XPost: alt.2600, alt.answers 
 From: harlequin@fnord.org.uk 
  
 Archive-Name: alt-2600/faq/part3 
 Posting-Frequency: Random 
 Last-Modified: 2000/05/29 
 Version: .014 
  
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
 This is a second dial tone returned to an operator between digits 
 indicating that he/she may dial the remainder of the number.  For 
 example, when an operator reaches a link-type Community Dial Office via 
 a step-by-step office after dialing a routing code, he/she must pause 
 until an idle link at the Community Dial Office returns dial tone. This 
 method of operation is not recommended or considered standard. 
  
 Dial-Normal Transmission Signal is a steady Low Tone. 
  
  
 Dial Jack Tone 
 ~~~~~~~~~~~~~~ 
 Low tone is used as a start-dial signal to tell a DSA operator that the 
 connection reached through a dial jack is ready to receive dialing. 
  
 Dial Jack Tone is a steady Low Tone. 
  
  
 Order Tone 
 ~~~~~~~~~~ 
 High tones sent over interposition, local interoffice, or toll trunks 
 indicate: 
  
         (1) the the originating operator that the order should be 
         passed 
         (2) to the receiving operator that an order is about to be 
         passed 
  
 For Call Announcement and Autometic Display Call Indicator, the tone 
 serves function two only. 
  
         (a) Single-order tone - This is a relatively long (0.5 second) 
             signal which means that the originating operator should 
             pass the office name and number. 
  
         (b) Double-order tone - This signal is two short spurts in quick 
             succession and means that the operator should pass only the 
             desired number. 
  
         (c) Triple-order tone - This signal is three short spurts in 
             quick succession and means that the operator should pass the 
             office name only and wait for another order tone. 
  
         (d) Quadruple-order tone - This signal is four short spurts in 
             quick succession and means that the operator should pass the 
             city name only and wait for another challenge.  It is used 
             in manual toll tandem (also called zip tones or trunk 
             assignment tones). 
  
 Single-order tone is one .5 spurt of High Tone. 
 Double-order tone is two short spurts of High Tone. 
 Triple-order tone is three short spurts of High Tone. 
 Quadruple-order tone is four short spurts of High Tone. 
  
  
 Intercepting Loopback Tone 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~ 
 High tone sent from an intercept operator to the 'A' board operator in 
 manual offices indicates that an intercept operator has completed the 
 call and that the 'A' should disconnect from the circuit.  The 
 completion of intercepted calls in this manner is no longer recommended. 
  
 Intercepting Loopback Tone is a steady High Tone. 
  
  
 Number Checking Tone 
 ~~~~~~~~~~~~~~~~~~~~ 
 High tone is sometimes used at DSA switchboards in No. 1 crossbar and 
 some step-by-step areas to verify the verbal identification of the 
 calling line. 
  
 Number Checking Tone is a steady High Tone.  On some older systems, 
 Number Checking Tone was a steady 135 Hz tone. 
  
  
 Coin Denomination Tones 
 ~~~~~~~~~~~~~~~~~~~~~~~ 
 These tones enable the operator to determine the amount deposited in 
 coin telephones. 
  
 Coin Denomination Tones for the old 3 slot payphones were: 
  
         Nickel  - One tap of 1050 Hz and 1100 Hz (bell) 
         Dime    - Two taps of 1050 Hz and 1100 Hz (bell) 
         Quarter - One tap at 800 Hz (gong) 
  
  
 Coin Collect Tone 
 ~~~~~~~~~~~~~~~~~ 
 Low tone over a coin recording-completing trunk informs the originating 
 toll operator that the local operator or coin control circuit has 
 collected the charge. 
  
 Coin Collect Tone is a steady Low Tone. 
  
  
 Coin Return Tone 
 ~~~~~~~~~~~~~~~~ 
 High tone over a coin recording-completing trunk informs the originating 
 toll operator that the local operator or coin control circuit has 
 returned the change when the connection is not completed (also called 
 coin refund tone). 
  
 Coin Return Tone is a single .5 to 1 second burst of High Tone. 
  
  
 Coin Return (Test) Tone 
 ~~~~~~~~~~~~~~~~~~~~~~~ 
 High tone is used to tell an operator in a dial central office that a 
 tester has completed a call to his/her position over a coin trunk. 
  
 Coin Return (Test) Tone is a single .5 to 1 second burst of High Tone. 
  
  
 Group Busy Tone 
 ~~~~~~~~~~~~~~~ 
 This audible signal is indicated by low tone on the sleeve of trunk 
 jacks at cord switchboards.  Absense of the tone tells the operator that 
 there is at least one idle trunk in a group. 
  
 Group Busy Tone is a steady Low Tone. 
  
  
 Vacant Position Tone 
 ~~~~~~~~~~~~~~~~~~~~ 
 Low tone is applied to all straightforward trunks terminating in a 
 vacated position in manual offices. 
  
 Vacant Position Tone is a steady Low Tone. 
  
  
 Dial Off-Normal Tone 
 ~~~~~~~~~~~~~~~~~~~~ 
 Low tone is returned to an operator after he/she has completed a call 
 into a step-by-step office and after the calling party has answered to 
 remind him/her to restore the dial key. 
  
 Dial Off-Normal Tone is a steady Low Tone. 
  
  
 Permanent Signal 
 ~~~~~~~~~~~~~~~~ 
 A customer line, not in use, which exhibits a steady off-hook condition 
 is routed to a permanent signal trunk.  High tone, superimposed on 
 battery, is supplied through a resistance lamp to the ring of the trunk. 
 The tone is used to inform an operator or other employee making a 
 verification test that the line is temporarily out of service.  An 
 intermittent ground may also be applied to the ring of the telephone 
 systems left in the hold condition.  Typical reasons for the line 
 condition are: 
  
         (a) No dialing within the allowed waiting interval. 
         (b) A handset is off-hook. 
         (c) Low insulation resistance or other line trouble. 
  
 In some offices, if three or more digits are dialed but not a complete 
 telephone number or code, the call is released and dial tone is 
 returned. 
  
 Permanent Signal is a steady High Tone. 
  
  
 Warning Tone 
 ~~~~~~~~~~~~ 
 High tone warns an operator that the circuit he/she is connected to is 
 not in condition for normal operation.  Examples: 
  
         (1) An operator at an Automatic Display Call Indicator position 
             plugs in the wrong jack. 
         (2) An operator at a sender monitor position plugs into a 
             sender supervisory jack while the sender is under test. 
  
 Warning Tone is a steady High Tone. 
  
  
 Trouble Tone 
 ~~~~~~~~~~~~ 
 Low tone applied by an operator or test person at a B position in a 
 manual office to the jack sleeve of a line or trunk in a calling 
 multiple tells other operators the line or trunk is in trouble (also 
  
 [continued in next message] 
  
 --- SoupGate-Win32 v1.05 
  * Origin: you cannot sedate... all the things you hate (1:229/2)