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Chapter 7 Configuring ATM Trunking
Adding a Bearer VCC Identifier
7-18
255-700-447
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Fwd/Bwd MBS
(cells)
Default: 1/1
Range:
Format: Numeric
Specifies the forward and backward maximum burst size
(cells) for the connection.
Note:
This field is displayed only when the value in the
Service Type field is one of the following: Vbr-nrt2, Vbr-
nrt1, Vbr-rt2, Vbr-rt1, Vbr-express.
OAM Status
Default: Unsupp
Range: N/A
Format: Predefined
Specifies the OAM support used.
Unsupp
Indicates that OAM is not in use.
Wireless backhaul applications:
The CID range is 8 to 255
when OAM is unsupported.
GR-303/V.5 applications:
Select this value. Do not acti-
vate OAM; the feature is not available on AAL2 trunks to
IADs.
End-Pt
The PSAX system is used as a termination point for ATM
traffic. The OAM loopback test is supported for end-to-
end connections only.
Wireless backhaul applications:
Select End-Pt to enable
OAM for Std AAL2 SPVCs. However, these restrictions
apply: 1) the CE channel range is 32 to 255. In addition,
the CIDs for each CE channel are fixed. Channel 1 must
be CID 32, channel 2 must be CID 33, etc., up to 255
CIDs; 2) only
one
DS1 per AAL2 SPVC trunk (bearer
VCC) is allowed; 3) no OAM flows are sent toward the
ATM side. Instead, a proprietary OAM implementation
scheme is used; 4) only upstream interworking unframed
1s are supported. A configuration of an SPVC trunk,
OAM enablement, and trunk conditioning upstream
interworking is
not
supported; and 5) when LOS, AIS or
RDI is received on the CE port, the trunk is torn down
and AIS or RDI is sent to the far end.
VCC Conn Type Default: Svc
Range: N/A
Format: Predefined
Specifies the VCC connection type.
Svc
Switched virtual circuit.
Spvc
Software-switched permanent virtural circuit.
Wireless backhaul applications:
If the spvcGlobalPriori-
tyScheme field is enabled on the Call Control Resource
Allocation Configuration window, you must select Spvc
as the VCC Conn Type.
Pvc
Permanent virtural circuit.
Wireless backhaul applications:
If the spvcGlobalPriori-
tyScheme field is enabled on the Call Control Resource
Allocation Configuration window, you must select Spvc
as the VCC Conn Type.
Table 7-14. Field Descriptions for the ATM Trunking Bearer VCC Configuration Window
*
(Continued)
Field Name
Field Values
Description
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