HP FlexNetwork MSR Series Configuration Manual page 88

Designation
A-15
•
Group II forward signals—Identify the calling party category. The system looks at the calling
party category to decide whether the calling party can perform forced release or break-in.
Table 9 Group II forward signals
Designation
II-1
II-2
II-3
II-4
II-5
II-6
II-7
II-8
II-9
II-10
II-11 through II-15
•
Group B backward signals—Identify the state of the called party, and acknowledge Group II
signals and control connection.
Table 10 Group B backward signals
Designation
B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-9 through B-15
The following figure shows the exchange process requesting calling party information, which is
typical of R2 interregister signaling.
Basic Meaning
Congestion in an international exchange; terminate interregister signaling
interaction
Basic Meaning
Subscriber without priority
Subscriber with priority
Maintenance equipment
Spare for national use
Operator
Data transmission
Subscriber (or operator without forward transfer facility), for international use
Data transmission (for international use)
Subscriber with priority (for international use)
Operator with forward transfer facility (for international aid use)
Spare for national use
Basic Meaning
Spare for national use
Send special information tone
Subscriber line busy
Congestion
Unallocated number
Subscriber line free, charge
Subscriber line free, no charge
Subscriber line out of order
Spare for national use
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