Toshiba DK 16, DK8 manual HESC-65A Cabling, Hheu Installation for Digital Telephone

INSTALLATION-STATION APPARATUS

SECTION 100-816-206

MARCH 1993

version) and the integrated data interface unit (PDIU-DI) at the same time, but 2000- series digital telephones can support an HHEU and a PDIU-DI2 at the same time.

3.32HHEU Upgrade Installation (HHEU) Install the Loud Ringing Bell/headset upgrade (HHEU) in accordance with the following steps.

1)Loosen the four captive screws securing the telephone base (Figure 6-1), and remove the base.

2)Using a screwdriver or other suitable tool, remove the plastic tab located on the back of the base (Figure 6-1); the HHEU modular connector for the headset will be accessed through this opening.

3)If installing a V.3 HHEU1, set the SW601 switch on the HHEU to HEADSET for the headset or loud bell application (Figure 6-10). V.4 HHEU1 and HHEU2 do not have this switch, because both of these upgrades are automatically set for the headset/loud bell application.

COMPONENT SIDE OF HHEU
R607 (HHEU1 V.1 ~ V.3)	SW601
	(HHEU1 V.1 ~ V.3)
	OCA (HHEU1
	V.4 or HHEU2)
	P601
HHEU

FIGURE 6-10

HHEU INSTALLATION FOR DIGITAL TELEPHONE

4)Connect the HESC-65A cable to P601 of the HHEU (both HHEU1A versions and the HHEU2 have P601) if the Loud Ringing Bell option is required (Figure 6-11). Refer to Section 100-816-207for HESB installation procedures.

5A) For the V.3 HHEU1: If only the headset is connected to the HHEU, cut both sides of the R607 resistor (Figure 6-10), then remove the resistor to eliminate electrical contact.

NOTE:

Do not cut the R607 resistor if connecting an HESB to the HHEU for the Loud Ringing Bell—even if a headset is also installed on the HHEU.

5B) For the V.4 HHEU1 and the HHEU2: If only the headset is connected to the HHEU, cut the OCA strap (Figure 6-10).

NOTE:

Do not cut the OCA strap if connecting an HESB to the HHEU for the Loud Ringing

FEED THROUGH	TO HESB
FOR HESC-65(A) CABLE	BLOCK
	SW601
HESC-65 CABLE
OR
HESC-65A CABLE
HHEU	P601
FIGURE 6-11
HESC-65A CABLING

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