VARI - TL72

Signal diagram variations for incoming traffic

Format

VARI = D1D2D3D4D5D6D7D8

D1D2D3D4D5D6 =

000000

Reserved

D7 =

0 - D

See Table Table 1.

D8 =

0 - F

See Table Table 2
Table 1. Values of D7 (VARI)
 

0

1

4

5

8

9

C

D

Simplified MFC

.

.

.

.

.

.

.

.

No

X

X

X

X

.

.

.

.

Yes

.

.

.

.

X

X

X

X

Keycode receiver level

.

.

.

.

.

.

.

.

Normal

X

X

.

.

X

X

.

.

Amplified

.

.

X

X

.

.

X

X

Send PTS as

.

.

.

.

.

.

.

.

No PTS

X

.

X

.

X

.

X

.

Dial tone

.

X

.

X

.

X

.

X
Table 2. Values of D8 (VARI)
 

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Send answer signal to

cooperative exchange

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

No

X

X

X

X

X

X

X

X

.

.

.

.

.

.

.

.

Yes

.

.

.

.

.

.

.

.

X

X

X

X

X

X

X

X

Category request available

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

(CCITT A-5)

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

No

X

X

X

X

.

.

.

.

X

X

X

X

.

.

.

.

Yes

.

.

.

.

X

X

X

X

.

.

.

.

X

X

X

X

Type of register signalling

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

None

X

.

.

.

X

.

.

.

X

.

.

.

X

.

.

.

Decadic pulsing

.

X

.

.

.

X

.

.

.

X

.

.

.

X

.

.

Key code

.

.

X

.

.

.

X

.

.

.

X

.

.

.

X

.

MFC

.

.

.

X

.

.

.

X

.

.

.

X

.

.

.

X

Function

The parameter indicates the signal diagram variations for incoming traffic.

VARI may be omitted for outgoing traffic only.

Example 1

Simplified MFC

No

Keycode receiver level

Normal

Send PTS as

No PTS

Send answer signal ...

Yes

Category request available

No

Type of register signalling

Decadic pulsing

VARI = 00000009

Example 2

Simplified MFC

No

Keycode receiver level

Normal

Send PTS as

No PTS

Send answer signal ...

Yes

Category request available

Yes

Type of register signalling

MLC

VARI = 0000000F

Parent topic: VARI
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