cc/td/doc/product/tel_pswt/vco_prod
hometocprevnextglossaryfeedbacksearchhelp
PDF

Table of Contents

R2 Signaling Tones and Pulse Code Modulation Line Signaling

R2 Signaling Tones and Pulse Code Modulation Line Signaling

This chapter describes the R2 signaling tones generated and detected by the MFCR2 transceiver cards, and the R2 pulse code modulation (PCM) 2-bit line signaling transmitted and received by E1 digital interface cards.

Forward and Backward Signaling Tones

Table 2-1 through Table 2-4 provide R2 signaling information based on ITU-T Q.441 as it applies specifically to the Argentina telephone network.


Table 2-1: R2 Signaling Group 1 Forward Signals
Token Data Field Designation Frequencies Meaning

1

G-I-1

1380 + 1500 Hz

Digit 1

2

G-I-2

1380 + 1620 Hz

Digit 2

3

G-I-3

1500 + 1620 Hz

Digit 3

4

G-I-4

1380 + 1740 Hz

Digit 4

5

G-I-5

1500 + 1740 Hz

Digit 5

6

G-I-6

1620 + 1740 Hz

Digit 6

7

G-I-7

1380 + 1860 Hz

Digit 7

8

G-I-8

1500 + 1860 Hz

Digit 8

9

G-I-9

1620 + 1860 Hz

Digit 9

10

G-I-10

1740 + 1860 Hz

Digit 0

11

G-I-11

1380 + 1980 Hz

Reserved

12

G-I-12

1500 + 1980 Hz

Unaccepted

13

G-I-13

1620 + 1980 Hz

Routine testing

14

G-I-14

1749 + 1980 Hz

Reserved

15

G-I-15

1860 + 1980 Hz

For ANUM only


Table 2-2: R2 Signaling Group II Forward Signals
Token Data Field Designation Frequencies Meaning

1

G-II-1

1380 + 1500 Hz

Non-priority subscriber

2

G-II-2

1380 + 1620 Hz

Priority

3

G-II-3

1500 + 1620 Hz

Maintenance

4

G-II-4

1380 + 1740 Hz

Coin box

5

G-II-5

1500 + 1740 Hz

Operator

6

G-II-6

1620 + 1740 Hz

Data Transmission

7

G-II-7

1380 + 1860 Hz

Reserved

8

G-II-8

1500 + 1860 Hz

Reserved

9

G-II-9

1620 + 1860 Hz

Reserved

10

G-II-10

1740 + 1860 Hz

Reserved

11

G-II-11

1380 + 1980 Hz

Reserved

12

G-II-12

1500 + 1980 Hz

Reserved

13

G-II-13

1620 + 1980 Hz

Reserved

14

G-II-14

1740 + 1980 Hz

Reserved

15

G-II-15

1860 + 1980 Hz

Reserved


Table 2-3: R2 Signaling Group A Backward Signals
Token Data Field Designation Frequencies Meaning

1

A-1

1140 + 1020 Hz

Send next digit (n + 1)

2

A-2

1140 + 900 Hz

Send digit (n - 1)

3

A-3

1020 + 900 Hz

Number complete, send category and change over to reception of Group B signals

4

A-4

1140 + 780 Hz

Network congestion

5

A-5

1020 + 780 Hz

Send category and send ANUM

6

A-6

900 + 780 Hz

Set conversation

7

A-7

1140 + 660 Hz

Send digit (n - 2)

8

A-8

1020 + 660 Hz

Send digit (n - 3)

9

A-9

900 + 660 Hz

Send last digit

10

A-10

780 + 660 Hz

Start from first digit

11

A-11

1140 + 540 Hz

Reserved

12

A-12

1020 + 540 Hz

Reserved

13

A-13

900 + 540 Hz

Reserved

14

A-14

780 + 540 Hz

Reserved

15

A-15

660 + 540 Hz

Reserved


Table 2-4: R2 Signaling Group B Backward Signals
Token Data Field Designation Frequencies Meaning

1

B-1

1140 + 1020 Hz

Idle

2

B-2

1140 + 900 Hz

Send recorded message

3

B-3

1020 + 900 Hz

Busy

4

B-4

1140 + 780 Hz

Congestion

5

B-5

1020 + 780 Hz

Unassigned number

6

B-6

900 + 780 Hz

Free with charging

7

B-7

1140 + 660 Hz

Free without charging

8

B-8

1020 + 660 Hz

Out of service

9

B-9

900 + 660 Hz

Reserved

10

B-10

780 + 660 Hz

Reserved

11

B-11

1140 + 540 Hz

Reserved

12

B-12

1020 + 540 Hz

Reserved

13

B-13

900 + 540 Hz

Reserved

14

B-14

780 + 540 Hz

Reserved

15

B-15

660 + 540 Hz

Reserved

Pulse Code Modulation Line Signaling

Table 2-5 describes the 2-bit, channel-associated PCM line signaling used by the VCO system equipped with E1 interface cards. Forward signals are used by originating or outgoing ports, while backward signals are generated by incoming ports.


Table 2-5: R2 Pulse Code Modulation Line Signaling
Number Signal Exchange Signaling Forward Backward
Af Bf Ab Bb

1

Idle

1 0

1 0

2

Seize

0 0

1 0

3

Seize acknowledge

0 0

1 0

6a

Clear forward before answer

1 0

1 1

6a

Release guard

1 0

1 0

4

Seize acknowledge

0 0

1 1

4

Answer

0 0

0 1

6b

Clear forward after answer

0 0

1 0

7b

Release guard

1 0

1 0

5

Clear back

0 0

1 1

6a

Clear forward after clear back

1 0

1 1

7

Release guard

1 0

1 0

8

Blocking

1 0

1 1

9

Unblocking

1 0

0 0


hometocprevnextglossaryfeedbacksearchhelp
Posted: Sat Sep 28 18:27:32 PDT 2002
All contents are Copyright © 1992--2002 Cisco Systems, Inc. All rights reserved.
Important Notices and Privacy Statement.