Station Apparatus
2000-series Telephones
Strata CTX I&M 10/02 8-37
Station Apparatus
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 8-24 on page
8-26).
2. Loosen the four captive screws on the metal plate to the standoffs inside the base. Remove and
discard the plate.
3. For the BVSU only, make sure that the SW1 and SW2 pins are set per Figure 8-30 and Table
8-5 on page 8-5.
Figure 8-30 Speaker Off-hook Call Announce Upgrade (BVSU1A)
4. Position the BVSU/DVSU PCB on the
standoffs), and secure with the four
provided screws (seee Figure 8-31).
5. Connect the BVSU/DVSU wire plugs to
the VSU connectors on the PCB inside
the phone.
6. Reinstall the telephone base. Secure it
with its four captive screws.
6073
BVSU1A
HFU
SPF
SW2
SW1
20 Mu
20 A
30
Move jumper to
the middle position
(20 Mu) for
DKT2000 phones
To PCI/VSU
Connectors
on Telephone
Red Wire
Fasten
Four
Screws
6072
Figure 8-31 BVSU/DVSU Installation
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