Appendix – Specifications
Standard Telephone Ringer Specifications
78 Strata CTX General Description 11/02
Standard Telephone Ringer Specifications
Specifications for standard telephone ringers appear in Table 27.
Table 27 Standard Telephone Ringer Specifications
3000-series Telephone Option PCBs
Digital telephones can be upgraded with option PCBs to add a number of features. Each of these
upgrades shares a circuit with the telephone that it is connected to and is not considered a station.
See Table 28 for more information.
Station Dimensions
Dimensions for the 3000-series telephones and related station equipment are listed in Table 29.
RSTU3 or RDSU
Ring voltage 80V RMS sine wave
Ringing capability RSTU3: 3.0 REN per circuit
RDSU: 1.5 REN per circuit
RSTU3 Message Waiting voltage -90 VDC/one telephone per circuit (max.)
RSTU3 modem interface data rate 14,400 bps maximum
Table 28 3000 Telephone Subassembly Upgrades
Subassembly
No. per
Phone
Function
BVSU
1
1. Telephones with the BPCI cannot have Speaker OCA (BVSU) or Add-on modules. Also, DKT3001 telephones cannot
have CTI (BPCI), Speaker OCA (BVSU) or Add-on modules.
1
Speaker 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 external ringer telephone interface: Can be installed with
BVSU, BPCI or DADM.
BPCI
1
1 Desktop PC Interface for CTI applications.
DADM3020
1
1 or 2
Add-on Module (ADM): Provides telephone with 20 (or 40 with two
ADMs) additional feature buttons.
Table 29 Station Dimensions
Device Height Width Depth
10-button Digital Speakerphone (DKT3010-S)
4.0 inches
(101.5 mm)
8.1 inches
(205 mm)
9.3 inches
(235 mm)
10-button Digital Speakerphone with LCD (DKT3010-SD)
4.0 inches
(101.5 mm)
8.1 inches
(205 mm)
9.3 inches
(235 mm)
20-button Digital Speakerphone (DKT3020-S)
4.0 inches
(101.5 mm)
8.1 inches
(205 mm)
9.3 inches
(235 mm)
20-button Digital Speakerphone with LCD (DKT3020-SD)
4.0 inches
(101.5 mm)
8.1 inches
(205 mm)
9.3 inches
(235 mm)
14-button Digital Speakerphone with Large LCD (DKT3014-SDL)
4.0 inches
(101.5 mm)
8.1 inches
(205 mm)
9.3 inches
(235 mm)
