Toshiba Strata Dk14, Dk40i, Dk424 General Description Manual

							Features
System Features
Strata DK General Description    5/9987
Table 31 Standard and Optional System Features
Standard System Feature
Abandoned Call Numbers (ABR)
Account Codes (forced/voluntary/verified)
Alternate Point Answer
Automatic Release from Hold/DISA
Background Music Interface
1
Centrex/PBX Compatible
Centrex Ringing Repeat
Conferencing
Credit Card Calling
Day/Night Modes
Delayed Ringing
Distinctive CO Line/Directory Number Ringing
Distributed Hunt (DK424 only)
DTMF Back Tone
DTMF and Dial Pulse CO Line Compatible
DTMF Signal Time (80/160 ms)
Flexible Button Assignment
Flexible Directory Numbers
Flexible Line Ringing Assignment:
©Immediate
©Delay 1
©Delay 2
Flexible Port/line Assignment
Group Paging
Least Cost Routing
Line Groups
Line Queuing
Live System Programming
Memory Protection
Message Waiting
1
1.Some feature implementation may require additional auxiliary equipment.Multiple Directory Numbers
Multiple FCC Registration
Music-on-Hold (MOH) Interface
Night Ringing Answer Code
Non-blocking Talk Paths
Outgoing Call Restriction
Pooled CO Line Buttons
Pooled CO Release/Answer Button
Privacy/Non-privacy
Station Hunting
Station Speed Dial
Station Relocation
System Programming through Station
System Speed Dial
Tandem CO Line Connections
Tenant Service
Toll Restriction
Toll Restriction Override by System Speed Dial
Transfer Recall (CO line and Tie line)
Traveling Class of Service
Unlimited Handsfree Directory Number Talk Paths
Unrestricted Call Transfer to Directory Numbers
Voice First or Tone Signaling
Voice Mail Integration:
©ANI/DNIS Routing to Voice Mail Box
©Automated Attendant
©Call Forward to Voice Mailbox
©Feature Integration
©Message Waiting Indication
Voice Mail Control via Station
Optional Features
Alarm Sensor
1
Alternate Background Music1
Amplified Conference Interface1
Automatic Call Distribution (ACD)1
Automatic Number Identification (ANI)
Built-in Auto Attendant1
Caller ID1
Computer Applications1
Data Switching1
Dialed Number Identification Service (DNIS)
Direct Inward Dialing (DID) Lines
Direct Inward System Access (DISA)
Door Lock Control
1
Door Phones (MDFB)
Enhanced 911 (E911) Service1
External Page Interface1
External Page Zones1
External Amplified Speaker1
Ground Start CO LinesHospitality Management Information System (HMIS)
Integrated Services Digital Network (ISDN)
Loop Start CO Lines
Modem Pooling
1
Night Ringing Over External Page1
Night Ringing Over Selected Page Zones1
Off-premises Station1
Power Failure Transfer1
Printer Sharing1
Relay Service1
©External Page/Door Lock Control Relay
©Night/Hold Relay
Remote Administration and Maintenance1
Reserve Power1
System Program Administration Software1
Station Message Detail Recording (SMDR)1
Tie Lines
Voice Mail Interface (SMDI) 
						

							Features
System Features
88Strata DK General Description    5/99
Table 32 System Feature Capacities
DK424
FeaturesDK14DK40iRCTUARCTUBA/
BBRCTUC/DRCTUE/F
Amplified Conferencing1
1. Requires additional customer-supplied hardware.024444
Auto Attendant (built-in) simultaneous calls in 
queue3 5 12 12 24 24
Caller ID/ANI/CNIS Abandoned Call Numbers:
      stored per station10~100 10~100 10~100 10~100 10~100 10~100
      stored per system 200 200 200 400 1000 2000
CO Line Groups 4 8 8 8 16 16
Distributed Hunt (DH) Calls in Queue per Groups 10 10 10 10 10 10
DH Groups 16 16 16 16 16 16
DH stations per Group 8 28 32 32 32 32
DNIS Network Routing Numbers 0 100 100 200 300 300
DNIS Numbers 0 200 200 350 500 500
DTMF receivers 3512122424
External Page Zones 0 4 4 4 4 8
Call Park Orbits - general 20 20 20 20 20 20
Call Park Orbits - individual 10 28 32 80 240 336
Personal LCD Messages per DKT
2
2. Personal Messages includes: timed reminder memo and station speed dial memo.10 10 10 10 10 10
Personal Message DKTs 8 16 16 32 96 96
[PhDNs] per System 10 28 32 80 240 336
[PDNs] per System 10 28 32 80 240 336
Ring Tones 3 3 3 3 3 3
Simultaneous Party Conferencing (4-party) 2 3 3 7 7 14
Simultaneous Two-CO Line conferencing 
(3-party)24 4 101020
Station Speed Dial 40 40 40 40 40 40
Stratagy DK Systems (per tenant group) 1 1 1 1 1 1
Stratagy DK Systems (per system) 0 2 2 2 4 4
System LCD Messages 40 40 40 40 40 40
System Speed Dial 40 40 40 100 100 800
Telephone Page Groups 5 5 5 5 9 9
Telephone Group Page – simultaneous stations 
paged82832 80 120120
Telephone Pickup Groups 8 20 20 20 20 20
Tenants 2 2 2 4 4 4
Toll Restriction (AC/OC) Table 8 8 8 8 16 16
Toll Restriction Classes 4 4 4 4 8 8
Verified Account Codes 300 300 300 300 300 500
Voice Mail SMDI Yes Yes Yes Yes Yes Yes 
						

							Features
System Features
Strata DK General Description    5/9989
Table 33 Line Capacities and Universal Printed Circuit Board Slots
DK424
Lines and PCB SlotsDK14DK40iRCTUARCTUBA/BBRCTUC/DRCTUE/F
Universal slots 0   41
1. There are four universal slots in the DK40i expansion unit.6123654
CO lines – loop start4 12 
216 2
2. All CO line capacities assume a PIOU, PIOUS, PEPU, RSSU, or RSIU is installed for RCTUBA/BB, RCTUC/D or 
RCTUE/F, but no Caller ID RCIU2/RCIS PCBs.48 
2144 2200 2
CO lines – ground start0 12 16 240 2136 2200 2
DID lines (analog)0 12 16 3
3. Limits apply to analog DID and Tie lines, not T1 DID/Tie lines.40 
3136 3200 3
Tie lines (analog)0 12 16 340 3136 3200 3
T1 (DS-1) lines each)00 0 48 4
4. T1 lines can be loop start, ground start, Tie, or DID (maximum 24 lines per unit, any type or combination).144 
4192 4
ISDN BRI B channel lines0128 5
5. BRI lines provide CO line services, including Caller ID, DID and Direct Inward Lines (DIL).16 
516 516 5
ISDN PRI B channel lines000 47 6
6. PRI lines provide CO line services, including Calling Party Number, DID, Tie, POTS, FX and DIL.141 
6188 6
Squared System Maximum
(lines + stations)4 lines +
4 stations12 lines +
12 stations16 lines + 
16 stations48 lines + 
48 stations144 lines + 
144 stations200 lines + 
200 stations
Table 34 Station and Peripherals Capacities
DK424
StationsDK14DK40iRCTUARCTUBA/BBRCTUC/DRCTUE/F
Add-on modules (DADM) 8 12 12 40 120 200
Attendant consoles 0 0 0 2 4 4
DKT2004-CT Cordless Telephones 8 28 32 80 240 336
DKT2004-CT simultaneous calls 8 9 9 9 9 9
Door locks 2 3 4 5 5 5
Door phones 6 9 9 12 12 12
DSS consoles 0 3 3 4 8 8
ISDN BRI station circuits TE-1 and TA 
(2B+D per circuit)
1
1. ISDN BRI TE-1 and TA include ISDN telephones, modems, video conference interfaces, etc. Up to two stations (TE-1 and/or TA) 
can connect to and share one BRI S-type circuit. Only one station can connect to a BRI U-type circuit.0 10 8 16 40 64
Handset;OCA stations 8 28 32 80 240 336
Off-premises stations 2 20 32 80 232 328
PDIU-DS
2
2. Speaker OCA, PDIU and RPCI capacity is determined by 2B channel slot availability and power supply limits.7 24 31 79 160 208
RPCI-DI used for data + TAPI, per system 
28 24 32 80 144 200
RPCI-DI used for TAPI only: per cabinet 
2N/A N/A 32 40 40 40
   per system 28 24 32 80 186 280
Speaker OCA stations 28 28 32 80 160 208
Standard stations 2 20 24 72 232 328
Telephones – DKT 8    28 
3
3. To install the maximum of 28 total DKTs and EKTs in the DK40i, up to 16 of the stations can be EKTs and at least 8 of the stations 
must be DKTs.   32 
4
4. Maximum capacity of DKT/EKT stations per DK424 cabinet is 62, less for EKT 2000, 3000 (Power Factor limitation).   80 
4   240 4   336 4
Telephones – EKT 0    16 3   32 4   80 4   240 4   328 4 
						

							Features
Station Features
90Strata DK General Description    5/99
Station Features
This chapter describes the features that are available to Strata DK station users. For an overview, 
see “Station Features by Station Type” on Page 100. Tables 34 and 35 list the station and 
peripheral capacities and station features.
NoteNot all features for digital telephones are available on the digital cordless phones.
Account Code Button
This button, enables digital telephone users to enter Voluntary Account Codes (verified or 
nonverified), during conversations without interrupting the talk path. It can also be used to enter 
Verified Account Codes to allow normally restricted stations to dial long distance calls.
Add-on Module (DADM)
One to two DADMs can be attached to a DKT2000-series digital telephone to provide an 
additional 20 or 40 buttons (see “Digital Add-on Module (DADM)” on Page 53). DADM buttons 
can be programmed for outside line access, System or Personal Speed Dial, or Direct Station 
Selection (Appendix – Table 42 on Page 115).
Alert Signal Button
This feature enables a digital or electronic telephone user to signal a predesignated station. When 
the 
$OHUW6LJQDO button is pressed, a distinct tone signal is sent to the dedicated station. This 
signal can be used to alert someone about a pre-arranged event or action—No talk path will exist 
between the called and calling telephones.
An alert signal can be sent to telephones that are idle, or Busy, Call Forward, and/or Do Not 
Disturb mode. Each station that has this feature can send/receive the alert signal to/from the other 
station in the alerting pair. Up to four unique 
$OHU W6LJQDObuttons can be on a station.
Automatic Busy Redial (ABR)
Digital and electronic telephone users who dial a busy outside telephone number can set ABR, 
which automatically redials the number at preprogrammed intervals. Busy tone must consist of 
standard tones. The system will call back the station when it rings the number. ABR is compatible 
with LCR and ISDN, but is not compatible with outgoing DID or Tie line calls. ABR requires the 
QRCU3 on DK14 and K5RCU option PCB for the DK40i; it is standard on the DK424.
Automatic Callback (ACB)
Station users that call busy or Do Not Disturb (DND) stations can set ACB and have the system 
call them back when the busy or DND station or trunk group becomes available. When calling a 
station with multiple [PDNs] in the ring first mode, ACB will be available to the calling station 
only if all the [PDNs] of the called station are busy.
Automatic Hold
This option enables a user to place a CO /LQH or [DN] call on Hold by pressing another CO /LQH 
or [DN] button. The user can then alternate between the new and the old call by pressing the 
desired 
/LQH or [DN]. If this feature is not activated, users must press +ROG before accessing 
another line and switching between calls. 
						

							Features
Station Features
Strata DK General Description    5/9991
Automatic Line Selection
A digital or electronic telephone user with this programmable feature automatically accesses an 
outside line, a line group, and an internal [PDN] line whenever the handset is lifted or the speaker 
(
6SNU) button is pressed.
Background Music (BGM) with Station Control
Digital telephone users can control BGM playing over their telephone speakers. (Only a 
designated station can control BGM over External Page speakers.) Besides being able to turn the 
music on or off, users can also adjust the volume level. The Cordless DKT-2004-CT attached to a 
DKT is not compatible with BGM.
Busy Override
Enables a station user to send tone bursts to a busy station’s idle [DN] or CO /LQH button by 
dialing a 
 or pressing a feature button. The tone burst can either be sent two times (four seconds 
apart) or repeated continuously every four seconds. If there are no idle [DNs] or line buttons on the 
busy station, the station will receive two bursts of camp-on tone (see “Call Transfer with Camp-
on” on Page 93.)
The busy station can be a digital or electronic and receive this tone. The DKT2000-series 
telephone users can adjust their telephones to receive the tone over their handset or headset 
receiver, as well as the speaker. Standard telephones will receive camp-on tone twice from the 
handset receiver (it is not continuous on standard phones).
Busy Station Transfer/Busy Station Ringing
The Busy Station Transfer and Busy Station Ringing features operate together to ensure that a 
busy digital or electronic telephone station always receives transferred calls along with distinct 
LED and tone indications. A typical application is when an AA device transfers calls frequently to 
a busy answering position station.
Call Forwarding
Outside CO Line and internal [DN] calls to stations in the Call Forwarding mode are routed to an 
alternate station or voice mail device. Stations in this mode can originate calls as usual. Call 
forwarding can be set by a feature button or access code. 
Station users can set Call Forward for the telephone’s [PDN] or the [PhDN] that is “owned” by that 
telephone. The Call Forward destination mailbox can be different for each [PDN] or [PhDN]. LCD 
telephones display the forwarded [DN] and the “forward to” destination. 
On DK424, Release 3.2 and above, a telephone can be designated as the Call Forward controlling 
telephone in applications that require ground and loop start CO lines to ring a group of telephones. 
In DK14 or DK40i, and prior releases of DK424, CO lines that ring more than one telephone do 
not Call Forward. 
To Call Forward in a particular ringing assignment (immediate, 12-second delay, 24-second 
delay), the Call Forward control telephone must be the only one designated to ring in the ringing 
assignment. If the call forwards to voice mail, it is sent to the mailbox controlling telephone’s 
[PDN] or designated [PhDN]. There are six Call Forwarding modes:
All Calls
This mode forwards all calls to a busy or idle [DN] immediately; the station will not ring. 
						

							Features
Station Features
92Strata DK General Description    5/99
Busy
When this mode is set, all calls to a busy [DN] immediately forward. If a station has an idle [PDN], 
but is busy on another [DN] or CO line call, calls to the [PDN] will not forward if the system has 
Ring First signaling, but they will forward if the system has Voice First Signaling. If all the 
station’s [PDNs] are in use, then calls to the [PDN] will forward immediately. When a station is in 
the DND mode, all calls to the station’s [PDN] forward immediately, if the [PDN] does not appear 
on other stations.
No Answer
Calls to an idle [DN] set with this mode will ring for 8 to 60 seconds and then forward. The Ring 
No Answer time (8 to 60 seconds) can be set by the telephone user. Call Forward No Answer 
(CFNA) is optional on Handsfree Answerback.
Notes
lOCA calls will not Call Forward. 
lHandsfree internal calls can be programmed to automatically forward if there is No Answer. If 
this is not programmed, callers can force Call Forward with a one-digit entry.
Busy/No Answer
When a station is idle and in this mode, calls will ring for 8 to 60 seconds and then forward. The 
Ring No Answer time can be set by the telephone user. When all the station’s [DNs] are busy or 
when the station is in the DND mode, the call will “Call Forward-busy” immediately. 
On Ring First systems, if the station is busy on a call, but has an idle [DN], calls will mute-ring the 
idle [DN] until the CFNA timer expires and then the call will forward. This allows other users to 
answer the call if the called [DN] appears on their telephones. On Voice First systems, calls will 
immediately Call Forward-busy when the station is busy on a call, even if it has an idle [PDN]. A 
station in the DND mode will call forward immediately.
Fixed
Calls to the [PDN] or private CO line of an idle or busy digital or electronic telephone in this mode 
will forward immediately to a destination assigned in system programming, but not as defined by 
the telephone user.
External Call
Users can set their stations to forward incoming calls (on private or DID lines) to numbers outside 
the DK System. The forwarding destination can be cancelled or changed to another outside 
number or an internal voice mailbox (either remotely via DISA or from the user’s telephone, 
security code protected). Internal, Tie line, and transferred calls will not call forward externally, 
but can forward internally if another Call Forward mode is set simultaneously with Call Forward-
external.
NoteCall Forwarding can be set for [PDNs] and [PhDNs] individually, with the exception of 
Call Forward External and fixed Call Forward which applies only to [PDNs].
Call Park Orbits
The Call Park feature enables a station user to place a call temporarily in an orbit so that the call 
can be retrieved by any user, either from the same station or from a different station. There are 20 
General Park Orbits for the system and one Personal Park Orbit for each station. Personal Park 
Orbits are available to any type of telephone, including standard telephones.
If a call is parked, but not retrieved within a preprogrammed time period, it will recall the parking 
telephone. The Park recall time is set individually for each station. 
						

							Features
Station Features
Strata DK General Description    5/9993
Park and Page
This feature enables a user to park a call (in a General or Personal Park Orbit), enter a Page Zone 
or Group access code, and then announce the orbit number of the waiting call to the Paged party. A 
pre-programmed flexible button can be assigned to telephones to automatically connect to a 
predesignated External Paging circuit, a Telephone Paging group or both. 
Auto Park
This feature is only available to LCD telephones. When a telephone user parks a call, the user can 
enter 
 instead of a specific Orbit Number. The system will then automatically select the next 
available General Park Orbit and park the call. The parking telephone’s LCD will show the Park 
Orbit that has been automatically selected for the parked call. 
Call Pickup
By pressing a button or by going off-hook and dialing an access code, any station can pick up the 
following type of calls:
©[PDN] or [PhDN] calls on hold or ringing at other stations 
©CO/DID/Tie lines calls ringing at other stations, either all lines or designated lines. (See 
“Tenant Service” on Page 84.)
©External or Station Group Page
©CO line ringing during the Night mode over External Page or night bell
©Door phone calls
©Incoming CO line calls
©Parked calls
©Any ringing line or designated Tenant Group lines
©Tandem CO line connections (by tandem origination telephone)
Call Pickup Groups
Up to 20 Call Pickup groups can be created to enable station users to pickup calls ringing at other 
stations with the touch of a Pickup feature button or by dialing brief access codes. 
Station users can pick up a call that is ringing or transferred to any station in their own group with 
a single access code or feature button, and can pickup calls ringing stations in other groups with 
selected codes. Any station can be in all the different pickup groups.
Call Transfer with Camp-on
A station user can transfer a CO, DID, or Tie line or internal call to a busy station, which will 
receive an alert tone indicating that a call is camped-on. If the busy station fails to answer, the 
camped-on call will recall the transferring station.
A camp-on tone is also sent to electronic or digital telephones that are busy and that do not have an 
idle [DN] or 
/LQH button to receive the call. Camp-on tone consists of two tone bursts, followed 
by silence. It can be enabled or disabled for each individual station.
Call Transfer Immediate
For Digital LCD telephones: If the Feature Prompting Soft Key is used to transfer a call, the call 
immediately transfers after the last digit of the destination is dialed. If the called station is not 
available or is busy, the call automatically camps-on to it. This feature is helpful to people who 
process a large number of calls with no time to wait for transferred calls to be answered. 
						

							Features
Station Features
94Strata DK General Description    5/99
Call Transfer Music or Ringing Option
This feature enables ringing or music to be heard by the caller when a call is transferred, 
depending on system programming. Prior to Release 3.2, callers heard music during the transfer 
process and no ringing option in programming was available.
Call Transfer Recall
CO, DID, or Tie lines that are transferred (internally or over Tie lines) will recall to the transferring 
station if the called station does not answer. The recall time is individually set for each transferring 
station.
Centrex/PBX Features
System Speed Dial buttons can be programmed with access codes, plus any flashes or pauses 
necessary to access features through a host switching system.
Conferencing
A variety of Conferencing combinations are available to all station users, as listed below. Stations 
and lines can be added in any order. (See “Amplified Conference Interface” on Page 62 for more 
information.)
©One or two stations and two outside lines
©Two or three stations and one outside line
©Four stations on one internal [DN] line
©Three to four simultaneous Conference calls (Table 32 on Page 88).
©Voice Mail plus one station and two other parties (internal or outside line for DK424, Release 
3.2 and above. (Outside line must be analog, not digital.)
Continuous Dual-tone Multi-frequency (DTMF) Tone
The DTMF dial signal sent to an outside line or voice mail/auto attendant device can continue as 
long a DKT2000-series digital telephone user presses a button on the dial pad. This feature is not 
available with electronic or DKT1000-series digital telephones.
Data Call Button
A flexible button on a digital telephone can be assigned as a DWD&DOO button, which can be used 
to dial internal data calls. The telephone must be equipped with an RPCI-DI for 
DWD&DOO button 
applications.
Direct Station Selection (DSS) Buttons
Digital telephone users can ring selected stations by pressing a flexible feature button assigned for 
a DSS function. The LED associated with the button provides the busy status of the station and the 
station’s [PDN]. Each flexible button can be assigned as a DSS button to a different station [PDN]. 
DSS buttons can also be assigned on DADMs.
Direct Station Selection (DSS) Console Features
On DK40i and DK424, digital and electronic telephones can operate with DSS consoles, which 
offer the following features:
©Automatic CO line Hold 
						

							Features
Station Features
Strata DK General Description    5/9995
©Feature buttons
©All Call Voice Page
©Outside Line access buttons
©DSS with busy LED indication
©Night Transfer
©Speed Dial
©Voice First or Tone Signaling
©Call Forward Override
Directory Number [DN] Buttons
These are the telephone’s call buttons, used to originate and receive internal and external calls. See 
“Multiple Directory Numbers” on Page 76 for information on the different types of [DNs].
DISA Security Code Revision
Certain digital telephones selected in programming can revise the DISA security code.
Distinctive LED Color and Flash Indications
©Outside CO /LQH and [DN] button LEDs light red or green to help digital telephone users 
determine the status of calls. Electronic telephone LEDs are always red when they light.
©Digital and electronic telephone LEDs flash at varying rates to indicate calling status.
Distinctive Station Ringing
Digital and electronic telephones can have one of three different ring tones for incoming CO and 
DID line calls to help distinguish incoming calls. Also, ring tones for transferred CO and DID line 
calls are different from the ring tones of direct CO line calls to the same telephone.
Do Not Disturb (DND)
Station users with digital telephones can activate DND to prevent any calls from ringing them. 
Callers will hear a fast busy tone. If a DND station’s [DN] appears on other telephones, callers will 
ring the [DNs] on those other telephones. The [DN] will then flash on the DND station, but it will 
not ring. Stations in DND mode can originate calls. Also, Call Forward-Busy will operate on a 
DND telephone, even if the telephone has idle [DNs].
Do Not Disturb (DND) Override
Stations with this special feature programmed can override stations in the DND mode with a tone 
that indicates that somebody is trying to contact them.
DP/DTMF Mode Change
This feature allows digital and electronic telephone users to change the line out-dialing signal 
mode from Dial Pulse (DP) to DTMF with the touch of a feature button.
Exclusive Hold
Exclusive Hold enables a digital telephone user to place a call on hold so that the call can only be 
picked up at that station or at another station using Directed Call Pickup. No other station can pick 
up the call by simply pressing the [DN] or line button that the call is being held on.  
						

							Features
Station Features
96Strata DK General Description    5/99
Executive Override
Stations with this feature programmed can enter any conversation, except ACD and ACD/PBX 
calls, in the system by dialing an access code or pressing a Feature Prompting Soft Key. An 
optional warning tone notifies the parties that another party is about to conference into their 
conversation. Executive Override can be blocked selectively to any station in system programming 
for security with modem (data) calls, voice mail calls, fax machine calls, etc.
Feature Prompting with Soft Keys
As an alternative to dialing access codes and using feature buttons, station users with LCD digital 
telephones use Soft Keys (shown on their LCD) to access features. Abbreviated feature names 
appear during a call (when the telephone is in the ring or talk state) on the LCD above fixed keys. 
Users can select a feature by pressing the associated key. The LCD feature selections change 
according to the call state to provide the most logical options.
Flash Button
An optional button on a digital or electronic telephone can be used either to disconnect a line and 
regain CO dial tone, or to gain access to Centrex features. The timing choice is system-wide by 
system programming.
Handsfree Answerback
When a voice-announced internal [DN] call comes in to a digital or electronic telephone, users can 
answer without lifting the handset. The Cordless DKT-2004-CT and standard telephones are not 
compatible with this feature.
Hearing Aid Compatible
All Toshiba digital telephones are hearing aid compatible.
Liquid Crystal Display (LCD) Features
LCD model telephones provide a number of features, such as: ANI, Caller ID, CO Line 
Identification, DNIS, and more. See Table 26 on Page 50 for a list of LCD features.
Microphone Cut-off Button
Digital telephones can be programmed with a Microphone Cut-off (0LFURSKQ &XWRII) button to 
turn the microphone inside the telephone on and off while idle. This “push-on/push-off” button 
enables/disables Handsfree Answerback to the telephone. When Microphone Cut-off is on, it 
blocks room monitoring and Hands-free Answerback.
Modem Button
This button enables a digital telephone user to reserve a modem from a pool or to switch from a 
voice to a data call. Its LED indicates the availability of modems. The telephone must be equipped 
with an Integrated PC Interface Unit (RPCI) for 
0RGHP button applications.
Modular Handset and Line Cords
All Toshiba telephones are equipped with modular handset and line cords.