Features
558
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
9. 10. 3
External messaging and alarm systems
External messages in Short Message format (SM) are signalled to the PBX by an SM
server (e.g. IMS: Integrated Message Server) via the Ethernet interface using the
SMPP protocol logged in the communication server.
The ATAS protocol is used for the external alarms of an alarm server. The alarms are
routed directly to the corresponding destination terminal. Storage locations for
alarms are available for each terminal.
External messages and external alarms are handled differently in the communica-
tion server.
9. 10. 3. 1
Message handling
External and internal messages are first sent to the SMSC (Short Message Service
Centre), which then forwards the messages to the corresponding destination
phone. The SMSC is a software package integrated in the communication server
that is responsible for the flow of messages within the communication server.
Up to 16 messages can be buffered for each phone. Undeliverable messages (e.g.
phone memory full) are buffered in the SMSC (up to 400 messages). Overflow of
the phone memory is signalled accordingly on the display of the system phone. A
new attempt at delivering buffered internal messages is made after a configurable
resend period. The messages are definitively deleted once the validity period,
which is also configurable, has expired. With external messages the validity period
is usually also transmitted. If not, the internal setting is also used. The resend period
for external messages is always one quarter of the validity period.
AMS can be used to delete all pending messages or messages that are more than
three days old on all system phone (see
).
The SMSC is configured using the AMS Configuration Manager:
Tab. 375 SMSC settings
If the external message server is capable of handling short messages (SMS), then it
is an ESME (External Short Message Entity). An ESME always communicates with
Parameter
Remarks
SMSC port
The address is used for incoming messages of an external message server.
Retransmission period
Applies only to internal messages. For external messages the resend
period is always one quarter of the validity period.
Validity period
It is only used for external messages if a validity period was not transmitted
along with the message.