ASCOM Ascotel 2025 System Manual page 199

ascom Ascotel 2025/2045/2065
Calls with the "Internal" Ringing Pattern:
• Calls from internal subscribers
• Calls from the public network if "Ringing pattern = single ringing tone" is set
in the subscriber configuration.
This setting is recommended if the subscriber is a terminal (not a system termi-
nal) that automatically answers a call (e.g. a fax machine) as not all devices are
capable of correctly interpreting the external ringing pattern.
• Calls from subscribers from the private network (PISN subscriber):
– Calls from the private leased-line network
– Calls from virtual network PISN subscribers
• An enquiry call from a subscriber with an outside call on hold if "Ringing pat-
tern internal / external = internal" is set in the common settings (see "Hold
(Enquiry Call)", Page 2.324).
Calls with the "External" Ringing Pattern:
• Calls from the public network
– if they do not originate from a virtual network PISN subscriber and
– if "Ringing pattern = automatic" is set in the subscriber configuration
• An enquiry call from a subscriber with an outside call on hold if "Ringing pat-
tern internal / external = external" is set in the common settings (see "Hold
(Enquiry Call)", Page 2.324).
The "Ringing pattern internal / external" setting is valid throughout the system.
Identifying the Origin of a Call
If an incoming call's CLIP number corresponds to numbering plan identifier E.164,
the system assumes that the call comes from the public network (see "Numbering
Plan Identifiers", Page 2.3).
If an incoming call's CLIP number corresponds to numbering plan identifier PNP,
the system assumes that the call comes from the PISN (see "Numbering Plan Iden-
tifiers", Page 2.3).
If the CLIP number's numbering plan identifier is unknown, the trunk group con-
figuration is used to decide whether the call is signalled internally or externally
(setting "NPI call unknown").
2.22 Identification Elements HBT_20321104_02/B0_en