Specifications

Reference Guide
2-13
Applications Data Modules and Applications
Figure 2-6. IAD FRAD Card Application
2.4.5 OCU-DP Card
The OCU-DP (Office Channel Unit - Data Port) is used to interface directly to Data Service
Units (DSUs)/Channels Service Units (CSUs) supporting data traffic up to and including
64Kbps. A four-wire circuit can connect the OCU-DP card to a DSU/CSU that can be located
up to four miles away. In switched 56 Kbps mode, users can access the network on an
as-needed basis by dial-up commands. The system unit must be equipped to provide -48 VDC
power to fully support the functionality of the OCU-DP card.
2.4.5.1 OCU-DP Card Models
The Integrated Access System supports three cards for support of external CSU/DSUs that are
stated below:
•
8249 OCU-DP 2 Port Card
•
8246 OCU-DP 10 Port Card
•
8247 OCU-DP 5 Port Card
The 8249 OCU-DP card supports two ports. The 8247 is a five port OCU-DP card that can
accept a five port mezzanine card (model 845) for expansion to a total of ten OCU-DP ports.
All OCU-DP cards support RJ48 female connectors.
Router
IAD w/ FRAD
DACS
PSTN
Frame
Relay
PBX