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.

Table 1. Values of D5 (VARC)
 

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

Table 2. Values of D6 (VARC)
 

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).

Table 3. Values of D7 (VARC)
 

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.

Table 4. Values of D8 (VARC)
 

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