Telephone Equipment and Service

The Strata DK40 Base KSU contains the main processor, operating software, circuitry and the following components:

The main circuit board (TMAU2) in the Strata DK40 Base KSU has eight integrated circuits that can connect to Toshiba-proprietary digital telephones (including the cordless telephone), Stand-alone Data Interface Units (PDIU-DSs), Digital Door Phone/Lock Control Units (DDCB), and Digital Direct Station Selection Consoles (DDSS). Furthermore, each of the digital telephones can support a PC Data Interface Unit (RPCI-DI) or up to two Add-on Modules (DADMs).

The Strata DK40i Base KSU contains the main processor, operating software, circuitry and the following components:

The main circuit board (TMAU2) in the Strata DK40i Base KSU has eight integrated circuits that can connect to Toshiba-proprietary digital telephones (including the cordless telephone), Stand-alone Data Interface Units (PDIU-DSs), Digital Door Phone/Lock Control Units (DDCB), and Digital Direct Station Selection Consoles (DDSS). Furthermore, each of the digital telephones can support a PC Data Interface Unit (RPCI-DI) or up to two Add-on Modules (DADMs).

provides four circuits for loop start CO lines.

provides four circuits for Direct Inward Dialing (DID) lines.

Provides two circuits for BRI lines or stations

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).

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.

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.

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

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 DK Admin PC or external modem for system maintenance/administration, or an SMDI interface for Voice Mail. It does not have a built-in modem capability.

Only one TSIU can be installed per DK40i system. When the TSIU PCB is installed, the PIOU can still be installed for zone paging, control relays, and an SMDR RS-232 interface, built-in (IMDU) maintenance modem, or an SMDI or maintenance interface.

The optional Expansion KSU, which attaches easily to the side of the Base KSU, offers four universal slots that can host a variety of line and telephone PCBs Expansion

The KCDU provides two analog loop start CO line circuits and four digital telephone circuits. The CO line circuits offer all of the features that the Base TCOU and the RCOU line circuits provide. The digital telephone circuits can support every peripheral (except for the DDSS console) that the PDKU2 and a Base KSU digital circuit can support. Up to four KDCU PCBs can be installed in the DK40i Expansion Unit.

Note The RCIU2 Caller ID Interface Unit is required to add Caller ID with the KCDU PCB.

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.

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.