Instruction manual

Strata DK40i
Base KSU Architecture
Strata DK General Description 6/00 11
The CO line interface and DID interface unit can be programmed for DTMF or dial pulse signaling
and each line has a switch to control potential excess volume that could be created by a nearby
PBX or CO. Built-in gas tubes help protect each TDDU and TCOU line from lightning. An
optional RDDU (for DID lines) installed in the Expansion Unit requires an external secondary
protector. DID lines require the optional K5RCU2 tone receiver.
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 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).
ISDN BRI U Circuits (TBUU)
DK BRI U interface circuits can be configured to connect to an ISDN line circuit (NT mode, line-
side) or to ISDN U-type terminal equipment TE1 or terminal adapters TA (LT mode, station side).
The TBUU provides two BRI-U circuits that can be configured independently for line or station
circuits.
Note The TBSU and TBUU contains two circuits, each of which reduces the system capacity by
two station ports or two CO lines. If the BRI circuit is configured as 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.
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 “Caller ID Interface Unit (RCIU2)” on Page
41 and “Caller ID” on Page 69 for more information.
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.