Toshiba Strata Dk14, Dk40i, Dk424 Programming Manual

							Glossary
DKAdmin ~ DVSU
Strata DK Programming 5/99GL-3
Glossary
DKAdmin Toshibas customer database programming and upload/download software package 
for Strata DK systems.
DKBackup Toshiba’s customer database upload/download software package for Strata DK 
systems.
DKT Digital Telephone.
DKT2000 seriesToshiba proprietary digital telephones consisting of four models: two 10-button 
models with handsfree answerback and/or LCD display and two 20 button 
telephones with speakerphone or a speakerphone with LCD display.
DKSU14AStrata DK14 Key Service Unit (KSU) with power supply. Equipped with two loop 
start CO line circuits and four digital telephone circuits built-in. Includes external 
page interface, MOH/BGM interface, power failure transfer and miscellaneous 
relay control.
DKSUB280 or 
DKSUB424 Base Cabinet—Unit that houses the Common Control Unit (RCTU), as well as six 
universal slots for station, line, and option PCBs. The Base Cabinet also contains a 
power supply that provides power for all of the stations and peripherals connected 
to the base cabinet PCBs.
DKSUE280 or 
DKSUE424 Expansion Cabinet—Optional unit that has six universal slots for station, line, and 
option PCBs. The expansion cabinet has a power supply that furnishes power for all 
of the stations and peripherals connected to the expansion cabinet PCBs. As many 
as five expansion cabinets can be added to the system.
DKSUBI40Strata DK40i Base Key Service Unit (KSU) with power supply and battery charger. 
Equipped with eight digital telephone circuits built-in, and no CO line circuits. 
Includes external page interface, MOH/BGM interface, power failure transfer and 
miscellaneous relay control.
[DN] Directory Number.
DNIS Dialed Number Identification Service—Telephone number of called party is sent to 
the Strata DK over incoming DID or tie lines. This feature is provided by some long 
distance telephone companies.
DPFT Power Failure/Emergency Transfer Unit—An optional backup unit that provides 
emergency service during power failures by automatically connecting up to eight 
standard telephones to designated CO lines.
DSS Direct Station Selection—Feature which allows a telephone user (as well as a DSS 
console and ADM user) to call another station with the touch of a flexible feature 
button.
DTMF Dual-tone Multi-frequency—Push-button tone dialing.
DVSU A subassembly that equips a digital telephone with the capability to receive Speaker 
Off-hook Call Announce (OCA) calls. DVSU is not required to receive Handset 
OCA (HS-OCA).
Term Definition 
						

							Glossary
E911 ~ ISDN
GL-4Strata DK Programming 5/99
E911Enhanced 911 operation that provides more complete locator information to the 
responding agency. 
EKT Electronic Telephone.
ESFExtended Super Frame.
EOCU Off-hook Call Announce Subassembly—An optional upgrade to the Electronic 
Telephone Interface Unit (PEKU) or Electronic Telephone/Standard Telephone 
Interface Unit (PESU) that enables properly configured telephones (see HVSU2) to 
receive Off-hook Call Announce (OCA) calls.
FCC Federal Communications Commission—The federal agency which regulates the 
telecommunication industry. All Toshiba hardware is FCC listed or approved.
HDCB Electronic Door Phone/Lock Control Unit—A peripheral hardware unit compatible 
with designated electronic telephone circuits that supports optional door phones 
(MDFBs) and provides door lock control.
HDSS Electronic Direct Station Selection Console—A device that helps facilitate the 
processing of a heavy load of incoming calls. The HDSS console connects only to 
designated electronic telephone circuits, and is associated with electronic 
telephones.
HESB External Speaker Box—A speaker/amplifier that can be configured with the system 
to provide a variety of functions, such as a paging speaker and/or Background 
Music (BGM) speaker.
HESC-65A A cable used to connect an HHEU-equipped digital telephone or an HHEU-
equipped electronic telephone to the external speaker box (HESB) for the Loud 
Ringing Bell feature.
HHEU Headset/Loud Ringing Bell Interface—Subassembly that fits inside a digital 
telephone or a 6500-series electronic telephone to allow a headset or an external 
speaker box (HESB) to be connected to the telephone.
HPFBOptional Reserve Power Battery Charger (DK14)—One or two can be connected to 
the power supply to maintain normal operation during a power failure.
HVSU2 Subassembly that fits into a 6500-series electronic telephone enabling it to receive 
Off-hook Call Announce (OCA) calls. The telephone must be connected to an 
Electronic Telephone Interface Unit (PEKU) or a Standard Telephone/Electronic 
Telephone Interface Unit (PESU) equipped with an Off-hook Call Announce 
Subassembly (EOCU) to receive OCA, and must have three-pair wiring.
IMDU Remote Maintenance Modem Subassembly—A subassembly installed on an Option 
Interface Unit (PIOU or PIOUS) that allows the system to be connected with a 
remote administration/maintenance terminal or DK Admin/DK Backup personal 
computer.
ISDNIntegrated Services Digital Network.
Term Definition 
						

							Glossary
K4RCU3 ~ OCA
Strata DK Programming 5/99GL-5
Glossary
K4RCU3Dual-Tone Multi-Frequency (DTMF) Receiver/ABR Tone Detector Unit—An 
optional PCB installed on the TMAU motherboard. The K4RCU3A must be 
installed to recognize Dual-Tone Multi-Frequency (DTMF) tones generated by a 
standard telephone (or any other device connected to a standard telephone circuit) 
and it is required for Direct Inward System Access (DISA) and DID. The 
K4RCU3A circuits are also used to detect busy tone for the Automatic Busy Redial 
(ABR) feature and must be installed to allow ABR to operate.
KCDUCO Line/Digital Telephone Interface Unit (DK40i)—The KCDU has two loop start 
CO line circuits and four digital telephone circuits. The KCDU digital telephone 
circuits can support all but one of the devices supported by either the PDKU or 
Base Unit integrated digital telephone circuits: digital telephones, PDIU-DIs/PDIU-
D12s, PDIU-DSs, ADMs, DDCBs and RPCIs.
KKYSModular add-on key or integrated circuit that installs onto the K4RCU3 to add the 
auto attendant feature to the DK40i.
KSTU2The optional PCB provides four standard telephone circuits and it can only be 
installed in the base unit. The KSTU2 supports the two-wire devices such as 
standard telephones, Auto Attendant devices, voice mail machines, and facsimile 
machines. The KSTU2 can also support an alternate Background Music (BGM) 
source on circuit four.
LATALocal Access and Transport Area.
LCD Liquid Crystal Display—The optional display on digital and electronic telephones 
that displays calling information.
LCR Least Cost Routing.
LDI Long Distance Information.
LED Light Emitting Diode—Status indicators located on printed circuit boards (PCBs), 
digital telephones, and electronic telephones.
LSI Large Scale Integration—Related to circuit design technology. Strata DK system 
printed circuit boards (PCBs) use LSI circuit design.
MDF Main Distribution Frame—The wiring frame usually located in a phone closet.
MDFB Door Phone Box—A peripheral two-way speaker box option.
MOH Music-on-Hold—Customer-supplied music or announcements can be sent to parties 
on-hold on CO lines or the intercom. 
NDTUToshiba 30-foot cable that connects the RDTU to the KSU.
NT-1Used in ISDN. Network Termination device that powers a U-interface ISDN line 
and enables multiple S/T ISDN devices to connect to it. The NT-1 must be 
UL-listed (U.S.) or CSA-certified (Canada).
OCA Off-hook Call Announce. There are two types: Handset OCA and Speaker OCA.
Term Definition 
						

							Glossary
OPS ~ PEPU
GL-6Strata DK Programming 5/99
OPS Off-premises Station. 
PBTC A Toshiba-supplied cable used to connect customer-supplied batteries to a cabinet 
power supply in a one- or two-cabinet system for emergency reserve power for the 
entire system.
PBX Private Branch Exchange—Industry-standard term which refers to a telephone 
switch, usually on-premises, which serves an individual company, and is connected 
to a public telephone exchange through the Central Office (CO).
PCB Printed Circuit Board.
PCMPulse Code Modulation—A widely-used form of digital telephone switching.
PCOU CO Line Interface Unit—An optional PCB (an older version of RCOU) that 
provides the system with four loop start CO lines. Supports Caller ID when used 
with RCIU/RCIS circuits.
PDIU-DI2 Integrated Data Interface Unit—Replaces the normal digital telephone base so that 
the telephone can be used for the transmission and reception of data between a 
terminal/personal computer connected to the telephone and devices connected to 
other PDIU-DIs or to modems, printers, and computers which are in turn connected 
to PDIU-DSs. The PDIU-DI is also used to provide personal computer auto dialing 
of voice calls without a modem; and, access to outside dial-up data services and/or 
bulletin boards via modem pooling.
NoteReplaced by RPCI-DI.
PDIU-DS Stand-alone Data Interface Unit—Used for modem pooling, printer sharing, and 
accessing host/mainframe computer.
PDKU2 Digital Telephone Interface Unit—An optional PCB that provides the system with 
eight digital telephone circuits. In addition to digital telephones, the PDKU can 
support data interface units (stand-alone and integrated), a digital DSS console 
(DDSS), RPCI, ADM, and a digital door phone/lock control unit (DDCB).
[PDN] Primary Directory Number.
PEKU Electronic Telephone Interface Unit—An optional PCB that provides the system 
with eight electronic telephone circuits, which can support electronic telephones, a 
Background Music source, a door phone/lock control unit (HDCB), an electronic 
DSS console (HDSS), and amplifiers for two CO-line conference calls. The PEKU 
is also used with older Strata systems.
PEMU E & M Tie Line Unit—An optional PCB (an older version of REMU) that provides 
the system with support for four E & M Type I tie lines. The PEMU is also used 
with older Strata systems. 
PEPU External Page Interface Unit—An optional PCB that provides support and/or circuit 
interface mainly for optional hardware peripherals and upgrades associated with 
external paging functions.
Term Definition 
						

							Glossary
PESU ~ QCDU2
Strata DK Programming 5/99GL-7
Glossary
PESU Standard/Electronic Telephone Interface Unit—An optional PCB that provides the 
system with a combination of two standard and four electronic telephone circuits. 
The standard telephone circuits can support standard telephones and optional 
hardware peripherals, such as voice mail devices and fax machines. Except for the 
electronic DSS console, the PESU electronic telephone circuits can support the 
same stations and peripherals that the PEKU does. The PESU is also used with 
older Strata systems.
[PhDN] Phantom Directory Number.
PIOU Option Interface Unit—An optional PCB that provides support and/or circuit 
interface for optional hardware peripherals and upgrades.
PIOUS The same as the PIOU, with some exceptions; most notably, the PIOUS has one 
external paging interface zone, while the PIOU has four.
PORT A term used to identify a station circuit or CO line circuit location.
PBTC1A-3M Battery cable that connects reserve power batteries to cabinet RPSU280 power 
supplies (102 cabinet installations).
PPTC A Toshiba-supplied adapter—An adapter that is used to connect: an SMDR device, 
ASCII maintenance terminal, or remote maintenance external modem.
PPTCA Toshiba-supplied adapter—An adapter that is used to connect: the modular 
SMDR, SMDI, MIS for ACD, Open Architecture (OA), maintenance ports of the 
PIOU, PIOUS, RSSU, RSIU, or RSIS to the DB-9 (PPTC-9) connector of a call 
accounting machine, DK Admin, DK Backup personal computer (PC), SMIS 
personal computer or Open Architecture personal computer.
PPTC-9Designed to connect directly to the DB9 connector of PC COM ports, while PPTC 
connects directly to an ASCII terminal female DB25, not a PC COM port male 
DB25.
PPTC-25FUsed to connect a Call Center Viewer PC or SMIS PC to the RS-232 Strata DK424 
MIS port on the PIOU, PIOUS, RSIU, or RSSU.
PRIPrimary Rate Interface.
PSTU2 Standard Telephone Interface Unit—An optional PCB (an older version of RSTU2) 
with a built-in ring generator that provides interface for eight standard telephones or 
optional hardware peripherals (voice mail devices, Background Music source, fax 
machines, etc.). The PSTU2 has a square wave ring generator that can be set for 
190V peak-to-peak or 130V peak-to-peak. The PSTU2 is also used with older 
Strata systems.
PSTNPublic Switched Telephone Network.
QCDU2CO Line Digital Telephone Interface Unit (DK14)—Provides one CO line (loop 
start) circuit and two digital telephone circuits on each PCB. The QCDU2 interfaces 
with digital telephones, PDIU-DIs/PDIU-DI2s/RPCI-DI, ADMs connected to the 
telephones and PDIU-DSs, but does not support a DDSS or DDCB console.
Term Definition 
						

							Glossary
QKYS ~ RCMS
GL-8Strata DK Programming 5/99
QKYSAuto Attendant Feature Key (DK14)—Provides built-in Auto Attendant software 
without Program 03 assignments and installs directly onto the QRCU3 PCB.
QSTU2Standard Telephone Interface Unit (DK14)—Provides two standard telephone 
circuits (ports) and interfaces with standard telephones, Auto Attendant devices, 
separate BGM source connections, voice mail machines, and facsimile machines.
QRCU2DTMF Receiver/ABR Tone Detector Unit (DK14)—Provides three circuits to 
receive DTMF tones (required for DISA and devices connected to QSTU2s), and 
three circuits to detect busy tone (required for the ABR feature).
RAM Random Access Memory—Refers to the type of system memory that holds 
individual system configuration and feature programming. RAM is read/write 
memory, and can be easily revised in programming.
RATU Attendant Console Interface Unit—Optional PCB that can support up to four 
attendant consoles and/or PC attendant consoles.
RBDB Battery Distribution Box—Interface used to connect reserve power batteries to 
systems with three or more cabinets (also provides six RBTC1A-1.5M cables to 
connect RBDB to cabinet RPSU280 power supplies).
RBSUISDN Basic Rate Interface (BRI) Unit—Provides two circuits, each of which 
provide two simultaneous voice and/or data connections with a single interface. 
BRI uses the 2B+D transmission format which is defined as two 64-kbps bearer 
channels and one 16-kbps data (control channel). Available for DK424 with 
Release 4.1.
RBSSISDN Basic Rate Interface (BRI) Subassembly—Attaches to the RBSU to provide 
two additional  BRI “U” circuits that can be used to connect to Network BRI lines 
and/or station-side connections only. Available for DK424 with Release 4.1.
RBTC1A-2M Battery cable that connects reserve power batteries to RBDB battery distribution 
box (3 or more cabinet installations).
RBUUISDN Basic Rate Interface (BRI) Unit—Provides two BRI “U” circuits. Each 
circuit provides two simultaneous voice and/or data connections with a single 
interface. BRI uses the 2B+D transmission format which is defined as two 64-kbps 
bearer channels and one 16-kbps data (control) channel. Available for DK424 with 
Release 4.2.
RBUSISDN Basic Rate Interface (BRI) Subassembly—Attaches to the RBUU to provide 
two additional BRI “U” circuits that can be used to connect to Network BRI lines 
and/or station-side connections only. An RBUU with the RBUS subassembly 
provides four BRI “U” circuits in one card slot. Available for DK424 with Release 
4.2.
RCMSEnhanced 911 (E911) CAMA Trunk Direct Subassembly—Enables the DK424 
(Release 4.0 and above) to connect to one or two CAMA trunks. Two RCMS PCBs 
enable connection to four CAMA trunks.
Term Definition 
						

							Glossary
RMCU ~ RGLU
Strata DK Programming 5/99GL-9
Glossary
RMCUEnhanced 911 (E911) CAMA Trunk Direct Interface—Enables connection from the 
DK424 (Release 4.0 and above) to E911 locator services without third-party 
equipment. The RMCU supports two subassemblies (RCMS) that provide a total of 
up to four ports.
RCCB Conduit Connection Box—Device required for floor-mounted systems with three or 
more cabinets to connect AC power and reserve power battery cabling to the 
system. Cabling from the AC power source and from the reserve power battery 
source can only be installed by a licensed electrician.
RCIU2/RCIS Four-circuit plug-in PCB/four-circuit piggy-back PCB, each of which receives and 
decodes FSK Caller ID (CLID or CND) information from the Central Office ground 
or loops Caller ID lines. Each RCIU/RCIS circuit works in conjunction with a 
DK424 RGLU/RCOU/RCOS line PCB circuit.
RCOS Loop Start CO Line Interface Subassembly—Optional subassembly that attaches to 
the RCOU PCB to provide four additional CO analog line circuits to the PCB. 
Supports Caller ID when used with RCIU/RCIS circuits.
RCOU CO Line Interface Unit—An optional PCB that provides the system with four loop 
start CO lines. An optional RCOS subassembly can be attached to the RCOU for 
four more loop start analog CO lines. Supports Caller ID when used with RCIU/
RCIS circuits.
RCTU Common Control Unit—The system’s controller PCB that contains the systems 
main microprocessor and microprocessor bus, ROM, RAM, time switch logic, busy 
tone detectors, system tones and MOH/BGM Interface. RCTUs include: RCTUA, 
RCTUB, RCTUBA/BB, RCTUC/D, and RCTUE/F. Each RCTU supports different 
station and line capacities. The RCTU PCBs also provide interface for the optional 
RRCS PCB and RKYS key.
RDDU Direct Inward Dialing Interface Unit—Optional PCB that provides four analog 
Direct Inward Dialing line circuits. Supports ANI and DNIS.
RDSU Digital/Standard Telephone Interface Unit—Optional PCB that provides two 
standard telephone and four digital telephone circuits in its basic configuration. An 
RSTS can be attached to the RDSU for two additional standard telephone circuits.
RDTU T1/DS-1 Interface Unit—Optional PCB that provides up to 24-digital channels that 
can individually be assigned for loop start CO line, ground start CO line, E & M tie 
line, or DID line operation. Supports ANI and DNIS.
REMU E & M Tie Line Unit—An optional PCB that provides the system with support for 
four E & M Type I or Type II, Immediate or Wink Start tie lines. Supports ANI and 
DNIS.
RFIF Floor Mount Installation Kit—Kit that is used to floor mount systems.
RGLU Analog Ground/Loop Start CO Line Interface Unit—Provides four CO line circuits 
that can be individually configured for loop start or ground start CO line operation. 
Supports Caller ID when used with RCIU/RCIS circuits.
Term Definition 
						

							Glossary
RKYS ~ RSIS
GL-10Strata DK Programming 5/99
RKYS Feature Key Upgrade—Subassembly that attaches to the common control unit to 
provide the system with optional features. There are four versions of the RKYS: the 
RKYS1, the RKYS2, the RKYS3 and the RKYS4, each of which provides a distinct 
set of features.
RMDS Remote Maintenance Modem Subassembly—A subassembly installed on the RSIU 
Optional Interface Unit that allows the system to be connected with a remote 
administration/maintenance terminal or DK Admin/DK Backup personal computer.
RPCI-DIComputer Data Interface Unit—Replaces the normal telephone base and provides 
all the functions of PDIU-D12. In addition, it can be switched to a second mode 
automatically and used with a Telephone Application Program Interface (TAPI) 
software application.
RPTUISDN Primary Rate Interface (PRI) Unit—Provides 1 data (control) channel and 23 
bearer channels.All B-channels appear and program as CO lines in the DK424 
system and can be individually configured for local service, FX, WATS, DID, tie, 
etc., service operation. Supported by the RCTUBA3/BB4, RCTUC3/D4 and 
RCTUE3/F4.
ROM Read Only Memory—Refers to the type of system memory that holds static 
software that comprises the mechanics of the features’ functions. ROM is only 
revised by Toshiba software engineers.
RPSB (1 and 2) Power Strip—Interface between cabinet power supplies and the commercial AC 
power source. The RPSB provides outlets for three power supplies. One RSPS is 
required for systems with three or four cabinets, two or three RSPSs for five- or six-
cabinet systems.
RPSU280 Cabinet Power Supply—Furnishes power to all of the stations and peripherals 
connected to the cabinet PCBs. Each Base and optional expansion cabinet has a 
separate power supply.
RRCS Dual-tone Multi-frequency Receiver—An optional upgrade to the system common 
control unit (RCTU) that provides Dual-tone Multi-Frequency (DTMF) receivers 
for system Direct Inward System Access (DISA) CO lines, E&M tie lines, DID, 
DNIS and ANI lines, Auto attendant announcement devices, remote change of call 
forward-external destination, DNIS external call routing, and stations and other 
peripherals that connect to standard telephone circuits. The RRCS comes in three 
models: the RRCS-4 (provides four DTMF receivers), the RRCS-8 (eight DTMF 
receivers), and the RRCS-12 (12 DTMF receivers).
RSIS Optional RS-232 Serial Interface Unit—A subassembly installed on the RSIU 
optional interface unit that allows the system to be connected to any of the 
following features: voice mail SMDI, MIS for ACD, SMDR, local DK Admin/DK 
Backup personal computer, external maintenance modem, Open Architecture 
personal computer.
Term Definition 
						

							Glossary
RSIU ~ TAPI
Strata DK Programming 5/99GL-11
Glossary
RSIU Optional RS-232 Serial Interface Unit—An optional PCB that provides interface to 
any of the following features: voice mail SMDI, MIS for ACD, SMDR, local or 
remote DK Admin/DK Backup Personal computer, built-in (RMDS) or external 
system maintenance modem, Open Architecture personal computer. By itself, the 
RSIU PCB provides one interface port. With up to three RSIU/RMDS 
subassemblies, it can provide up to four interface ports.
RSTU Standard Telephone Interface Unit—An optional PCB (an older version of RSTU2) 
with a built-in ring generator that provides interface for eight-standard telephones 
or optional hardware peripherals (voice mail devices, Background music source, 
fax machines, etc.). The RSTU has a built-in 80V RMS sine wave ring generator. 
The RSTU also has connectors for the R48S, which extends station loop length and 
is described in this section.
RSTU2 Standard Telephone Interface Unit—An optional PCB functionally identical to the 
RSTU. RSTU2 also contains a 90-volt DC message waiting/generator/switching 
circuit to operate standard telephone message waiting lamps.
RWBF1Wall bracket Fixture—Bracket that is part of an installation kit (RFIF) that is used 
to floor mount systems.
RWIU/WWISStrata AirLink Wireless System Interface Unit—A proprietary PCB that enables 
wireless telephone functionality to Strata DK systems.
RFMF Floor Mount Fixture—Fixture that is part of an installation kit (RFIF) that is used to 
floor mount systems.
R48S Optional 48V Power Supply—Subassembly that can be connected to the RSTU or 
RDSU to extend the loop length of standard telephone circuits (including the 
resistance of the phone) from 600 ohms to 1200 ohms.
[SDN] Secondary Directory Number.
SFSuper Frame.
SLTSingle-line Telephone.
SMDI Simplified Message Desk Interface: RS-232 link from PIOU, PIOUS, RSSU, RSIS, 
or RSIU modular jack connected to a voice mail machine to provide Strata DK 
voice mail integration.
SMIS Software MIS for ACD.
SSTUFactory-installed sub-unit board that is “piggy-backed” onto the PSTU or PSTU2.
S/T InterfaceReference interface points (“S” or “T”) of an ISDN network. S/T interfaces are 
RJ-45, 8-wire connection interfaces for ISDN equipment. An NT-1 is needed to 
network U-type BRI lines to S/T type interfaces. 
TA P ITelephone Application Programming Interface.
Term Definition 
						

							Glossary
TA ~ WSIU
GL-12Strata DK Programming 5/99
TATerminal Adapter or ISDN modem that converts PC and other types of protocol into 
a signal that works with ISDN. Generally, TAs support RJ-11 voice ports and RS-
232C or V.35 or V.449 data interfaces.
T1/DS-1 See RDTU.
TCIU1Caller ID—An optional PCB that provides the Caller ID option in the Strata 
DK424.
TCIU2Caller ID—An optional PCB that provides the Caller ID option in the Strata DK40i.
TCOUFour-Circuit Loop Start CO Line Board— An optional PCB providing four loop 
start CO line circuits in the Strata DK40i.
TDDUFour-Circuit DID Line Digital Telephone Interface Unit— An optional PCB 
providing four DID line circuits in the Strata DK40i.
TETerminal Equipment. This refers to devices using ISDN service (telephones, faxes, 
computers, etc.). TE1 supports ISDN formats with S/T or U-type intefaces.
TSPITelephony Service Provider Interface.
TSIURS-232 Ports—An optional PCB that provides up to two RS-232 interface ports 
(modular jacks) enabling the DK40i to connect to various hardware devices.
TTYFlexible RS-232 port which can be used for maintenance SMDI and MIS (ACD).
U InterfaceA single twisted pair of copper wire on an RJ-11 jack. The wiring is identical to 
POTS, with different signaling. Only one U-interface device can be attached per 
line.
Universal slotSlots in a telephone KSU/cabinet that are used for a variety of optional PCBs.
WSIUSerial Interface Board (DK14)—Provides two serial ports for either a Station 
Message Detail Recording (SMDR) device or a maintenance terminal or modem, or 
Caller ID interface.
Term Definition