBU card has a connector which is used for connection to
the switched backup network. The pinout for the connector
depends on the card type. Pinouts for 4-wire Switched 56,V.34, and
ISDN 1B+D DBU options are shown in Appendix A, Pinouts on
page A-1.
Remove power from the unit before installing or removing ESP option
cards.
Card slots are keyed to prevent improper installation (i.e., putting a DBU
card into the ethernet slot).