ADTRAN 2FXS/DPO PM Connections, Accessing Tests Through EASYMENU, Testing, Digital Loopback Test

3. CONNECTIONS

The 2FXS/DPO PM occupies one card position in the D4 channel bank. The connector pin assignments are detailed in Figure 3.

When the option BOTH is selected, tone is placed on both the loop and the network.

Accessing Tests Through EASYMENU

Once the unit is in normal operation, these test features are accessed by selecting:

4. TESTING

The 2FXS/DPO performs a self test after power on. During this time all four indicators turn On in a predefined sequence while the 2FXS/DPO verifies proper operation of critical circuits in the design. After successful completion of the self test, all indicators function in their normal mode.

Digital Loopback Test

The Digital Loopback Test is used to test loopback data coming from the network. Received data, or RNPCM, is latched in during the appropriate receive time slot. This data is then placed on the TDATA bus during the unit's transmit time slot.

	28	1	FRM GND
	29	2	-12V
+5V	30	3	12V GND
	31	4	+12V
	32	5	5V GND
	33	6	TWD
	34	7	TSP
TDATA	35	8	TSQ
	36	9	RNPCM
RFB	37	10	RFA
RCLK	38	11	TDCLK
RWD	39	12
RSQ	40	13	RSP
	41	14	RNDIS
	42	15	-48 FRT
-48F	43	16
	44	17	-48 SPRT
	45	18
	46	19
	47	20
	48	21	TFCC
IN	49	22
-48SD	50	23	2N
R	51	24	T
	52	25
BT	53	26	RT
20HZ	54	27	RG

Figure 3. Connector

Pin Assignments

Channel Unit Menus	(3)
Desired slot	(1-24)
Test	(4)

These tests are service affecting.

Faceplate Indicators

The 2FXS/DPO faceplate indicators and descriptions are explained in Table F.

Table E. 2FXS/DPO Faceplate Indicators

			Indicator	Indication	Description
2FXS/DPO
	1109403L2		REM	Off	Unit is manually provisioned.
		PM		Green	Unit is remotely provisioned.
		AP		Flashing	Configuration/provisioning error.
	REM		PM	Off	PM mode is not operating.
		PM
				Green	PM mode is operating.
TEST
BUSY			TEST	Off	All tests are inactive.
				Yellow	Test is active.
			BUSY	Off	Network and Loop On-hook.
				Green	Network, Loop, or both are Off-
					hook.
			Switch	Selection	Description
					Alternate provisioning switch.
			AP	Depressed	Changes provisioning source
					from manual to remote or remote
					to manual.

Network On-hook/Off-hook Test

The Network On-hook/Off-hook test is used to test signaling sent to the network by the unit. When On-hook Test is selected, On-hook signaling is sent to the network. When Off-hook Test is selected, Off-hook signaling is sent to the Network. The customer loop is forced On- hook while this test is active.

Customer Ringing Test

The Customer Ringing Test will activate the unit's ring relay in a 2-on/4-off ring cadence, providing ringing to the customer loop when a ring generator is properly connected to the channel bank.

1004 Hz DRS Tone Generation Test

The 1004 Hz DRS (Digital Reference Signal) Tone Generation test is used to send the DRS signal to the network, loop, or both. When Network is selected, the DRS is sent to the network from the unit. The far end unit should measure a 1004 Hz tone at a level determined by the circuit gain of the far end unit. When Loop is selected, the DRS is placed on the receive path. The loop receive level is determined by the following equation:

Receive Level = 0dB - Attenuation

The 2FXS/DPO PM has four faceplate indicators and a depressed provisioning switch. The front panel PM (Performance Monitoring) indicator Flashes during control link establishment and remains ON after the channel unit has been remotely provisioned.

If the channel unit has been remotely provisioned, the operator can alternate between the remote configuration data stored in nonvolatile memory or manual switch settings by pressing the momentary AP (Alternate Provisioning) switch located on the front panel.

The REM indicator remains ON when the channel unit is operating based on Remote Provisioning, and is OFF when based on manual switches. If the channel unit has never been remotely provisioned, the AP switch has no effect and the REM indicator remains OFF . The REM LED Flashes when an invalid operation mode is selected.

4 Section 61109403L2-5, Issue 3 61109.403L2-5C