Cisco VG30D, Руководство пользователя

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4-7
Cisco VG30D Voice Gateway User Guide
OL-19276-01
Chapter 4 Management and Configuration
Q.931 Configuration
•
Enable Diversion Service : This option allows the Cisco VG30D Voice Gateway to operate
Diversion Services.
• Diversion Validation response time : This option specifies the time (in seconds) that the Cisco
VG30D Voice Gateway will wait before autonomously generating a positive response to Diversion
Validation Request from the DPNSS PBX or network.
•
Enable Loop Avoidance Insertion : If option is enabled, the Cisco VG30D Voice Gateway will
insert a loop avoidance (LA) string containing the Number of Further Transits value in the outgoing
signalling.
•
Loop Avoidance mapping : If option is set to Simple the DPNSS LA value gets mapped directly to
the Q.931 transit Counter, but if option is set to Enhanced it gets treated as though it is passing
through a transit PBX before it is forwarded.
• Include Loop Avoidance in CRM : If the treatment of the LA results in the call clearing and this is
checked, the LA string will get included in the Clear Request Message that is generated by the Cisco
VG30D Voice Gateway.
•
En-bloc Call Forward Digit Count : You can use this option to turn overlap dialed DPNSS calls
into en-bloc calls. When the specified number of digits has been received, the call gets forwarded
en-bloc. Be aware that this is only appropriate for networks with fixed-length dial plans.
•
En-bloc Call Forward Timeout : This option acts as an interdigit timer that will forward the call
when it expires. It restarts as each digit arrives. This option proves suitable for networks with
variable-length dial plans, but introduces a post dial delay.
• Default Destination Address : You can use this field to provide a default destination address when
no dialed digits are received from the Q.931/QSIG PBX or network.
•
Number of leading Destination Digits to strip : You can use the Cisco VG30D Voice Gateway to
strip leading digits such as node numbers from the dialed number, if required.
• Enable Service Spoofing : If this option is enabled, Transfer Hold and Diversion Validation Service
may get spoofed on behalf of the Q.931 network. (The services must also be enabled.)
•
Three Party Working EEM Spoofing : When this option is enabled, the Cisco VG30D Voice
Gateway will generate EEM messages to resolve interaction between spoofed Transfer and ROP
services.
Q.931 Configuration
Basic Settings
Note
Any changes that are made to the basic settings will cause the Cisco VG30D Voice Gateway to
temporarily deactivate the Q.931 Port. A warning will be given that calls in progress will be lost, and
confirmation is requested before changes are submitted.
Options include the following:
• Activate Q.931 Port 1 : Checking this option puts the Q.931 port (Port 1) in service.
•
Layer 1 Framing : Select CRC4 or Double Frame layer 1 Framing.
•
Orientation : Select User or Network end for layer 2 framing to be the opposite of the connected
PBX or network.