Medias Mediatrix 1204, Справочное руководство

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Calling Issues Reference Manual (SIP Version)
Mediatrix 1204 283
D
ESCRIPTION
: Cannot make or receive calls.
P
OSSIBLE
C
AUSE
: There may be calls that have not been properly terminated, which causes a “leak” in
the system.
S
OLUTION
: You can enable the SIP Context Snapshot time feature. This feature is used to find if there
are improperly terminated calls. This could help to debug the system.
a. In the syslogMIB , set the syslogMsgMaxSeverity variable to debug .
b. Configure and enable the syslog feature.
c. In the sipDebugMIB , set the time, in minutes, between snapshots in the
sipDebugContextSnapshotTime variable.
The list of contexts currently in use are periodically output as debug-level syslog messages.
Note that enabling this feature will also trigger an instant snapshot.
To disable the feature, set this variable to zero (0).
Note that this feature will generate more syslog traffic, about 20 messages at each x minutes.
D
ESCRIPTION
: Unable to establish a call from the Mediatrix 1204 to a user agent such as an IP phone, a
gateway or another access device.
P
OSSIBLE
C
AUSE
: When the Mediatrix 1204 – with its T.38 capability enabled – tries to establish a call
with a user agent that does not support T.38, this user agent rejects the call instead of ignoring the
capability it does not support, i.e., T.38.
S
OLUTION
: Disable the T.38 capability in the Mediatrix 1204. See “T.38 Fax” on page 217 for more
details.
D
ESCRIPTION
: Call fails on a FXO line.
P
OSSIBLE
C
AUSE
: When making a call on a FXO line that has been previously detected and considered
available, the call fails. This may happen if a failure occurs on this line.
S
OLUTION
: Check that:
• The SCN line cord is properly connected to the FXO connector of the Mediatrix 1204.
• The SCN line cord is not cut or otherwise damaged.
• The CO line works properly.
D
ESCRIPTION
: When making calls, the DTMF detection does not work properly.
P
OSSIBLE
C
AUSE
: Limitations in the Mediatrix 1204 analog to digital (input) gain may cause DTMF
detection problems.
S
OLUTION
: The problem is country-specific. See “Input Sound Level Limitations” on page 212 for details
on how to solve it.
D
ESCRIPTION
: When making calls, the voice quality is not good.
P
OSSIBLE
C
AUSE
: Limitations in the Mediatrix 1204 analog to digital (input) gain may cause voice quality
problems.
Note:
This feature is currently located under the mediatrixExperimental branch of the MIB structure. See
“MIB Structure” on page 111 for more details.