3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual page 208

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HAPTER ONFIGURING
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ATH UILDER ODULES
Onhook Detection—Enables or disables on-hook detection. When you enable
on-hook detection, bandwidth is automatically reallocated based on detection of
an on-hook condition, as specified by the signaling type.
Signaling Type—The signaling application type: No Signaling, E&M/PLAR,
FXO-LoopStart, FXS-LoopStart, or FXO-GroundStart for DSX-1 CBR; R2 for E1 CBR.
You can only modify this field in structured voice mode. In this mode, you can
select any signaling application type except No Signaling. If you try to set the
Signaling Type to No Signaling in structured voice mode, you will get an error. In
structured/unstructured data modes, the Signaling Type defaults to No Signaling
and cannot be modified. Configured under Manage Card. Select E&M/PLAR to
configure for dynamic bandwidth allocation (DBA) over ISDN PRI.
DS0 Channels—The associated DSOs which have been assigned to the specified
ATM VC connection. All available DSO channels are automatically allocated in
unstructured mode. In structured mode, the DSO channels are bit-coded, with
each bit representing one DSO channel. You can assign DSO channels in
structured mode only. Channel conflicts within a T1/E1 port interface will result in
an error.
Configuring CBR Virtual Circuits for DBA The PathBuilder S700 supports two
types of dynamic bandwidth allocation (DBA): structured voice DBA and structured
data DBA. For details about how DBA works, see "DS0 Signaling and Dynamic
Bandwidth Allocation" in Chapter 4.
In structured voice DBA, the CBR software reads the stored signaling bits and
releases bandwidth when it detects an on-hook (idle) condition. To configure a
CBR virtual circuit for structured voice DBA, follow these basic steps:
1 Configure the CBR Port as follows:
Set the CBR Port Mode to Structured Voice. See "Configuring DSX-1 CBR or E1
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CBR Modules" earlier in this chapter for details about setting CBR port
parameters.
2 Configure the virtual circuit as follows:
Set the Mode to DBA.
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Set the Payload Size/Type to Voice.
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Set Onhook Detection to Enabled.
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Set the Signaling Type to E&M/PLAR,
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In structured data DBA, the CBR software reads the DSO payload bytes and
releases bandwidth when it detects an on-hook (idle) condition. To configure a
CBR virtual circuit for structured data DBA, follow these basic steps:
1 Configure the CBR port as follows:
Set the Port Mode to Structured Data. See "Configuring DSX-1 CBR or E1 CBR
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Modules" earlier in this chapter for details about setting CBR port parameters.
Set the DBA Bits Mask to mask off bits that you do not want to include in the
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idle code.
2 Configure the virtual circuit as follows:
Set the Mode to DBA.
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Set the Payload Size/Type to Voice.
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Set Onhook Detection to Enabled.
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ORTS AND PPLICATIONS