User guide

August 2001 25
Defining Digit Types
Group I Signals
Table 7 shows the meaning of the Group I signals as they are
defined in the ITU-T standards. These signals convey
information about the country or the language of the originating
call or the digits in a number. The meaning of Group I signals
depends on whether they are sent at the beginning of a call or
in response to a Group A request for information.
Table 7. Group I Signals
Signal Meaning 1 Meaning 2
1 Language: French Digit 1
2 Language: English Digit 2
3 Language: German Digit 3
4 Language: Russia Digit 4
5 Language: Spanish Digit 5
6 Spare (language) Digit 6
7 Spare (Language) Digit 7
8 Spare (Language) Digit 8
9 Spare (Discriminating) Digit 9
10 Discriminating digit Digit 0
11 Country code: outgoing
half-echo suppressor
required
Access to incoming operator
12 Country code: no
echo-suppressor required
i) Access to delay operator
ii) Request not accepted
13 Test call indicator i) Access to test equipment
ii) Satellite link not included
14 Country code: outgoing
half-echo suppressor
inserted
i) Incoming half-echo
suppressor required
ii) Satellite link included
15 Signal not used End of identification