Toshiba DK 16, DK8 manual External Power Straps

INSTALLATION-STATION APPARATUS

SECTION 100-816-206

MARCH 1993

3.60Microphone/Speaker Sensitivity Adjust- ment (Speakerphones Only)

3.61High ambient noise levels may cause the speaker on some digital telephone speakerphone models to cut off frequently. To prevent this for the 1000-series digital telephone models, perform the following procedure to make the telephones less sensitive to the noise: (The 2000-series Tele- phones are adjusted per the instructions in the Note after the procedure.)

1)Loosen the four captive screws securing the 1000-series Digital Telephone speakerphone base (Figure 6-1), and remove the base.

2)For the 1000-series speakerphone model (DKT1020-SD), refer to Figure 6-9, and lo- cate the ROOM NOISE switch. Push the switch carefully to the H (high) position (for low sensitivity) when there is high background noise in the area surrounding the telephone.

3)Reinstall the telephone base, and secure it with its four captive screws.

NOTES:

1.To make the 2000-series Digital Tele- phone speakerphone models less sensi- tive to loud surrounding noise, hold down Mic button, then press the up Vol but- ton. The less-sensitive level will be set after the third flash of the Mic LED. To reset the sensitivity back to the normal level, hold down the Mic button, then press the down Vol button. The normal level will be set after the third flash of the Mic LED.

2.On 2000-series Digital Telephone speak- erphone models that are set for low sen- sitivity, the Mic LED will flash at the in-use rate when using the speakerphone. When set to normal sensitivity, the Mic LED will be on steady when using the speaker- phone.

3.70Busy Override and Camp-on Ring Tone Over Handset/Headset Option

3.71The Busy Override and Camp-on Ring tones can be sent over the telephone handset or head-

set, in addition to the speaker, with 2000-series digital telephones. The tones only sound over the speaker with 1000-series Digital Telephones. Per- form the following procedure to have these tones sent over the handset of the DKT2010-H model: (For the DKT2010-SD, the DKT2020-S, and the DKT2020-SD models, see the Note following the procedure.)

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

2)Refer to Figure 6-7, and install a strap in the HS-BOV W409 location.

3)Reinstall the telephone base, and secure it with its four captive screws.

NOTES:

1.To enable Busy Override tone and Camp- on Ring tones over the handset or head- set of a DKT2010-SD, DKT2020-SD, DKT2020-S model, hold down the Re- dial button and press the up Vol button. To block the tone, hold down the Redial button and press the down Vol button.

2.For this to function properly with head- sets, make sure the OCA strap or R607 is cut on the HHEU PCB and the HHEU strap is cut on the telephone (see Para- graph 3.32).

3.80External Power Straps

3.81Digital telephones equipped with options such as Integrated Data Interface Units and ADMs require two-pair wiring or external power to oper- ate efficiently at the maximum-allowed distance from the key service unit (KSU). Two-pair wiring or external power is also necessary for maximum cable run lengths for digital telephones that are connected to systems that must operate with re- serve power. (See Table 8-D in Section 100-816- 208 for reference.)

Each Digital telephone has two external power straps which must be cut for external power when the cabling of the telephone is connected to an external AC/DC power supply. Cut these straps in accordance with the following procedure:

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