2000/2500-Series Telephones; 2000/2500-Series Telephone Option Pcbs - Toshiba Strara CTX Series Installation And Maintenance Manual

Station Apparatus
LCD Low Battery Indicator
When the battery pack in the handset is low and needs to be charged you see this message on the
display and the handset beeps.
Table 7-7 Low Battery Symptoms
Only the TALK key operates.
Handset beeps once every three seconds
Complete your call as quickly as possible
Replace battery pack.
To restore your battery capacity
Return the handset to the base unit for charging or replace the handset battery pack with another
charged one.

2000/2500-series Telephones

The 2000/2500-series digital telephones consist of four models:
DKT2010-S/2510-S – 10-Button Digital Speakerphone
DKT2020-S/2520-S – 20-button Digital Speakerphone.
DKT2010-SD/2510-SD – 10-Button Digital Speakerphone with Liquid Crystal Display.
DKT2020-SD/2520-SD – 20-Button Digital Speakerphone with LCD.
DKT2020-FDSP (Not available in the UK & Europe) – Same as DKT2020-SD with Full-duplex
Speakerphone.

2000/2500-series Telephone Option PCBs

Table 7-8 2000/2500 Telephone Subassembly Upgrades
No. per
Subassembly
Phone
BVSU or
1
1
DVSU
BHEU or
1
HHEU
1
DADM2020 1 or 2
1. Only one of these subassemblies is allowed per telephone: DVSU, BPCI, PDIU-DI or DADM.
7-36
Table 7-7 shows symptoms.
On a Call...
Off-hook Call Announce (OCA): Provides interface for digital telephone to receive
Speaker OCA. Not required for Handset/Headset OCA.
Headset and loud ringing bell telephone interface: Can be installed with DVSU or
DADM, but not with the Full-duplex Speakerphone External Microphone (RFDM).
(Installation instructions are in
(BHEU) to External Speaker (HESB) Cable Connection" on Page
ADM, DSS: Provides telephone with 20 (or 40 with two DADMs) additional feature
buttons for DSS, System or Station speed dial, or Exchange line appearances.
In Standby Mode...
None of the keys operate.
Handset beeps once.
Cannot make call.
Replace battery pack before making a call.
Function
Chapter – Peripheral Installation, see
Strata CTX I&M September 2002
"Telephone
8-18.