IMG 1010 - E1 R2 Interworking

Overview:

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

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)
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

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