Nortel Networks R2MFC Manuel D’Utilisation

Configuring DIP switch settings and definitions

NN40010-300

Mexico Config 2 R2 signals are according to CCITT standard. See 

2 R2 signal definitions. 

Note: CD bits are not used. They are set to 01 in transmit direction, and are ignored in receive direction.

MFC signal definitions depends on the stage and the direction of the call; there are four tables of 
15 signals each: the first stage uses I signals forward and A signals backward, and the second stage 
uses II signals forward and B signals backward. The meaning of the signals can also be different 
when being transmitted or received. Meanings of the MFC signals are configurable. MFC signal 
tables are part of the country-specific parameters.

 shows the MFC signal configuration in the R2MFC MBM accessed through the CLI for 

Mexico Config 2. 

 shows the MFC transmitted signal configuration in the 

R2MFC MBM accessed through the CLI for Mexico Config 2. These values are preconfigured by 
the faceplate DIP switches as shown in 

 for information on the CLI. 

Table 31   Mexico Config 2 R2 A/B signals

Signal

A

B

Signal

A

B

Idle

1

0

Idle

1

0

Seize

0

0

Seize acknowledge

1

1

Clear forward

1

0

Answer

0

1

Clear back

1

1

Block

1

1

Table 32   Interpretation of received MFC signals (Sheet 1 of 2)

FW_Digit_1

I_1

FW_Categ_1

II_1

BW_NextDig

A_1

BW_FreeCharge

B_1

FW_Digit_2

I_2

FW_Categ_2

II_2

BW_PrevDigit

A_2

BW_Busy

B_2

FW_Digit_3

I_3

FW_Categ_3

II_3

BW_BCateg

A_3

BW_B_Congest

B_3

FW_Digit_4

I_4

FW_Categ_4

II_4

BW_A_Congest

A_4

BW_B_Congest

B_4

FW_Digit_5

I_5

FW_Categ_5

II_5

BW_Category

A_5

BW_Unlocated

B_5

FW_Digit_6

I_6

FW_Categ_6

II_6

BW_SpeechChrg

A_6

BW_B_Congest

B_6

FW_Digit_7

I_7

FW_Categ_7

II_7

BW_Prev2Digit

A_7

BW_B_Congest

B_7