NEC Xen Alpha Features And Specifications Manual

							Features & Specifications Manual – Appendix B Page - 245
A6-506000-642-02
Xen AlphaRelease 1.0
Appendix - B
TONE PATTERNSThis chart provides the frequency and tone cycle patterns for the tones. Tones are used by the
system to inform users of system functions such as dial tone, busy tone and ringback tone. Note
that the tones and frequencies are listed for each type of telephone the Xen Alpha system
supports. In the chart (I) beside the frequency indicates the Xen Alpha telephone and (E)
indicates the DTU-Type telephones.   
Table B-1:  Tone Patterns 
System Tone
(Fixed)Frequency (Hz)
(Fixed)ModulationCycle
Automatic Callback 500 Hz (I)
540 Hz (D)N/A
Barge-In Tone 440 Hz N/A
Busy Tone 480 Hz
620 HzN/A
Call Waiting Tone 440 Hz N/A
CO/PBX Ring
Tone AHigh:
1024 Hz/1285 Hz (I)
1100 Hz/1400 Hz (E)
Low:
480 Hz/606 Hz (I)
520 Hz/660 Hz (E)16
CO/PBX Ring
Tone BHigh:
1024 Hz/1285 Hz (I)
1100 Hz/1400 Hz (E)
Low:
480 Hz/606 Hz (I)
520 Hz/660 Hz (E)16
CO/PBX Ring
Tone CHigh:
1024 Hz/1285 Hz (I)
1100 Hz/1400 Hz (E)
Low:
480 Hz/606 Hz (I)
520 Hz/660 Hz (E)16
CO/PBX Ring
Tone DHigh:
1024 Hz/1285 Hz (I)
1100 Hz/1400 Hz (E)
Low:
480 Hz/606 Hz (I)
520 Hz/660 Hz (E)16ON
OFF0.5 sec.
0.5 sec.
ON
OFF1 sec.
ON
OFF0.5 sec.
0.5 sec.
ON
OFF0.5 sec.
0.5 sec.
ON
OFF2 sec.
4 sec.
.375 sec.ON
OFF
.250 sec.
ON
OFF.250 sec.
.125 sec.
ON
OFF0.5 sec.
0.5 sec. 
						

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Doorphone
1Chime 
ToneN/A N/A
Busy 
Chime 
Tone1400 Hz/1100 Hz 
(I & E)N/A
Doorphone
2Chime 
ToneN/A N/A
Busy 
Chime 
Tone1024 Hz (I)
1100 Hz (E)N/A
Hold Alarm 1024 Hz (I)
1100 Hz (E)N/A
Howler Tone 2400 Hz 
(I & E)16 100% AM
Incoming Dial Tone 360 Hz/440 Hz 
(I & E)N/A
Incoming Ring Transfer 480 Hz/606 Hz (I)
520 Hz/660 Hz (E)16
Internal Ring Tone 500 Hz (I)
540 Hz (E)N/A
Key Tone 1100 Hz (I & E) N/A
Recall Tone 1024 Hz (I & E) N/A
Reorder Tone 480/620 Hz N/A
System Tone
(Fixed)Frequency (Hz)
(Fixed)ModulationCycle
ON
OFF
1400 Hz
ON
OFF
1100 Hz
ON
OFF
ON
OFF.250 sec.
.250 sec.
ON
OFF0.5 sec.
0.5 sec.
.032 sec.ON
OFF
.032 sec.
Continuous
ON
OFF
ON
OFF0.5 sec.
0.5 sec.
ON
OFF0.5 sec.
0.5 sec.
ON
OFF.070 sec.
ON
OFF0.5 sec.
0.5 sec.
ON
OFF.250 sec.
.250 sec. 
						

							Features & Specifications Manual – Appendix B Page  - 247A6-506000-642-02
Ringback Tone for 
External Speaker CO/
PBX Ring Tone440 Hz/480 Hz
(I & E)N/A
Ringing Transfer Alarm 1024 Hz (I)
1100 Hz (E)N/A
Set Tone 1 800 Hz
(I & E)N/A
Set Tone 2 500 Hz (I)
540 (E)N/A
Timed Alarm 1024 Hz (I)
1100 Hz (E)N/A
Tone Override 500 Hz (I)
540 HZ (E)N/A
Trunk Queuing 500 Hz (I)
540 HZ (E)N/A
System Tone
(Fixed)Frequency (Hz)
(Fixed)ModulationCycle
ON
OFF1 sec.
2 sec.
ON
OFF0.5 sec.
0.5 sec.
ON
OFF.700 sec.
ON
OFF0.5 sec.
ON
OFF.250 sec.
.125 sec.
ON
OFF2 sec.
ON
OFF0.5 sec.
0.5 sec. 
						

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							Features & Specifications Manual – Appendix C Page - 249
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Xen AlphaRelease 1.0
Appendix - C
GLOSSARY OF
TERMS
This glossary is provided to help you understand terms and abbreviations used throughout
this document. 
   
Table C-1:  Glossary of Terms
Te r mDefinition
Central Office (CO)Telephone company facility where subscribers lines are joined to 
switching equipment for connecting other subscribers to each other, 
locally and long distance. Also called CO, as in See-Oh. Sometimes the 
term central office is the same as the overseas term public exchange. 
Sometimes, it means a wire center in which there might be several 
switching exchanges.  
CORefer to Central Office
Dial Pulse (DP)A means of signaling consisting of regular momentary interruptions of a 
direct or alternating current at the sending end in which the number of 
interruptions corresponds to the value of the digit or character. In short, 
the old style of rotary dialing. Dial the number five and you will hear five 
clicks.   See also DTMF.  
Dual Tone 
Multifrequency 
(DTMF)Dual Tone Multi-Frequency. A fancy term describing push button or 
Touchtone dialing. (Touchtone is a not registered trademark of AT&T, 
though until 1984 it was.) In DTMF, when you touch a button on a push 
button pad, it makes a tone, actually a combination of two tones, one high 
frequency and one low frequency. Thus the name Dual Tone Multi 
Frequency.  In U.S. telephony, there are actually two types of tone 
signaling, one used on normal business or home push button/touchtone 
phones, and one used for signaling within the telephone network itself.  
See also Dial Pulse.
DPRefer to Dial Pulse.
DTMFRefer to Dual Tone Multifrequency.
Hybrid SystemThis  term is used to describe a system which has attributes of both Key 
Telephone Systems and PBXs. The distinguishing feature is that a hybrid 
key system can use normal single line phones in addition to the normal 
electronic key phones.  A single line phone behind a hybrid works very 
much like a single line phone behind a PBX. The second distinguishing 
feature of a hybrid is that it is non-squared.  This means that not every 
trunk appears as a button on every phone in the system.  In a non-
squared system, you can have more trunks than you have buttons on 
each telephone. Some telephones will have trunks that others do not 
have and vice versa. This allow you to have more trunks on your 
telephone system than you have buttons on your telephones. This 
means, for example, that four executives can each have private lines and 
access to four trunks on a six-button telephone. 
						

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ISDNIntegrated Services Digital Network. ISDN comes today in two basic 
flavors -- BRI, which is 144,000 bits per second and designed for the 
desktop, and PRI which is 1,544,000 bits per second and designed for 
telephone switches, computer telephony and voice processing systems. 
Neither ISDN BRI or ISDN PRI is a standard service, though there are 
several standard configurations. ISDN BRI is a wonderful service in 
your home or office because it can give you video conferencing, and 
ultrafaster data communications. 
Key Function (KF)Refer to Squared System
Key Service Unit 
(KSU)The Key Service Unit is the main cabinet containing all the equipment, 
switching and electronics necessary to run a key telephone system. 
KFRefer to Squared System
KSURefer to Key Service Unit.
LCDRefer to Liquid Crystal Display
Liquid Crystal Display 
(LCD)Liquid Crystal Display. An alphanumeric display using liquid crystal 
sealed between two pieces of glass. The display is divided into hundreds 
or thousands of individual dots, which are charged or not charged, 
reflecting or not reflecting external light to form characters, letters and 
numbers. LCD displays have certain advantages. They use little 
electricity and react reasonably quickly.
MFRefer to Hybrid System.
Multifunction System 
(MF)Refer to Hybrid System.
PBRPush Button Receiver.  Instead of rotary dialing, buttons are pushed to 
generate the tones needed to place a phone call. Also called Touchtone 
or DTMF. 
Rotary DialingRefer to Dial Pulse
PBXPrivate Branch eXchange. A private (i.e. you, as against the phone 
company owns it), branch (meaning it is a small phone company central 
office), exchange (a central office was originally called a public exchange, 
or simply an exchange). In other words, a PBX is a small version of the 
phone companys larger central switching office. A PBX is also called a 
Private Automatic Branch Exchange, though that has now become an 
obsolete term. In the very old days, you called the operator to make an 
external call, except in Europe. Then later someone made a phone 
system that you simply dialed nine (or another digit -- in Europe its often 
zero), got a second dial tone and dialed some more digits to dial out, 
locally or long distance. So, the early name of Private Branch Exchange 
(which needed an operator) became Private AUTOMATIC Branch 
Exchange (which didnt need an operator). Now, all PBXs are automatic. 
And now theyre all called PBXs, except overseas where they still have 
PBXs that are not automatic
Squared SystemA squared system is a system where each trunk line  appears as the 
same button on each phone. The major advanced of the squared system 
is that you can go to any telephone anywhere in the system and punch 
any button for any trunk line and know it to be the same button for the 
same trunk line. This makes telephone operation less confusing.  
However, there is a limitation to this configuration, you can only have as 
many trunks on your key system as you have trunk buttons on your key 
telephones.   (See also, Hybrid System.)Table C-1:  Glossary of Terms
Te r mDefinition 
						

							Features & Specifications Manual – Appendix C Page  - 251A6-506000-642-02
SwitchA mechanical, electrical or electronic device which opens or closes 
circuits, completes or breaks an electrical path, or selects paths or 
circuits.  
Tenant ServiceSome businesses acquire a telephone system too large for their needs so 
they sell parts of the service to smaller offices in their own building or in 
the surrounding community. There are two ways to make money on 
tenant service -- renting telephone equipment or reselling long distance 
lines. Theres more money on re-selling long distance lines. 
Touchtone DialingRefer to Dual Tone Multifrequency.
Trunk LineA communication line between two switching systems. The term 
switching systems typically includes equipment in a central office (the 
telephone company) and PBXs. A tie trunk connects PBXs. Central office 
trunks connect a PBX to the switching system at the central office.  Table C-1:  Glossary of Terms
Te r mDefinition 
						

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