- 5 port and 10 port versions available
- Supports data circuits up to 64Kbps
- Supports CSU/DSU up to four miles away
- Supports switched 56Kbps circuits
- Allows provisioning of DDS services
- Allows consolidation of DSU traffic as DS0-A or DS0-B
IMACS OCU-DP Cards
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.
Each OCU-DP port can be independently programmed to operate at 2.4, 4.8, 9.6, 19.2, 56, SW-56 and 64 Kbps in either DS0-A, (one channel per DS0) or DS0-B format, which allows multiple data ports from multiple OCU-DP cards in the system to be mapped into the same DS0 time slot. If the DS0-B format is selected, the user then specifies the type of DS0-B format required (b-5, b-10 or b-20) and the subrate position that the data port occupied by the data port within the DS0-B frame.
In switched-56K mode, an OCU-DP port provides a connection for an external switched-56K DSU/CSU that will perform all call set-up and dialing functions. The OCU-DP card converts the call set-up commands into standard signaling and sends the signaling over the WAN facility.
All OCU-DP cards support a low speed secondary channel that is established in the 8th bit position of the DS0 time slot to which the OCU-DP port is assigned. The secondary channel can be used for testing and maintenance of the main circuit or for the transmission of other, independent, low speed data.Download or print data sheet