Isdn Bri S/T Circuits (Tbsu); Caller Id (Tciu2); Standard Telephone Interface Unit (Kstu2); Dtmf/Abr Tone Detection Receiver (K5Rcu And K5Rcu2) - Toshiba Strata DK14 General Description Manual

Strata DK40i
Base KSU Architecture

ISDN BRI S/T Circuits (TBSU)

The TBSU PCB provides two Basic Rate Interface (BRI) circuits for DK40i. The TBSU can only
be installed in the DK40i Base KSU.
The TBSU contains two circuits, each of which reduces the system capacity by two station ports or
two CO lines. If the BRI circuit is configured a station circuit, the circuit assumes two station
ports. If the BRI circuit is configured as a line circuit, the circuit assumes two CO lines. BRI lines
can be used for voice and data calls.
The TBSU circuits are four-wire S/T type circuits and connect to the PSTN BRI lines using a
dealer-supplied UL-listed Network Terminator unit (NT1). In Canada, the NT-1 must be CSA
certified. On the station side, they can connect to S-type ISDN Terminal Equipment (TE) or
Terminal Adapters (TA).

Caller ID (TCIU2)

An optional Caller ID PCB (TCIU2) can be added to the four-circuit loop start CO line PCB
(TCOU) to provide four Caller ID circuits. Local telephone companies do not provide Caller ID on
DID lines; so the TCIU2 PCB cannot be added to the four-circuit DID PCB (TDDU). Caller ID
can also be added with the RCIU2 and KCDU2. See
41 and "Caller ID" on Page 65

Standard Telephone Interface Unit (KSTU2)

The optional KSTU2 provides four circuits that can interface with DTMF for rotary dial standard
telephones and other single-line devices, including: Strata AirLink Wireless Base Station Interface
Adapters (BSIAs) and handsets, fax/modems (14.4 bps max.), Voice Mail and Auto Attendant
devices, off-premises stations, alternate BGM source and dictation equipment. These devices may
require that the optional tone receiver (K5RCU or K5RCU2) be installed in the DK40i Base KSU
to interpret the DTMF signals the above devices may transmit.
The KSTU2 does not support message waiting lamps on standard telephones. The RSTU2 must be
installed in the Expansion Unit to support message waiting lamps.

DTMF/ABR Tone Detection Receiver (K5RCU and K5RCU2)

Station users in systems that have the optional K5RCU or K5RCU2 installed can access Automatic
Busy Redial (ABR) and communicate with devices, such as standard telephones or voice mail
machines that require DTMF signaling.
This unit is also required for Direct Inward System Access (DISA) and built-in or external Auto
Attendant operation, as well as for DID and Tie lines. Each K5RCU or K5RCU2 PCB contains
five shared receivers.

Auto Attendant Feature Key (KKYS)

The system can be upgraded with an optional built-in Auto Attendant (AA). The KKYS installs
onto the K5RCU PCB in the Base KSU.

SMDR, SMDI, and Maintenance DKAdmin/Modem (TTY) Interface (TSIU)

The TSIU PCB provides two RS-232 interface ports (modular jacks) that allow the DK40i system
to connect to an SMDR Call Accounting device, a DKAdmin PC or external modem for system
maintenance/administration, or an SMDI interface for Voice Mail. It does not have a built-in
modem capability.
12
"Caller ID Interface Unit (RCIU2)" on Page
for more information.
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