NEC NEAX2000 IVS2 Manuale Utente
NEAX2000
IVS
2
Q-SIG System Manual
Page 16
ND-70923 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
Service Features
Transit Counter Relaying
Transit counter is used as the information which informs the number of stages on tandem
connection. On the Q-SIG network, the transit Counter 0 is sent from the calling office. The
tandem office sends the transit counter to the destination office adding 1 to the value of received
transit counter. In this manner, the transit counter value increases according to the number of the
stages of tandem connection.
connection. On the Q-SIG network, the transit Counter 0 is sent from the calling office. The
tandem office sends the transit counter to the destination office adding 1 to the value of received
transit counter. In this manner, the transit counter value increases according to the number of the
stages of tandem connection.
Figure 1-10 Transit Counter
• This feature is available when the all PBXs in the network are connected to each other by
Q-SIG interface.
• The transit counter values 0 through 31 are available.
• If the tandem office does not receive the transit counter from the opposite office, the tandem
office sends the transit counter as “0” to next office.
TRC=0
TRC=1
TRC=2
TRC=3
TRC=3
Q-SIG NETWORK
CALLING
OFFICE
TANDEM
OFFICE
TANDEM
OFFICE
TANDEM
OFFICE
DESTINATON
OFFICE
TRC: Transit Counter