IMG 1010 - E1 R2 Interworking

 

Overview:

Below are Digit Mapping and Cause Code Tables for Interworking of SS7(ITU) to the CAS (E1R2) protocol.

Category digit mapping for SS7 <> E1 R2 CAS

SS7 (ITU)

To

CAS (E1R2)

SS7 (ITU)

To

CAS (E1R2)

00

Unknown

>>

1

Subscriber w/o priority

01

Operator, French

>>

5

Operator

02

Operator, English

>>

5

Operator

03

Operator, German

>>

5

Operator

04

Operator, Russian

>>

5

Operator

05

Operator, Spanish

>>

5

Operator

06

mutually agreed language

>>

5

Operator

07

mutually agreed language

>>

5

Operator

08

mutually agreed language

>>

5

Operator

09

Reserved

>>

1

Subscriber w/o priority

0A

Ordinary Subscriber

>>

1

Subscriber w/o priority

0B

Calling Subscriber with Priority

>>

2

Subscriber with priority

0C

Data Call

>>

6

Data Transmission

0D

Test Call

>>

3

Maintenance Equipment

0F

Payphone

>>

4

Spare / Payphone

 

Everything ELSE

>>

1

Subscriber w/o priority

 

CAS (E1R2)

To

SS7 (ITU97)

CAS (E1R2)

To

SS7 (ITU97)

1

Subscriber w/o priority

>>

0A

Ordinary Subscriber

2

Subscriber with priority

>>

0B

Calling Subscriber with Priority

3

Maintenance Equip

>>

0D

Test Call

4

Spare / Payphone

>>

0F

Payphone

5

Operator

>>

02

Operator, English

6

Data Transmission

>>

0C

Data Call

7

Subscriber

>>

0A

Ordinary Subscriber

8

Data Transmission

>>

0C

Data Call

9

Subscriber with Priority

>>

0B

Calling Subscriber with Priority

0

Operator

>>

02

Operator, English

 

Everything ELSE

>>

0A

Ordinary Subscriber

Cause Code Mapping for SS7 <> E1R2 CAS

CAS (E1R2)

To

SS7 (ITU97)

2

Send special information tone

<>

38

Network out of order

3

Subscriber line busy

<>

17

User busy

4

Congestion

<>

42

Switching equipment congestion

5

Unallocated number

<>

01

Unallocated number

8

Out of order

<>

27

Destination out of order

 

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