ISDN Software Reference for Linux and Windows
302
Type Description Values
T3xx
(T302, T303,
T304, T305, T306,
T308, T309, T310,
T312, T313, T318,
T319, T322)
Defines the Layer 3
timer values. See
Q.931 specification
and corresponding
switch specifica-
tions for exact
definitions and
default values for
these timers. Not all
timers are
applicable to all of
the switches.
Specified values are in 10 millisecond
increments. For example, a specified value
of 100 is equivalent to 1 second.
Possible values are:
• 0 = Default value for switch
• -1 = Default value for switch
• 0 < n < -1 = Timer value in tens of
milliseconds
NOTE: Incorrect or unreasonable timer
settings will result in undesirable effects to
calls as well as the call control stack. Before
overriding the default values, users needs to
understand the timer meanings and their
interdependencies.
6.4. DLINK
The DLINK data structure contains information about the data link information
block. The DLINK structure is passed for the cc_GetDLinkCfg( ),
cc_SetDLinkCfg( ), cc_GetDLinkState( ) and cc_SetDLinkState( ) functions.
The DLINK structure is used in the following structures:
• SPID_BLK, see Section 6.11. SPID_BLK
• TERM_BLK, see Section 6.12. TERM_BLK
• TERM_NACK_BLK, see Section 6.13. TERM_NACK_BLK
• USPID_BLK, see Section 6.15. USPID_BLK
The DLINK structure is defined as follows:
typedef struct
{char sapi;
char ces;
} DLINK, *DLINK_PTR;