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Page 5-25
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(a) _ITEMP (UT Temperature)
(b) _ILOG (Retrieve UT log file)
(c) _ISLEEP (UT Sleep Mode Timeout)
(d) _IMETER (Call Metering)
(e) _ISIG (Signal quality indication)
(f) _IBALARM (Report the Alarm State of the Terminal)
(g) _IBNOTIFY (Control the sending of unsolicited result codes)
(h) _ICSEV (Circuit Switch Domain Event reporting ARINC 781 Attachment 5).
J. PIES AT Header Compression
(1) The PIESD enables/disables RFC 2507 IP Header Compression for each context on
Channel Card B for Non-Safety data.
(2) The PIESD applies RFC 2507 header compression if any of the following conditions are
true:
(a) the HCOMP parameter in +CGDCONT (PPPoE dial string) is not specified,
(b) the HCOMP parameter in +CGDSCONT (+AT side handler command) is not
specified,
(c) the HCOMP parameter in +CGDCONTor +CGDSCONT is set to 1 (on
manufacturer preferred compression),
(d) the HCOMP parameter in +CGDCONTor +CGDSCONT is set to 3 (RFC 2507).
(3) If the HCOMP parameter in +CGDCONT or +CGDSCONT is set to 0 (off - no
compression), the PIESD does not apply RFC 2507 header compression.
(4) The PIESD rejects the context definition if any of the following conditions are true:
(a) the HCOMP parameter in +CGDCONTor +CGDSCONT is set to 2 (on -
RFC1144 compression),
(b) the HCOMP parameter in +CGDCONTor +CGDSCONT is set to 4 (on-
RFC3095 compression).
K. NTP
(1) If configured on by ORT, the SDU is a NTP (Network Time protocol) Master on cabin side
Ethernet employing NTP v4.
L. FOIP
(1) The SDU does not provide any direct fax functionality, but can be invoked by user
equipment over data links provided.
M. Cabin Voice Communications
(1) Non-safety SBB does not have priority settings for voice calls, thus PIES voice calls are
all at public priority.
(2) The PIES attempts to route Air-to-Ground calls to the CS channel before using any PS
channels (VoIP).
(3) CS call setup messages are sent via the serial control link between the PIESD and the
Non-Safety Channel Card.
DRAFT
3rd rvw Draft as of:
29 January, 2020