CCITT 5 tones. MFC tones when you know how to use then with CCITT 5 tones will let you do anything a Fault Operator and Call Operator can do. They are however very difficult to understand. They aren’t simple ST- NUMBBR-KP type routing. So you will have to do some heavy programming to cope with the different signalling groups. So lets get started.
Index
Chapter 1. Frequency Table
Chapter 2. CCITT 5 Routing Table
Chapter 3. MFC Signalling Table
Chapter 4. Signalling Groups
Chapter 5. Horking it Together
Chapter 6. Other types of Signalling
Chapter 7. Hang Up Time
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Chapter 1. Frequency Table
Tone Table
I Forward I Backward I KEY I CCITT #5 IMPC I KEY – I-1-1-1-1-
1 I 1380 I 1500 I 1140 I 1020 I 1
2 I 1380 I 1620 I 1140 I 900 1 2
– I in routing programs i use the following I defined keys.
3 I 1500 I 1620 I 1020 I 900! 3 I Key ICCITTIMFC I See Chapter 6.
4 I 1380 I 1740 I 1140 [780 1 4 I-!-1-1 For other
Signalling
5 I 1500 I 1740 I 1020 I 780 1 5 I A I 11 [11 I Frequencies.
6 I 1620 I 1740 I 9001 7801 6 I В I 12 I 12 I
7 I 1380 I 1860 I 1140 I 6601 7 [С I KP I 13 I
8 I 1500 I 1860 I 1020 I 6601 8 I D I KP2 I 14 I
9 I 1620 I 1860 I 900 col1¦0t 9 I E I ST I 15 I
0 11740 1 1860 I 7801 6601 0 I-1-1-1
11 I 1380 I 1980 I 1140 I 5401 11 I This is for ease of programiting only. It is
12 I 1500 I 1980 I 1020 I 540 1 12 I best to have a single key switch to change KP I 1620 I 1980 I 900 col1¦0 1 13 I between Forward and
Backward frequencies.
KP2 I 1740 I 1980 I 7801 5401 14 1 So note. ST I 1860 I 1980 I 660 col1¦1 1 15 1 SF = Switch Forward –1 -1-1-[-1-1 SB = Switch Backward
NUMBER=Telephone number CCITT 5 Half Tones An example would translate from
– I–I-I–I-I–I SF-E-1-123456-*
1380 1150011620117401 I860 I 19801 to
– 1-1-1-1-1-1 Switch Forward tones
1140110201 9001 7801 660! 540 I ST-(1)-NUMBER-KP
MFC Half Tones
These half tones do strange things in the middle of routing. Like alarms going off and numbers Re-routed STD. Note that single frequencies will be bracketed. [] as below.
For example.
ST-(1)-0011-(CO – (AC)-NUMBER-KP-(OPD)-[1850]
The above is the formula for TASI line breaking.
CC=Country Code
AC=Area Code
OPD=Other Party Disconnects
[1850] The frequency in hz to get into a TASI control line.
Chapter 2. CCITT 5 Routing Table
NUMBER-KP
This is the simplest way to route a Phone Number. Also the only way alot of Australian Phreaker route. Depending on the
Signalling Trunk you may not be able to route a call over seas. Tor example STD
Signalling Trunk.
11-(Not used)
It’s use in CCITT 5 Routing is at present unknown. However some
Telecom Publications show it’s MFC counterpart used in routing to
Interception Centre and used by Incoming Operators.
12-(1)-ID
To
12-(9)-ID
These could be Non-Axe to Axe Exchange Switching signals. 12-(AC)– HUMBER
This routing is only allowed to Axe Exchanges from Son-Axe Exchanges.
This is very useful for Axe test numbers which are blocked from other Exchanges.
12-(KP)-1D
12-(KP2)-ID
12-(ST)-ID
These could be more Non-Axe to Axe Exchange Switching signals.
KP-(Not Used)
It’s use in CCITT 5 Routing is at present unknown.
KP2-(l)-3D’s
To
KP2-(9)-3D’s
The 3 digits maybe used as switches between Exchanges. For exaapla
Bwitch 456 Exchange to except ARE type routing or SXS type routing.
The signalling between Exchanges still being CCITT 5 and MFC but the internal switching is different.
KP2-(0)-NUMBER
It’s use in CCITT 5 Routing is at present unknown.
KP2-(11)-3D’s
KP2-(12)-3D’s
Maybe Exchange switches.
KP2-(12)-(0)-NUMBER
It’s use in CCITT 5 Routing is at present unknown.
KP2-(KP)-3D’s
KP2-(KP2)-3D'S
Maybe Exchange switches.
KP2-(ST)-(No CCITT 5 or MFC signals)
This maybe used as an echo suppressor.
ST-(1)-NUMBER
Another Routing method.
ST-(2)-4D’s
ST-(3)-4D’s
These maybe used to store or switch the lat 4 Digits on a given number. ST-(4)-ID
To
ST-(0)-ID ST-(11)-ID ST-(12)-ID ST-(KP)– ID ST– (KP2)– ID ST– (ST)-1D Maybe Exchange switches.
Chapter 3. MFC Signalling Table
HPC Signals have multiple function, so you’ll have to know what is sent and keep track of it to know what
