Toshiba CTX28 manual Series Telephones, Series Telephone Option PCBs, 11-46

Station Apparatus

2000-series Telephones

2000-series Telephones

The 2000-series digital telephones consist of four models:

•DKT2010-S – 10-Button Digital Speakerphone

•DKT2020-S – 20-button Digital Speakerphone

•DKT2010-SD – 10-Button Digital Speakerphone with Liquid Crystal Display

•DKT2020-SD – 20-Button Digital Speakerphone with LCD

•DKT2020-FDSP – Same as DKT2020-SD with Full-duplex Speakerphone

2000-series Telephone Option PCBs

Table 11-9 2000 Telephone Subassembly Upgrades

Subassembly	No. per	Function
	Phone
BVSU or	1	Off-hook Call Announce (OCA): Provides interface for digital telephone to
DVSU1		receive Speaker OCA. Not required for Handset/Headset OCA.
		Headset and loud ringing bell telephone interface: Can be installed with
BHEU or	1	DVSU or DADM, but not with the Full-duplex Speakerphone External
HHEU		Microphone (RFDM). (See “Telephone Headset (BHEU) Upgrade” on page 11-7
		for installation instructions.)
DADM20201	1 or 2	ADM, DSS: Provides telephone with 20 (or 40 with two DADMs) additional
		feature buttons for DSS, System or Station speed dial, or CO line appearances.

1. Only one of these subassemblies is allowed per telephone: DVSU, BPCI, PDIU-DI or DADM.

Telephone Speaker Off-hook Call Announce Upgrade (DVSU/ BVSU)

To receive Speaker Off-hook Call Announce (OCA) calls over the digital telephone speaker, a 2000-series digital telephone must be upgraded with a DVSU or BVSU; the telephone making the call does not require a DVSU or BVSU. Digital telephones do not require an additional wire pair to receive Speaker OCA call.

BVSU/DVSU Upgrade Installation for DKT2000-series Telephones

1.Loosen the four captive screws on the telephone base and remove it (see Figure 11-24 on page 11-27).

2.Loosen the four captive screws on the metal plate to the standoffs inside the base. Remove and discard the plate.

11-46 Strata CTX I&M 06/04