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Station Apparatus
3000-series Telephone Option PCBs
Strata CTX I&M 06/04 11-5
Station Apparatus
Telephone Speaker Off-hook Call Announce Upgrade (BVSU)
To receive Speaker Off-hook Call Announce (OCA) calls over the digital telephone speaker, a
digital telephone must be upgraded with a BVSU; the telephone making the call does not require a
BVSU. Digital telephones do not require an additional wire pair to receive Speaker OCA call. The
BVSU is not necessary to receive handset OCA.
BVSU Upgrade Installation for DKT3000-series Telephones
1. Loosen the four captive screws on the telephone base and remove the base (see Figure 11-2).
2. On the BVSU (see Figure 11-1, set strip pins SW1 and SW2 per Table 11-5.
Figure 11-1 Speaker Off-hook Call Announce Upgrade (BVSU1A)
3. Slide the BVSU under the tabs.
4. Position the BVSU holes over the standoffs and secure with the two provided screws. (Two
large head screws for DKT3000s, four smaller head crews for the DKT2000.)
5. Connect the BVSU wire plugs to the two “PCI/VSU” connectors on the PCB inside the phone,
with the red wire on the side where “RED” is silk-screened on the DKT PCB (see Figures 11-7
and 11-8).
6. Reinstall the telephone base and secure it with its four captive screws
Table 11-5 BVSU Jumper Settings
Control/Indicator/
Connector
Type of Component Description
SW1 6-terminal jumper plug
30 (default) - use for DKT3000 telephones.
20 Mu - use for DKT2000 telephones in Mu Law
countries, including U.S. and Canada.
20A - use for DKT2000 in A Law countries.
SW2 3-terminal jumper plug
SPF (default setting). Use for all DKT3000
DKT2000 telephones, except the DKT2010-H.
HFU - use for DKT2010-H telephones.
6068
BVSU1A
HFU
SPF
SW2
SW1
20 Mu
20 A
30