ADTRAN T200 IDSL warranty Options, Switch Description

2-wire Integrated Services Digital Network (ISDN) U-interface to the traditional 4-wire DDS signal for presentation to the customer.

The IDSL OCU-R is a digital network interface device located at the customer premises point-of- demarcation. In addition to terminating the ISDN U-interface, the IDSL OCU-R functions as a regenerative loopback device supporting Telco- generated testing. The IDSL OCU-R unit is available in T200 mechanics and can be optioned for 0 or -10 dB output toward the customer. Figure 2 illustrates the IDSL OCU-R Circuit Diagram. The IDSL OCU-R is powered from -120 Vdc constant voltage supplied by a U-BR1TE with PWR, or -48 Vdc provided by a locally powered T200 compatible mounting.

	Channel Bank		Customer Premises
			4-Wire Customer
	U	2-Wire Loop	Interface
T-Carrier	B
	R		IDSL OCU-R	DSU/CSU
	1	T/R Pair
	T
	E

Figure 2. IDSL/DDS Circuit Diagram

Features

•2-wire DDS deployment provided over a U-interface.

•Dual powering capability; Locally powered by -48 Vdc provided by mounting assembly or by -120 Vdc from a U-BR1TE with PWR.

•DB-9 craft interface access for provisioning, testing, and performance monitoring.

•Frame IQ/ADS-6 provide physical layer and Frame Relay PM and inband PM access respectively.

•Protected loopback prevents false latching loobpack at 64 kbps.

•Switch selectable data rate including subrates, 19.2 and 56 kbps rates, including secondary channel, and 64 kbps clear channel capability.

•LED indicators for operational status.

•T200 mechanics.

•Transmits Abnormal Station Code upstream during out-of-service 4-wire customer loop condition.

2. OPTIONS

Options and rate are selected with the front panel DIP

switches	as shown in Figure 1 and listed in Table 1.
		Table 1. Options
Switch		Description
SC		ON selects the Secondary Channel if 56,
		19.2, 9.6, 4.8, or 2.4 are selected
64		ON selects 64k clear channel data
56		ON selects 56k data and, if SC = ON,
		selects 56k secondary channel data
19.2		ON selects 19.2k data and, if SC = ON,
		selects 19.2k secondary channel data
9.6		ON selects 9.6k data rate and, if SC = ON,
		selects 9.6k secondary channel data
4.8		ON selects 4.8k data rate and, if SC = ON,
		selects 4.8k secondary channel data
2.4		ON selects 2.4k data rate and, if SC = ON,
		selects 2.4k secondary channel data
SW56		ON selects Switched 56 operation
-10 dB		ON reduces DDS transmit signal by
		approximately 10 dB
QM		ON enables quality monitoring
EC		ON selects error correction mode. Only
		valid for rates of 19.2k or lower
		ON allows unit to respond to latching
		loopbacks; unit always responds to non-
LLEN		latching loopbacks
		OFF while in 64k data mode will enable
		PLB feature; latching loopbacks are always
		enabled in this mode

Customer Interface Transmit Line Build Out When -10 dB (SW1-1) is ON, the IDSL OCU-R transmits a -10 dB AMI signal across the 4-wire customer interface toward the CSU/DSU. When OFF is selected the unit transmits a 0 dB AMI signal toward the CSU/DSU.

2 61220010L2-5, Issue 3 61220010L2-5C