NEC nd-20292 manual Esi-Ea/Eb Etu, Sli-Ea/Eib Etu, Mfr-Ea Etu, Mon

ND-20292

CHAPTER 2 APRIL, 1990

Transmit

1 mON

2 aON

3 =ON

4 DON

5 mON

All switches OFF =		Odb
Switch	1 ON =	-2db
Switch	2 ON =	-4db
Switch	3 ON =	-8db
Switch4ON=		-12db
All 4 Switches ON=		-16db
Switch	5 ON =	-2db

/6 mON

Receive

7 =ON

8 mON

Switch	6	ON=	-4db
Switch	7	ON=	-8db
Switch	8	ON =	-12db
All 4 switches ON=			-16db

Figure 200-22 SW102, or SW202 pad switch settings on TLI-EB ETU

SW102 (switches 5 - 8) sets the reception loss level for Channel 1.

SW202 (switches 1 - 4) sets the transmission loss level for Channel 2.

SW202 (switches 5 - 8) sets the reception loss level for Channel 2.

NOTE: Transmission and reception loss levels are also programmable for each E&M Tie Line; it is recommended to set switches 1-8,0nboth SW102 and SW202, to the OFF position.

LEDs 1 and 2 (Red) indicate the status of the two associated circuits.

Each LED ON indicates its associated circuit is in use.

LED 3 (Green) lit, indicates the TLI-EB ETU is receiving power.

A maximum of twenty TLI-EB ETUs can be installed in a system into any interface slots.

E.ESI-EA/EB ETU

Installing an ESI-EA ETU or ESI-EB ETU provides support for up to four Multiline Terminals and/or EDE- 30-( ) units. (Refer to Figure 200-23). The ESI-EB

ETU is required when a Multiline Terminal is equipped with the DPA-E Unit for the dual path feature, or a DTA-E Unit for data capability.

LED LPl (Green) lit, indicates the ESI-E( 1 is receiving power, LEDs 1- 4 (Red) indicate the status of the four associated circuits. Each LED ON indicates its associated circuit is in use.

NOTE: It is recommended that only the ESI-EA ETU be installed in the fourth CCU, for the support of Multiline Terminals, as thefourth cabinet cannot support the Data and Dual Path features of the ESI-EB ETU.

Figure 200-23 ESI-E( ) ETU Busy Switch with LEDs

A maximum of twenty ESI-E( 1 ETUs can be installed in a system into any interface slot.

F.SLI-EA/EIB ETU

Installing an SLI-EA or SLI-EB ETU provides support

for up to four single line telephones, modems or DkrmIIs. The SLI-EB ETU is required when power failure transfer of .CO lines and/or message wait signaling to single line telephones and/or voice mail messaging is used in the system.

LED1 (Green) lit, indicates that the SLI-E( 1 ETU is receiving power. LEDs 101-401 (Red) indicate the status of the four circuits. Each LED ON indicates its associated circuit is in use.

A maximum of nineteen SLI-E( ) ETUs can be installed in a system into any interface slot. SLI-E( 1 ETUs require the support of at least one RSG-E Unit and an MFR-EA ETU. (Refer to Tables 200-2 and 200-3)

G.MFR-EA ETU

The MFR-EA ETU contains a switch and an LED. When inserting or removing an MFR-EA with power applied to the CCU, Switch1 (SW11 must be set to the OFF position.

LED1 (Green) lit indicates that the MFR-EA ETU is receiving power.

A maximum of four MFR-EA ETUs can be installed in a system into anv interface slot to provide a maximum of 8 circuits. The MFR-EA ETU is required to support the dialing of any SLTs, modems and/or VMI-E ETU installed.