Inter-Tel GMX-48 INSTALLATION & MAINTENANCE Manual

							‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE FEATURES 
Issue 2, May 1990 
G. DIRECT INWARD SYSTEM ACCESS (DISA) 
NOTE: 
This feature is available only in the Advanced 
software package and requires an ARM. 
4.41 DISAis a programmable feature that allows an 
outside party to dial into the system from an external 
DTMF telephone and then access the following sys- 
tern resources: intercom numbers for placing calls to 
stations; line groups or auto lines for placing outgoing 
calls; and hunt group pilot numbers. 
4.42 Toll restriction is not checked on DISA calls 
when an outgoing line is accessed. DISA users cannot 
use ARS, access individual C.O. lines, or make pages. 
Even when privacy release is enabled system wide, 
keyset users may not access ongoing DISA-to-inter- 
corn calls by pressing the busy line key. 
4.43 Any of the equipped lines can be programmed 
to receive incoming DISA calls in day and/or night 
mode. When not in use for DISA, the line can be used 
by system users for placing outgoing calls (unless the 
line is designated as “incoming-only”). Stations can- 
not be programmed for ring-m or answer assignments 
for DISA lines. 
NOTE: Due to the natural characteristics of a C.O. 
line, the volume level of DTMF tones transmitted 
over the line may be substantially reduced before 
reaching the GMX-48 System. This natural 
degradation in tone volume may adversely affect the 
reliability of the DISA feature. Other factors which 
can affect DISAperformance are C.O. line noise and 
the quality and strength of the DTMF tones gener- 
ated by the off-premises phone itself. 
4.44 When a DISA user calls a station intercom 
number, the call rings as a direct ring-in call. The 
DISA caller hears music (if enabled) until the call is 
answered or disconnected, even if the called station is 
busy or in do-not-disturb. If the called station is for- 
warded, the call follows the programmed forward. 
4.45 When a DISA caller accesses an outside line, 
the unsupervised CO timer is activated. When the 
timer expires, both parties hear a burst of dial tone. 
Either party may reset the timer by pressing any 
DTMF key. If the timer is not reset, the call recalls 
the attendant. If the attendant does not answer the recall before the recall and abandoned recall timers 
expire, the call is disconnected. NOTE: There may be some reduction in voice volume 
when a DISA caller accesses an outside line. 
4.44 When a hunt group pilot number receives a 
call through DISA, the call rings or circulates accord- 
ing to how the hunt group is programmed (i.e., linear, 
distributed, or all ring). The call is displayed as a 
direct ring-in call. Refer to page 4-17 for more infor- 
mation on hunt group calls. 
DISA Do-Not-Disturb Breakthrough 
4.47 Under normal circumstances, direct ring-in 
calls are not blocked by do-not-disturb. However, the 
database contains an option that allows or disallows 
do-not-disturb breakthrough on a station-by-station 
basis. If do-not-disturb breakthrough is disallowed, 
DISA calls to a station in do-not-disturb are immedi- 
ately sent to the station’s attendant. If the attendant 
does not answer the call, it is disconne*cted after the 
abandoned recall timer expires. 
Security Codes 
4.48 DISA lines can be assigned four-digit security 
codes that are required to access intercom numbers 
and/or the C.O. lines. The installer can program sep- 
arate codes for each DISA line to be used during day 
and/or night modes. 
NOTE: While DISA is designed to be reasonably se- 
cure against misuse by outside callers, there is no im- 
plied warranty that it is invulnerable to unauthorized 
intrusions. The installer and owner of the system 
should ensure that proper security measures have 
been taken to prevent outside callers from accessing 
and misusing outgoing lines for unauthorized calls. 
Using DISA 
4.49 Incoming DISA calls are not answered unless 
the necessary resources (a DTMF decoder and a 
voice channel) are available. 
4.50 If you hear a busy signal followed by music, the 
C.O. line you tried to access is busy. You have camped 
on and will be connected to the desired line as soon as 
it is available. 
4.51 If you call an intercom number, you will hear 
music until the appropriate transfer timer expires; 
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							FEATURES 
Issue 2, May 1990 
‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
then if your call is not answered it recalls the called 
station’s attendant. 
4.52 If you enter an invalid feature code, or inter- 
com number, or dialed an invalid number, you hear 
reorder tones and then three tones (followed by 
silence). You may try again. If you dial a valid hunt 
group pilot number that has no members assigned to 
it, the call automatically rings at the primary atten- 
dant station (or the system alarm station) until the ap- 
propriate transfer and abandoned recall timers ex- 
pire. If the attendant does not answer before the 
abandoned recall timer expires, the call is discon- 
nected. 
If you enter an invalid security code, you hear 
reorder tones and the call is disconnected. 
4.53 
TO USE DISA IF A SECURITY CODE IS NOT RE- 
QUIRED: 
(1) From a DTMF telephone, dial the telephone 
number of the DISA line. 
(2) When the call is answered by the system and 
you hear three tones, do one of the following: 
a. 
For placing an outside call: Dial the auto- 
matic line select (89) or select line group 
(81-87, or 9) feature code. You then hear 
outside dial tone and can place your call. 
b. 
For placing an intercom call: Dial an inter- 
com number or a hunt group pilot number 
(if calling the attendant, dial the intercom 
number, not “Cl”). You hear music until the 
call is answered. 
4.54 
TO USE DISA IF A SECURITY CODE IS REQUIRED 
FOR INTERCOM AND C.O. LINE ACCESS: 
(1) From a DTMF telephone, dial the number of 
the DISA line. (2) When the call is answered by the system and 
you hear a single progress tone, enter. the ap- 
propriate (day or night) DISA security code. (If 
an invalid security code is entered, you hear re- 
order tones; the call is dropped.) 
(3) When you hear three tones, do one of the fol- 
lowing: 
a. 
b. 
For placing an outside call: Dial the auto- 
matic line select (89) or select line group 
(81-87, or 9) feature code. You hear out- 
side dial tone; place your call. 
For placing an intercom call: Dial an inter- 
com number or hunt group pilot number. 
(If calling the attendant, dial the intercom 
number, not “O”.) You hear music until the 
call is answered. 
4.55 TO USE DISA IF A SECURITY CODE IS REQUIRED 
FOR C.O. LINE ACCESS: 1 
(1) From a DTMF telephone, dial the telephone 
number of the DISA line. 
(2) When the system answers the call and you 
hear three tones, do one of the following: 
EITHER, dial an intercom number or hunt 
group pilot number (if calling the attendant, 
dial the intercom number, not “0”). You hear 
music until the call is answered. 
OR, dial a C.O. access code (89, 81-87, or 9). 
When you hear a single progress tone, enter 
the appropriate (day or night) DISA security 
code. You hear outside dial tone when the sys- 
tem recognizes the security code and if the line 
is available. 
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INTER-TEL PRACTICES FEATURES 
GMX-48 INSTALLATION & MAINTENANCE Issue 2, May 1990 
H. C.O. LINE MAINTENANCE 
4.56 
Attendants can place individual lines out of 
service by entering a feature code. This unequips the 
line, but does not prevent the central office from 
sending signals on the line. To outside callers, the line 
will appear to be functioning and they will hear ring- 
ing. However, station users will not hear ringing or 
see a flashing line key and cannot access the line for 
receiving or placing calls until the attendant places 
the line back into service by entering another feature 
code or the line is returned to service through the 
database. 
NOTE: If the line that is placed out of service is part 
of a telco rotary hunt, the central office will-detect 
that line as being available and will not bypass it for 
incoming calls. 
4.57 The advantage of using this feature is that in- 
stead of unequipping the line in the database, all pro- 
gramming for the line is preserved. The line returns 
to complete functionality as soon as it is returned to 
service, with no additional programming required. 
Note that because the line is temporarily un- 
equipped, no programming changes can be made for 
that line until it is returned to service. 
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							FEATURES 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
5. STATION INSTRUMENTS 
5.1 To allow system flexibility and cost efficiency, a 
variety of station instruments can be used on the 
GMX-48 System. They are: be used for receiving handsfree intercom calls, but 
the user must lift the handset to speak when piacing 
intercom calls and when placing or receiving outside 
calls. The MUTE key is always lit when the speaker is 
activated. Call monitoring and on-hook dialing are 
not affected. 
l 24-Line Keysets - display and standard 
l 1ZLine Keysets - standard only 
0 Single-Line Sets - Single-Line Instruments 
(SLIs) and industry-standard, single-line DTMF 
sets Optional Liquid Crystal Display (LCD) 
l Direct Station Selection/Busy Lamp Field (DSS/ 
BLF) Units 
5.2 Station instrument configuration depends on 
the combination of Expansion Modules and Acces- 
sory Port Modules installed. Expansion Modules can 
be used to add up to eight keysets or DSS/BLF Units 
each, and Accessory Port Modules can be used to add 
up to six single-line devices each. There can be as 
many as 48 keysets (with no single-line devices), or up 
to 12 single-line devices (with 32 keysets). 
5.7 Standard keysets can be converted to display 
keysets by installing LCD Units. Installation instruc- 
tions are on page 3-38 in the INSTALLATION sec- 
tion. The LCD Unit has two 16-character display 
lines. When the keyset is not in use, the LCD shows 
the date and the time of day (and, if enabled, the sta- 
tion intercom number and user name). Other displays 
include: reminder messages, do-not-disturb mes- 
sages, numbers dialed, call sources, elapsed time of 
calls, current call costs, error messages, station sta- 
tus, programming messages, etc. The displayed infor- 
mation is described throughout the instructions in 
this section of the manual. 
Keyset Identification Displayed 
A. KEYSETS 
5.3 
Keysets are available in standard or display 
models. The only physical difference is a liquid crystal 
display (LCD) on the display keyset. Keyset design 
features are described in the following paragraphs. 
Handsfree Speakerphone 
5.4 
Each keyset has a built-in, integrated speaker- 
phone that allows handsfree operation on outside 
(C.O.) calls and inside (intercom) calls. 
5.8 When a display keyset is idle, the intercom num- 
ber and assigned user name appear on the top line of 
the display, and the date and time appear on the bot- 
tom line. Through database programming, installers 
can program the system to show date and time only 
(see PROGRAMMING, page 5-49), unless the user 
presses the SPCL key and enters the display date and 
time feature code (300). 
Date, Time, User Name, And Intercom Number 
Display 
NOTE: 
On certain handsfree-to-handsfree intercom 
calls, voice volume levels may cause feedback to oc- 
cur. If this happens, one station user should pick up 
the handset. 
5.5 All keyset stations allow the user to dial while on 
hook. In addition, the keyset speaker is used to broad- 
cast pages and may provide background music (pro- 
vided an external music source is connected to the 
KSU). 5.9 When a display keyset is idle, the date and time 
(and, if enabled, user name and intercom number) 
are displayed. While on an outside call, in do-not- 
disturb, or unconditionally forwarded, certain other 
displays are shown. In these circumstances, use the 
following procedure to redisplay the date, time, 
name, and number for five seconds. 
5.10 TO DISPLAY THE DATE, TIME, USER NAME, AND 
INTERCOM NUMBER: 
5.6 A programming option can be enabled that dis- 
ables the speakerphone. This prevents a station from 
using the speakerphone on outgoing intercom or any 
outside calls. If enabled, the speakerphone can still 
Page 4-34 Press the SPCL key and enter the display date 
and time feature code (300). The date, time, 
user name, and intercom number are dis- 
played for five seconds.  
						

							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE FEATURES 
Issue 2, May 1990 
Circuit Number On Power-Up 
5.11 
To aid in installation and troubleshooting pro- 
cedures, display keysets show their station identifica- 
tion for five seconds when power is turned on and the 
keyset line cord is first plugged in. The intercom num- 
ber and assigned user name appear on the top line of 
the display, and the circuit number appears on the 
bottom line. This display also appears whenever the 
line cord is removed and replaced while power is on, 
after a system reset, or after a system initialization us- 
ing selection [K] in database programming. After the 
five-second identification display, the keyset changes 
to the appropriate display for the current status. 
5.16 Although the OVER key works much like the 
ANS key, the advantage of the OVER key is that it 
has an LED to indicate the status of ringing or hold- 
ing calls on the out-of-range lines. Also, when the 
OVER option is enabled, the keyset user will receive 
call waiting indications when more than one out-of- 
range line is ringing or holding. Unlike the ANS key, 
the OVER key cannot be used to access out-of-range 
lines for placing outgoing calls. 
5.17 When multiple out-of-range lines are ringing 
or holding, the priority list below determines which 
call is answered first. When the first call on the list is 
answered, the second call will camp on and send call 
waiting signals. Also, the OVER key will flash to indi- 
cate the status of the waiting call (ringing or holding). 
C.O. 
Line Keys 
5.12 The 
line keys provide direct access to the C.O. 
lines. Each line key is equipped with a light-emitting 
diode (LED) that indicates the status of the line. (Ihe 
ANS and OVER keys are sometimes used to access 
C.O. lines.) Line keys are associated with specific 
C.O. Line circuit numbers. Ringing outside calls (ring ins, recalls, callbacks, 
or transfers) are answered in the order they were 
received. 
5.13 Unused line keys can be designated as fixed- 
function feature keys by assigning feature codes, or 
they can be designated as user-programmable “sta- 
tion keys” for up to four “soft key groups.” Keysets 
are assigned to the soft key groups to determine the 
functions of the unused line keys. Refer to page 4-41 
for further information. Also see page 5-49 in PRO- 
GRAMMING. Then calls on individual hold are answered (not 
calls on system hold, conference hold, or being 
transferred). Calls are picked up in the orderthey 
were placed on hold. 
5.18 An exception to the OVER key showing the 
status of the waiting call occurs when the current call 
is in the process of being transferred to another sta- 
tion or to the public network. While the call is being 
transferred, the OVER key will flutter to indicate 
that the line is in a “transfer hold” condition. The 
OVER key will flutter until the transfer is eithercom- 
pleted or aborted. 
Automatic Out-Of-Range Line Selection And The 
OVER Key 
NOTE: To complete the transfer of an out-of-range 
C.O. line, the user must hang up, press another line 
key, or press the IC key. Pressing the OVER key will 
abort the transfer and reconnect the current call. 
5.14 When 1Zline keysets are used on a system that 
has more than 12 C.O. lines), incoming calls on the 
out-of-range lines may be accessed by pressing the 
ANS key (or by entering the automatic line selection 
feature code - 89). Pressing the ANS key answers 
the call that has been ringing or holding the longest at 
that keyset. If no call is ringing or holding, the high- 
est-numbered available auto line is selected for an 
outgoing call. 5.19 Out-of-range lines that are ringing in to the 
system will not flash on the OVER key if the station is 
programmed with outgoing-access or allowed-answer 
only. Station users must be assigned ring-in in order 
for the OVER key to show the status of the line. 
5.20 Calls accessed by the OVER key cannot be 
placed on system hold. Also, out-of-range lines that 
are placed on system hold by another keyset cannot 
be accessed using the OVER key. 
5.15 In addition to the automatic line selection fea- 521 If a 24-line keyset is installed, and the auto- 
ture, the database contains a station option that al- matic out-of-range line selection feature is enabled, 
lows line key 12 on all keysets to be designated as the line key 12 will act as the OVER key. However, line 
automatic “out-of-range” line selection key. This out- keys 13-24 can still be used for direct access to those 
of-ran;c line selection key is called the OVER key. lines. 
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							FEATURES 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
User-Programmable Speed-Dial (SPD/BLF) Keys 
with Busy Lamp Field 
532 The 
keysets have SPD/BLF keys that are used 
for storing and speed dialing up to 10 intercom and 10 
outside telephone numbers. The 1Zline keysets have 
eight SPD/BLF keys (the other two speed-dial num- 
bers are stored using location codes), and 24-line key- 
sets have 10 SPD/BLF keys. The keys have LEDs that 
form a busy lamp field to indicate the status of the 10 
stations that are accessed using the keys. 
Feature Keys And Station Keys 
5.23 
There are 18 feature keys on the 24-line key- 
sets and nine feature keys on the 1Zline keysets. 
These feature keys provide one-key dialing of feature 
codes. Eight of the keys on the 24-line keysets and six 
keys on the 1Zline keyset have fixed functions. Nine 
feature keys on the 24-line keyset and two keys on the 
12-line keyset are user-programmable keys that can 
be programmed by the keyset user to access any of the 
feature codes (except call splitting [337] which is a 
single-line feature). There is a programmable FWD 
key on both 12- and 24-line keysets that can be pro- 
grammed with any of the call forward feature codes. 
For feature key locations, refer to the illustrations at 
the end of the SPECIFICATIONS section. 
5.24 Unused line keys can be assigned feature codes 
and can be used as fixed-function keys, or they can be 
made into user-programmable “station keys” for up 
to four “soft key groups.” Refer to page 4-41 for fur- 
ther information. The default values of the station 
keys are assigned for each of the soft key groups in da- 
tabase programming. Refer to page 5-49 in PRO- 
GRAMMING. Station users can then re-program the 
station keys to access feature codes or intercom num- 
bers. If programmed with a feature code that utilizes 
the lamp (such as message or call forward), the lamp 
will show the current status of the feature as de- 
scribed in paragraph 5.30. (For the do-not-disturb fea- 
ture, use the on/off feature code for proper lamp op- 
eration.) If the key is given an intercom number, the lamp 
will provide status of the associated station as do 
the SPD/BLF or DSS/BLF keys. 
FWD Key 
5.25 The FWD key on the keyset can also be pro- 
grammed. It can be changed to access any of the call 
forwarding feature codes (351-358) so that users have 
easy access to the forwarding option they use most 
frequently. 
Feature Key Initialized Values 
5.26 The initialized values of the 24-line keyset’s 10 
user-programmable keys are as follows. Feature code 
descriptions start on page 4-5. 
KEY 
HOLD 
XFR 
ANS 
FLASH 
REDL 
SYS SPD 
QUE 
PAGE 
FWD 
BGND 
MUSIC 
FUNCTION 
Individual hold (336). 
Transfer C.O. call (345) also used for 
reverse transfer. 
< 
Automatic line selection (89). 
C.O. hookflash (330). 
Redial (380). When the system is ini- 
tialized, the mode of the redial fea- 
ture code is last outside number 
dialed (320). Users may reprogram 
the mode to last outside number 
saved (321). 
System speed dial (381). 
Busy line/station callback (queue) re- 
quest (6) also used to cancel a queue. 
Page (7). 
Call forward all calls (355). This fea- 
ture key may be reprogrammed with 
any of the call forward feature codes 
(however, other feature codes may 
not be used). Pressing a lit FWD key 
has the same effect as the cancel any 
call forward feature code (359). 
Background music on/off (313). 
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							INTER-TEL PRACTICES FEATURES 
GMX-48 INSTALLATION & MAINTENANCE Issue 2, May 1990 
5.27 The 
features accessed by the 24-line keyset’s 
eight fixed-function keys are shown below. 5.29 The features accessed by the 1Zline keyset’s 
six fixed-function keys are shown below. 
. 
I 
SPKR 1 Speakerphone on/off (312). 
Selects an intercom channel or picks 
up a holding or camped-on intercom 
I 
DND 1 Do-not-disturb on/off (372). 
Leave message (365); also used for 
retrieving and viewing messages when 
Signals the system to expect a feature 
5.28 The initialized values of the 1Zline keyset’s 
three user-programmable keys are listed below. Fea- 
ture code descriptions start on page 4-5. 
KEY 
HOLD 
XFR 
FUNCTION 
Individual hold (336). 
Transfer C.O. call (345) also used for 
reverse transfer. 
FWD Call forward all calls (355). This fea- 
ture key may be reprogrammed with 
any of the call forward feature codes 
(however, other feature codes may 
not be used). Pressing a lit FWD key 
has the same effect as the cancel any 
call forward feature code (359). 
KEY 
CNF 
SPKR 
IC 
FUNCTION 
Conference (5). 
Speakerphone on/off (312). 
Selects an intercom channel or picks 
up a holding or camped-on intercom 
call. 
DND 
MSG Do-not-disturb on/off (372). 
Leave message (365) also used for re- 
trieving and viewing messages when 
the flashing MSG key is pressed. 
SPCL Signals the system to expect a feature 
code. 
Keyset Light-Emitting Diode (LED) Indications 
. 
5.30 The keyset line keys, speed-dial (SPD/BLF) 
keys, and some of the feature keys contain light-emit- 
ting diodes (LEDs). The LED flash rates, shown on 
the next page, indicate the status of the stations, lines, 
and features. The rates are shown in interruptions 
per minute (IPM). 
5.31 A programming option can be enabled that will 
change the system hold flash rate to a continuous 
9601PM to differentiate it from the 60/96OIPM flutter 
used for individual hold. If the option is not enabled, 
both hold types use the 60196OIPM flutter. 
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							FEATURES 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
SLOW 30 IPM FLUTTER 
601960 IPM FAST 
240 IPM 
Recalling 
Intercom call is 
intercom call is 
camped on 
camped on  Data call 
is being 
monitored Data call is in 
progress; 
continuous = 
data device is 
off hook 
Intercom call 
is on hold 
DATA 
IC 
SPKR 
Speakerphone 
is on or ready 
for use 
CNF 
MUTE Conference is 
in progress Conference 
is recalling 
station lnitiator left 
zonference 
In progress; or 
:onf. party is on 
zonference wait 
lold 
Calls are being 
forwarded 
Message is 
waiting  MSG 
DND Your station is ir 
do-not-disturb 
SPD/BLF Station is in 
do-not-disturb  Station is 
busy or un- 
plugged 
Line is in use 
at another 
station or 
unplugged Station has a 
call ringing in 
Line is in use at 
your station Line is recall- 
!ng from hold 
x transfer 
1 
i 
( 
l 
1 ; 
L 
Ring in, 
call waiting, 
or busy line 
callback 
Out-of-range 
line is in use at 
your station &t-of-range 
.ine is recall- 
mg from hold 
or transfer Ring in, 
call waiting, 
or busy line 
callback Zontinuous = 
;tation left off 
look 
Line is on hold 
Continuous = 
Optional 
system hold 
flash co 
LINE 
I 
Out-of-range 
line is on 
individual hold 
at your station OVER 
I 
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							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE FEATURES 
Issue 2, May 1990 
Volume Controls 
5.32 
Speaker volume and ring tone volume are con- 
trolled by two thumbwheels on the right-hand side of 
the keyset. 
Selectable Ring Tone 
5.33 
Keyset users can select the type of ringing alert 
tone to be heard at their respective keysets. This is 
useful in open office settings where phones are close 
together and it is difficult to tell which one is ringing. 
Eight distinctive ring tones are available. 
5.34 
TO CHANGE KEYSET RING TONE: 
(1) While on hook, press SPCL and enter the 
select ring tone feature code (328). (Displays 
SELECT RING TONE.) 
(2) 
EITHER, Enter a number l-8 for the desired 
ring tone. 
OR, Press the asterisk (*) key or the pound (#) 
key to scroll through the tones. 
OR, Enter 0 or 9 to repeat the previously 
selected tone. 
(3) Lift and replace the handset, or allow the long 
interdigit timer to expire. The last tone 
selected will now be heard when the keyset 
rings. 
Connecting A Headset 
5.35 For convenience, a headset can be used at any 
keyset station. The SPKR key is used to connect and 
disconnect calls when the headset is attached. 
5.36 
TO CONNECT A HEADSET: 
(1) 
(2) 
(3) 
5.37 
(1) 
(2) 
(3) Disconnect the handset by unplugging the 
coiled handset cord from the base of the key- 
set. Leave the handset in the cradle. 
Insert the headset plug into the vacant handset 
jack. 
Press the SPCL key and enter the headset en- 
able feature code (315). 
TO DISCONNECT THE HEADSET 
f 
Disconnect the headset by unplugging the 
headset cord from the base of the keyset. 
Plug the coiled handset cord into the base of 
the keyset. 
While on hook, press the SPCL key and enter 
the headset disable feature code (316). 
Page 4-39  
						

							FEATURES 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
B. SINGLE-LINE SETS 
5.38 If using 
Advanced or Intermediate software, up 
to two Accessory Port Modules (APMs) can be in- 
stalled on the system. Each provides up to six single- 
line circuits that can be used for installing single-line 
sets, FAX machines, voice mail units, off-premises 
stations, or playback devices. (Playback devices can be 
used only with 
Advanced software.) 
5.39 There are two types of single-line sets: Single- 
Line Instruments (SLIs) and industry-standard 
single-line DTMF sets. 
Single-Line Instrument (SLI) 
5.40 The 
SLI has four user-programmable feature 
keys for one-key dialing of feature codes and a 
FLASH key that sends a timed hookflash to signal the 
system before a feature code is entered. The default 
values of the feature keys are defined in database pro- 
gramming (refer to PROGRAMMING, page 5-49, 
for details) and the keys can be programmed by the 
user (refer to page 4-41). They can be assigned any of 
the general feature codes or C.O. line access codes 
listed on pages 4-5 through 4-10 (except keyset-only 
and attendant codes). When the system is initialized, 
the feature codes assigned to the keys are as follows. 
KEY FUNCTION 
STN SPD Station speed dial (382) 
REDL Redial (380) 
ARS Automatic route selection (80) 
HOLD Individual hold (336). 
Industry-Standard Single-Line DTMF Set (2500 
Set) 
5.41 
Single-line DTMF set usersaccess the features 
by hookflashing (pressing and releasing the hook- 
switch quickly) and entering feature codes. 
Off-Premises Stations 
5.42 SLIs 
or industry-standard single-line sets can 
be used as off-premises stations. They are placed in a 
remote location and are connected Jo the system 
through a telephone company OPX line or a custom- 
er-provided line. Refer to INSTALLATION, page 
3-18 for specifications and installation procedures. 
5.43 Off-premises station users access the features 
by hookflashing (pressing and releasing the hook- 
switch quickly) and entering feature codes. 
C. 
DIRECT STATION SELECTION/BUSY 
LAMP FIELD (DSSIBLF) UNITS 
5.44 
There can be a maximum of five DSSlBLF 
Units in the system. DSS/BLF Units areprogrammed 
to be used with specific keysets, but are not physically 
attached to the keysets. Each unit requires separate 
cabling and a separate keyset circuit. For each DSS/ 
BLF Unit installed, one fewer keyset can be installed. 
5.45 Each DSS/BLF Unit provides one-key access 
to up to 60 numbers. These numbers are programmed 
in the database on a system-wide basis. The numbers 
can be either station intercom numbers or hunt/voice 
mail group pilot numbers. 
5.46 Together, the lamps in the keys create a busy 
lamp field that indicates the status of each station or 
hunt group assigned to the keys. The LED indicator 
in the key is solidly lit when the associated station is 
busy, flashes slowly when the station is in do-not- 
disturb, flashes fast when the station has a call ringing 
in, or flutters continuously if the station is causing a 
STATION OFF-HOOK system alarm. If assigned to 
a hunt group, the LED indicator is solidly lit when all 
stations in the hunt group are unavailable (busy, for- 
warded, in do-not-disturb, or removed from the hunt 
group) and it flashes fast when a call is camped on to a 
hunt group. 
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