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Station Apparatus
2000-series Telephones
11-46 Strata CTX I&M 06/04
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
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.
Table 11-9 2000 Telephone Subassembly Upgrades
Subassembly
No. per
Phone
Function
BVSU or
DVSU
1
1. Only one of these subassemblies is allowed per telephone: DVSU, BPCI, PDIU-DI or DADM.
1
Off-hook Call Announce (OCA): Provides interface for digital telephone to
receive Speaker OCA. Not required for Handset/Headset OCA.
BHEU or
HHEU
1
Headset and loud ringing bell telephone interface: Can be installed with
DVSU or DADM, but not with the Full-duplex Speakerphone External
Microphone (RFDM). (See “Telephone Headset (BHEU) Upgrade” on page 11-7
for installation instructions.)
DADM2020
1
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.