4000 Router Series Voice Configuration Guide

Desi

nation Basic Meanin

A-12 Send language or discrimination digit

A-13 Send nature of circuit

A-14

Request for information on use of an echo canceller (is an incoming half-echo

suppressor required?)

A-15

Congestion in an international exchange; terminate interregister signaling interaction

or at its output

• 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

nation Basic Meanin

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

nation Basic Meanin

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