Bell System 507 User manual

TABLE OF CONTENTS
Description of th e 507 Swit chb oard
Incoming Calls
Out going Calls Dialed by S
tat ion User __
Out going Calls Placed by PBX Attendant _
Call to An
oth er Sta tion With in the PBX System 10
All Conn ectin g P
ath s in Use __ 12
Tran sferring an Incoming Call _ 12
Recallin g the C
entr al Office Operator 13
Disconn ect Signals _ 13
Trunk Holding Keys __ 14
Night Connecti ons __ 16
Equipm ent Tr ouble __
Batt ery Suppl y Failur e
Ringing Power
Failur e _
18
18
18

Description ofthe 507 Switchboard
1. Supervisory Lamps
2.
Trunk Connecting Keys
3. Station Connecting Keys
4. Attendant's Talking Keys
5. Attendant's Key
Talking (operated up)
Night Service (operated down)
6. Station Keys
Connecting (operated up)
Ringing (operated down)
7. Station Line Lamps
8. Designation Strip
9. Instruction Plate
10. Trunk Line Lamps
11.
Trunk Connecting and Holding Keys
12. Buzzer Key
13. Attendant's Telephone

Incoming Calls
ANSWERING THE CALL
When a trunk lamp lights (1) :
•Remove
the handset of th e switchboard tel ephon e; at
th e sam e tim e
operat e an attendant's talkin g key (3)
to an idle conn
ecting path.
• Op erate a trunk conn ecting key (2) above the light ed
trunk signal to the same connecting path.
• Answer immediately with your firm name .
ESTABLISHING CONNECTION
While you are accepting and acknowledging the order, if
the called statio n is not busy:
• Op
erate the called station con necting key (4) to t he
path used to answer the call.
•
Ring the called station by operating downwa rd thc
ringing key (5 ) above th e called station desig nation.
Ring stead ily for about 2 seconds , pau se for about 5
seconds, and follow with a
nother 2-second ring.
• Keep the
station connect ing key operated and remain
on the conn ection unt il
the called stat ion answers.
• Resto re the att endant's ta lking kcy to its norm al
position and replace th e
hands et of the switchboard
telephone.

Outgoing Calls
Dialed by Station User
ANSWERING THE CALL
When a sta tion lamp li ghts:
•Remove the handset of the switchboard telep hone and
at the sam e tim e operate an attendant's ta lking key
(2) to an idle conn e
cting path "
•
Operate a connecting key (1) over the statio n signal to
the same conn ecting path.
• Answe r with an app ropriat e phrase.
ESTABLISHING CONNECTION
• Acknowledg e th e order and restor e th e attendant's
talking key (3) to norma lposition.
• Op
erate th e connect ing key (4) of th e highest nurn-
bered idle trunk to th e connecting path used to answ er
the call.
• Replace
the handset of the swit chboard telep hone .
Note: Th e at te nda nt 's talking key must be re stor ed be-
fore the
statio n user sta rts to dial as otherwise part of
the diali ng may not reach th e
cent ral officeequipment.

Outgoing Calls
Placed by PBX Attendant
ANSWERING THE CALL
When a sta tion lamp li ghts:
•Remove the handset of the switchboard telephone and
at the same time operate an attendant's talking key
(2) to an idle
connecting path.
• Operate a connecting key (1) over the station signal
to th e same connecting path.
• Answer with appropriate phrase.
ESTABLISHING CONNECTION
• Acknowledge the order and restore the station con-
ne
cting key (4) to normal.
• Operate the trunk connecting key (5) over the highest
number ed idle trunk to the connecting path to which
the att endant's talking key (3) is operated.
• Wait for dial tone , which indicates that the cent ra l
office equipment is
ready to receive your call. Then dial
th e
number.
If th e s tation user is holdin g th e line:
•
Re-operate the calling station key to the path to which
the trunk conne cting key is operated and restore the
attendant 's talking key (1) to normal position.
If the statio n user has hun g up :
•
Either ring him back and request that he hold the line,
or
remain on th e connection yourself until the called
party answers .

Call to Another Station Within
the PBX System
ANSWERING THE CALL
When a station lamp lights:
•Remove th e handset of th e switc hboa rd tel
ephon e and
at th e sa me time operate an att end ant' s talking key
(2) to an idle connecting p
ath .
• Op
erate a connect ing key (1 ) over th e st ation signal
to th e sam e connec ting path.
• Answer with appropriat e phrase.
ESTABLISHING CONNECTION
• Ackn owledge th e or der a nd operat e th e connec ting key
(3) above th e called station d
esignation to th e con-
nect ing p
ath used to a nswer th e call .
•Ring th e called sta tio n by op
eratin g d ownward th e
rin
ging key (4) ab ove th e called st at ion d esignation .
Ring steadily for
about 2seconds, pause for abo ut 5
seconds, and follow with
another 2-second ring,
• Re
stor e th e at tend ant' s t alkin g key to normal, and re-
place th e
hands et of th e switchboard telephone.
10

All Connecting Paths in Use
The switc hboard has five connecti ng paths, making pos-
sible five sepa
rate connections, as follows:
Top Row :Two keys raised in top row to first
path.
Top ROle: Two keys lowered in top row to
second
path .
Ce nte r ROle: Two kevs raised in center row to
third pat h.
C enter ROle: Two keys lowered in cente r row to
fourt h pat h.
Bottom Row: Two keys raised in bottom row to
fifth
path.
Transferring an Incoming Call
If you a re requ ested to tr ansfer an incoming call:
• Keep th e
attendant's talking key operated and the
handset of the switchboard telephone off the switch-
hook to avoid a cutoff.
•
Restore the conne cting key of the first station line;
operate the connecting key of the desired station, pro-
vided it is not
busy, and ring.
• Keep th e
station connecting key operated and remain
on the connection until called station answers.
12

If the sta tion is busy:
•
Report this to the calling person . Then pro ceed as on a
new call to a busy station , J!:ivinJ!: frequ ent progress
reports and being governed b)' an)' ehang e gtven in
instructions.
,vole: Outgoing calls may not be tr ansferred by flashing.
The sta tion user should not hang up, but should reach
the
attenda nt on ano the r s tation and req uest the
transfer.
Recalling the Central Office Operator
To recall the cent ral officeoperator:
•
Operate the attendant's talking key, and move th e
switehhook of the switchboard telephone up and down
about twice a second. Paus e every second time, and
listen for the op
erator to answer .
Disconnect Signals
When the station user replaces the receiver on the hook,
the supervisory signal will light . Restore the trunk and'
sta ti on co nnec ti ng keys a ssocia te d wit h supe rviso ry
signal.
13

Trunk Holding Keys
The trunk keys in the bottom row when op erat ed down-
ward are
"Trunk Holding Keys." Use these keys for hold-
ing connections on
trunk lines when the sta tion user is not
on the line and you are r
equir ed to leave the line.
Conditions und er which th e hold ing key may be used ar e:
An incoming call on which th e called sta tio n is bu sy or
slow in an swering and th e a tte nda nt mu st leave th e line
to answer
anoth er call.
An incoming call on which th e a
tte ndant is trying to
locate
the called person.
An outgoing call on which the calling sta tion ha s hun g
up and th e a
tte nda nt mu st leave the line while w aitin g
for the called
number to an swer.
METHOD OF USING THE HOLDING KEYS
• Oper ate d ownward th e holding key (1) ass ociated
with th e trunk .
• Rest or e th e
trunk connect ing key (2) to norm al and
re
stor e th e att end ant 's t alk ing key,
• P
erf orm th e o pera tio n (3) wh ich req uir ed th e use of
th e holding key,
• R
eturn to th e held connection by opera ting th e att end -
an
t's t alkin g key, th e trunk connecti ng key, and s ta -
tion key to th e same
pat h.
• Rest or e th e holdin g key,
14

Never ope rate the holding key before you have answe red
the incoming call. To do so will
stop the ringing signal and
may cause the calling party to hang up, or it may increase
the charge on the call.
,'''0 /'': A botto m row key should be used for a tru nk
connection only when all other pa ths are busy, beca use
if later ope rate d as a holding key, a cutoff might result
wh en
cha nging from the con nec t ing to th e holdi ng
position.

Night Connections
It is important that all trunks, on which night calls may
be received when
switchboard is unattended , be connected
with station lines locat ed where someone is available to
answer.
Keep a list at the switchboard, showing the stations used
for
night service and the number of the trunk to be con-
nected to each .
ESTABLISHING NIGHT CONNECTIONS
• Turn th e buz zer key (1) to "OF F" positi on.
• Conn ect eac h s
ta tion to be used with th e par ti cul ar
trunk (2) spec ified for ni ght service.
• Oper at e th e ni ght serv ice key (3) to preve nt ha ving
l
amp s li ght ed all night.
RELEASING NIGHT CONNECTIONS
• Re stor e ni ght serv ice key. Conne ctions which are not
in use will be
indicat ed by stead y sup erv isor y s igna ls.
• Re
stor e th e connect ing keys on connect ions on whi ch
disconn ect sig nals app ear.
•
Turn th e buzzer key to th e "ON" position .
No te: Do not connect more than two stations to any
one
trunk when establishing night connections. Should
a station have more
than one telephone on its line, each
telephone should count as a station.
16

Equipment Trouble
Trouble that is encountered on Telephone Company pro-
vided eq
uipment should be reported promptly to the Tele-
phone Company "Repair Service ."
Test all faults before reporting them to "Repair Service."
Report station troubl e by station number, not by name.
Whenever trouble is
encountered at an installation that
includes customer termina l equipment , it is important to
determine where the trouble exists.
The only trouble that
should be reported to the Telephone Company "Repair
Service" is
troub le that is encountered on equipment in-
stalled by the Telephone Company.
Battery Supply Failure
Should the battery supply to your switchboard fail, indi-
cated by the non -functioning of the switchboard signa ls,
call Telephone Company "Repair Service" from your
switchboard telephone and report the troub le. During the
interval prior to
restoration of the battery supply, incom- :
ing calls may be answered and outgoing service given by
connecting all
central office trunks to station telephones
in the
manner you put up night connections. Do not op-
erate the night service key. With the night service key in
the normal position,
restoration of the battery supply will
be indicated by the lighting of the supervisory lamps as-
sociated with the connections established
but not being
used.
Ringing Power Failure
Immediately report the condition to Telephone Compa ny
"Repair Service."
18