IMACS OCU-DP Cards

Overview

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

Specifications

Key Features
  • 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
Dimensions
  • 8″ x 7.5″, 20cm x 18.75cm
Power
  • 5-port: 10 Watts, 30.65 BTU/hr
  • 10-port: 19.8 Watts, 62.17 BTU/hr
Interfaces
  • 5-port: 5 RJ-48 connectors
  • 10-port: 10 RJ-48 connectors
Standards
  • AT&T 62411, Bellcore TA-TSY-000077, TA-TSA-000083, Pub 62310, ANSI T1.107-1988
Environmental
  • Operating temperature 0 to 50C, 32 to 122 F
  • Storage temperature -20 to 80 C, -4 to 176 F
  • Humidity 0 to 95% humidity, non-condensing
Geek Specs
  • Data format Synchronous-binary, serial
  • Data encoding Bipolar, return to 0, AMI
  • Line interface 4-Wire
  • Speeds 2.4, 4.8, 9.6, 19.2, 56 SW-56 and 64 Kbps
  • Sub-rate framing format DS0-A, DS0-B with 5, 10 or 20 divisions per DS0
  • Error correction Majority vote for speeds 9.6 Kbps or all less
  • Secondary channel As described in AT&T 62310, 62411 Addendum (pass through only) and TA TSY 000077 and TA TSY 000083, a separate lower speed data circuit which may be used for testing and maintenance. Modes are on or off.
    Secondary speeds supported are:
    Primary port rate / Secondary port rate
    56 Kbps / 2,666 bps
    19.2 Kbps / 1,066 bps
    9.6 Kbps / 533 bps
    4.8 Kbps / 266 bps
    2.4 Kbps / 133 bps
  • Operation modes OCU or CSU (software selectable per line)
  • Loopbacks Off, DTE, Net-a, Net-d (software selectable) (Net-a loops 4 wire interface to the network, Net-d loops the network at card interface to system bus).
  • Loopback generation (latching) Various loopbacks sent in-band to remote equipment: Off, DS0-n (loops the analog interface of the remote for 56K or less rate), CSU-N (loops the 4-wire interface of the remote), CSU-N (l00ps the 4-wire interface of local device).
  • Loopback detection Off, On, On with 10 minute time-out (latching and non-latching)

Ordering Information

Model
Description
PRM-824160
IMACS, OCU-DP, 5P
PRM-824660
IMACS, OCU-DP, 10P
8000-OCUDP-5P
IMACS 8000, OCU-DP, 5P
8000-OCUDP-10P
IMACS 8000, OCU-DP, 10P