ASCOM Ascotel 2025 System Manual page 306

Call destination: Busy User Group
A user group is busy if all its members are busy and neither the element Operator
Console nor the element General call is activated.
If a user group is busy, an incoming call is routed to user group 16. If user group
16 is also busy,
• the caller in the public ISDN network will obtain the congestion tone after call
waiting has been rejected;
• the caller in the private leased-line network will obtain the congestion tone.
• a call from the public analogue network will wait until the subscriber is free
after call waiting has been rejected.
Subscriber has enabled call
waiting locally (#04 or by
function)
If subscriber is busy externally:
call waiting on outside calls is
enabled
no
Call waiting
rejected?
Connection OK
haz0119aaenb0
Fig. 2.66: Call distribution if user group busy
HBT_20321104_02/B0_en
Outside call
(with or without direct dial information)
UG
busy
yes
Call waiting
possible?
Manually
by SC
yes
Offer call
to LG 16
no All elements
busy?
Clear down
Offer call
connection,
to UG 16
caller obtains
congestion
tone
ascom Ascotel 2025/2045/2065
Subscriber has protected himself
against call waiting locally
(*04 or by function)
If subscriber is busy externally:
call waiting on outside calls is
disabled
no
yes
Digital
yes
connection?
no
Polling
(wait until
free)
Call Routing 2.129