VARC - TL30
Signal Diagram Variations Common for Incoming and Outgoing Traffic
Format
VARC = D1D2D3D4D5D6D7D8 |
||
D1D2D3D4 = |
0000 |
Reserved. |
D5 = |
0 - 5 |
See Table 1. |
D6 = |
0 - F |
See Table 2. |
D7 = |
0 - F |
See Table 3. |
D8 = |
0 - F |
See Table 4. |
0 |
1 |
2 |
3 |
4 |
5 |
|
Type of MFC signaling |
. |
. |
. |
. |
. |
. |
CCITT R2 code |
X |
. |
. |
. |
. |
. |
Ericsson (LME) code |
. |
X |
. |
. |
. |
. |
CCITT R2 code, India |
. |
. |
X |
. |
. |
. |
CCITT R2 code, Czech |
. |
. |
. |
X |
. |
. |
CCITT R2 code, Hungary |
. |
. |
. |
. |
X |
. |
CCITT R2 code, Thailand |
. |
. |
. |
. |
. |
X |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
A |
B |
C |
D |
E |
F |
|
A-number length *1) |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
No A-number |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
1 digit |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
2 digits |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
3 digits |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
4 digits |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
5 digits |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
6 digits |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
7 digits |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
8 digits |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
9 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
10 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
11 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
|
12 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
13 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
14 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
15 digits |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
*1) |
Used for MFC CCITT R2 code, India (MFC A-4 to request A-Number). |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
A |
B |
C |
D |
E |
F |
|
Handling of slip faults *2) |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
Disturbance mark board |
X |
X |
X |
X |
X |
X |
X |
X |
. |
. |
. |
. |
. |
. |
. |
. |
Block board |
. |
. |
. |
. |
. |
. |
. |
. |
X |
X |
X |
X |
X |
X |
X |
X |
Type of external line |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
Other type of external line |
X |
X |
X |
X |
. |
. |
. |
. |
X |
X |
X |
X |
. |
. |
. |
. |
Public line, Italy |
. |
. |
. |
. |
X |
X |
X |
X |
. |
. |
. |
. |
X |
X |
X |
X |
Semipermanent connections |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
No |
X |
X |
. |
. |
X |
X |
. |
. |
X |
X |
. |
. |
X |
X |
. |
. |
Yes |
. |
. |
X |
X |
. |
. |
X |
X |
. |
. |
X |
X |
. |
. |
X |
X |
Intrusion in net |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
No |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
Yes |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
. |
X |
*2) |
SLIP must be handled the same way by all 30 individuals on the board. |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
A |
B |
C |
D |
E |
F |
|
Type of signalling diagram |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
CCITT - R2 Standard (ITU-T Q.422) |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
CCITT - R2 Finland |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
Standard (AXE) |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
One Channel |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
A 204 (Finland) |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
ALS70 User |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
ALS70 Network |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
. |
Discontinuous (Pulsed) |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
. |
Colisee User |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
. |
Colisee Network |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
. |
2 TP-E (CIS) |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
. |
F6A Outgoing |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
. |
F6A Incoming |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
. |
K Line signalling (Czech) |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
. |
CCITT-R2 Poland |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
. |
CCITT-R2 Argentina |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
. |
X |
Function
The parameter is used to state signal diagram variations common for incoming and outgoing traffic.
Parameter VARC is mandatory.
Note: For bothway traffic the digital signal diagram for incoming and outgoing traffic must be identical.
If MFC is used for incoming traffic, then decadic, tone code or MFC signaling can be used for outgoing traffic providing the route is bothway.
If MFC is used, then PTS as tone cannot be used.
If A-number request shall be used for incoming traffic, and MFC signaling shall be used, the incoming route shall be categorized to allow A-number request from the public network and the called party shall be categorized to allow request of A-number from the PSTN.
The A-number request is not applicable when TL30 is initiated as a tie line!
Example
Type of MFC signalling |
CCITT R2code |
A-number length |
No length specified |
Handling of slip faults |
Disturbance mark board |
Type of external line |
Other type ... |
Semipermanent connections |
No |
Intrusion in net |
No |
Type of signalling diagram |
Standard (AXE) |
VARC = 00000002