Table A. SW1 Option Settings, Connections, Testing

OFF OFF

OFF

SW1

O 1 2 3

SW1

O 1 2 3 4 5 6 7 8 9 10

ERROR CORRECTION

BANK

SLC-96 MODE I, III

OFF

SLC-96 MODE II

TYPE

OFF OFF OFF OFF OFF

5 6 7 8 9 10

ZERO CODE SUPPRESSION LATCHING LBK ENABLE ENHANCED SWITCHED 56 (OBSOLETE) AB SIGNALING

QUALITY MONITOR ETR

		Figure 3. SW1
		Table A. SW1 Option Settings
	Switch	Function
	SW1-1	On .... Activates error correction
		Off .... Deactivates error correction

	SW1-2	On .... Selects D4 bank type.
		Off .... Unable to select D4 bank type.

	SW1-3	On .... Selects SLC-96 bank, Mode I or III.
		Off .... Unable to select SLC-96 bank, Mode I or III.
	SW1-4	On .... Selects SLC-96 bank, Mode II.
		Off .... Unable to select SLC-96 bank, mode II.

	SW1-5	On .... Activates zero code suppression.
		Off .... Disables zero code suppression.
	SW1-6	On .... Enables latching loopback.
		Off .... Disables latching loopback.

	SW1-7	Leave switch in the off position to select SW56. Enhanced SW56 function has been obsoleted.
		Off .... Selects SW56 mode.

	SW1-8	On .... Enables use of hardware A/B signaling bits in SW56 mode.
		Off .... Disable hardware A/B signaling.

	SW1-9	On .... Enables loop signal quality monitoring. Loop disconnects upon detection of poor signal quality.
		Off .... Disables loop signal quality monitoring.

	SW1-10	On .... Enables extended transmit range. Transmit level is increased for 56 or 64 kbps loops with a loss in excess of
		34 dB. Loss of sealing current (open line) overrides ETR. Unit is shipped with this switch in the off position.

Off .... Disables extended transmit range.

3.CONNECTIONS

The OCU DP occupies one card position in the D4 channel bank. The connector pin assignments are detailed in Figure 4.

4.TESTING

In the case of equipment malfunction, use the automated testing capability of the Serving Test Center (STC) or the faceplate test connectors with portable KS- 20908/20909 or a functionally equivalent test set.

The faceplate contains Bantam jacks for manual testing (see ADTRAN D4-OCU DP Description practice, Section 61107005L2-2, Testing, for manual testing information).

Loopback Tests

OCU, channel, and optional DSU loopbacks, both normal and latching, may be activated by issuing the prescribed commands in accordance with TA-TSY-000077. The LOOPBACK LED is illuminated when OCU loopback or channel loopback is activated.

61107.005L2-5C

Section 61107005L2-5, Issue 3

D4-OCU specifications

ADTRAN D4-OCU is a versatile and reliable digital access concentrator designed to efficiently manage and deliver telecommunication services. This device is primarily aimed at service providers looking to extend their network capabilities and enhance customer service by integrating robust functionalities into their infrastructure.

One of the main features of the ADTRAN D4-OCU is its support for a wide range of digital signal formats, including DS1, DS3, and various T1/E1 standards. This flexibility allows service providers to accommodate different types of connections in a cohesive manner, making it easier to manage existing infrastructure while preparing for future upgrades. The device is engineered to provide a seamless transition between legacy TDM and modern packet-based networks, thereby facilitating a smooth migration path for operators.

The D4-OCU is built upon advanced technologies to optimize performance. It utilizes efficient signaling protocols that support both circuit-switched and packet-switched services. This dual capability ensures that service providers can meet the diverse needs of their customer base, whether they are providing traditional voice services or modern high-speed internet access. By supporting both voice and data traffic, the D4-OCU helps to maximize resource utilization, reducing operational costs and improving revenue potential.

Additionally, the ADTRAN D4-OCU features robust monitoring and management capabilities. With built-in diagnostic tools, service providers can easily track performance metrics, troubleshoot issues, and maintain service quality. This proactive approach to network management allows for quick resolutions to potential problems, ultimately enhancing customer satisfaction and reducing service disruptions.

Another key characteristic of the D4-OCU is its scalability. As demand for bandwidth increases, service providers can easily expand the capacity of the device by adding additional modules. This modular architecture ensures that as technology evolves and customer needs change, the D4-OCU can adapt accordingly without requiring a complete system overhaul.

In conclusion, the ADTRAN D4-OCU stands out as a powerful digital access concentrator that combines versatility, performance, and scalability. Its ability to support a wide range of digital signal formats, efficient integration of diverse technologies, and robust management features make it a valuable asset for telecommunications service providers. With the D4-OCU, operators can confidently navigate the complexities of modern networking while delivering high-quality services to their customers.

SW1

Figure 3. SW1