R0106-HP MSR Router Series Voice Configuration Guide(V7)

38
Desi
g
nation Definition
A-15
Congestion in an international exchange. Terminate interregister signaling
interaction.
• 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 6 Group II forward signals
Desi
g
nation Definition
II-1 Subscriber without priority.
II-2 Subscriber with priority.
II-3 Maintenance equipment.
II-4 Spare for national use.
II-5 Operator.
II-6 Data transmission.
II-7 Subscriber (or operator without forward transfer facility), for international use
II-8 Data transmission (for international use).
II-9 Subscriber with priority (for international use).
II-10 Operator with forward transfer facility (for international aid use).
II-11 through II-15 Spare for national use.
• Group B backward signals—Acknowledge Group II signals and indicate the status of the called
party.
Table 7 Group B backward signals
Desi
g
nation Definition
B-1 Spare for national use.
B-2 Send special information tone.
B-3 Subscriber line busy.
B-4 Congestion.
B-5 Unallocated number.
B-6 Subscriber line free, charge.
B-7 Subscriber line free, no charge.
B-8 Subscriber line out of order.
B-9 through B-15 Spare for national use.
Figure 19 shows the exchange process requesting calling party information, which is typical of R2
interregister signaling.