�1���� Telex conversation mode
�2���� Access to the public telegram service
�3���� User class-of-service
�4���� Public telex booth
�5���� Outgoing only terminal
�6���� Incoming only terminal
�7���� Access barred
�8���� Restricted service
�9���� Priority
10���� Absolute
priority
11���� Priority
for called subscriber
12���� In-local
override
13���� Direct
outgoing selection
14���� Direct
incoming selection
15���� Direct
incoming selection with integrated numbering
16���� Direct
incoming selection with two-stage selection
17���� Closed
user group
18���� Partially
closed user group
19���� User
facility
20���� Automatic
calling
21���� Automatic
answering
22���� Manual
answering
23���� Automatic
identification
24���� Line
identification by the network
25���� Automatic
date and time indication
26���� Indication
of duration
27���� Indication
of charge
28���� Statement
of call account
29���� Shared
terminal
30���� Accounts
for shared terminal
31���� Storage
of call content
32���� Retrieval
of stored call content
33���� Statistics
on request
34���� Recorded
message
35���� Camp-on:
connect when free
36���� Camp-on
with recall
37���� Absent
subscriber service (in telegraphy and data communication)
38���� Call
re-direction
39���� Changed
address interception
40���� Store-and-forward
41���� Storage
installation
42���� Redirection
address
43���� Delayed
delivery
44���� Message
priority
45���� Message
spacing
46���� Header
47���� Booked
call
48���� Network
recall
49���� Multi-address
call
50���� Conference
call
51���� Broadcast
call
52���� Restricted
conference call
53���� Broadcast
conference call
54���� Prefix
55���� Escape
code