Dialogic DMG1000 Uživatelský manuál Strana 6

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Digital
Telephon e
Digital
Telephon e
Digital PBX
Serial Link
1-8
Digital
Phone
Lines
VoIP
Terminal
Device
VoIP
Terminal
Device
LAN
Master Gateway
1-N
Digital
Phone
Lines
Slave Gateways
DMG1000
(Phone Emulating)
DMG1000
(Phone Emulating)
Configuration
Configuration of serial protocol parameters is discussed in
detail in Section 3.5 of the Dialogic
®
1000 and 2000
Media Gateway Series Users Guide (see For More
Information) and context-sensitive help is provided in the
Web interface. Two DMG1000 serial protocol timing
parameters and their implications for CPID and MWI
processing are listed here (excerpted from the users
guide), addressing specific issues that may arise when
configuring a DMG1000 to use the desired serial
protocol.
MWI Response Timeout (Section 3.5.7)
Description: Specifies the time in milliseconds the media
gateway serial protocol Master will wait for a failed
response from the PBX before sending a success message
to a serial protocol Slave in response to a message MWI
request from the slave. This parameter is only required
when this media gateway is configured as the Serial
Protocol Master.
Allowed Values: 100 to 60000 milliseconds
Default Value = 2000 milliseconds
INI File Parameter Name = telSerMwiRspToutMs
Serial CPID Expiration (Section 3.5.9)
Description: Specifies the time in milliseconds that serial
CPID information received by a media gateway (Master
or Slave) remains valid. If the timeout expires before an
inbound call is received on the media gateway PBX port
indicated by the serial CPID information, the serial
CPID information is discarded.
Allowed Values: 100 to 60000 milliseconds
Default Value = 2000 milliseconds
INI File Parameter Name = telSerCpidExpMs
Call Party Identification (CPID)
This section discusses CPID information extraction from
serial protocol packets received by the DMG1000 and
subsequently included in VoIP packets (SETUP for
H.323/INVITE for SIP). The client DMG1000 units
register their logical extension numbers with the master
unit, so the master only sends serial protocol packets to
the units that need them.
Note that the syntax and less important fields in the serial
protocol packets contained in subsequent sections are not
addressed.
Application Note Dialogic
®
1000 Media Gateway Series Serial CPID Configuration and Timing
Figure 2. Typical Device Topology for Multiple DMG1000s
9086-02_DMG1000_CPDI_Config_an.qxd 6/13/07 2:04 PM Page 6
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