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Table 9-6. IMA specifications (continued)
Specification
Optional Specification O-30
Optional Specification O-31
Optional Specifications O-32 and
O-33
Compliance with ATM specifications
Table 9-7 details ATM specifications supported by the T1 and E1 modules.
Table 9-7. ATM specifications
Specification
UNI support
Virtual path (VP) and
virtual channel (VC)
connections
QoS types
Discard policies
HEC
Payload scrambling
Stinger® MRT Getting Started Guide
Configuring T1 and E1 Trunk Modules
Description
For loss of IMA frame (LIF), link out-of-delay
synchronization (LODS), remote failure
indicator (RFI)-IMA, and fault failures, the
user can specify the default checking time for
initiating an alarm condition, and the default
persistence time for retiring the alarm
condition.
Conforms with the test pattern procedure for
testing connectivity.
Supports the IMA MIB and SNMP-based
management.
Description
Compliant with ATM Forum specifications for UNI
3.0 and 3.1.
Supports up to 384 permanent virtual channels
(PVCs) per port and up to 384 PVCs per IMA
module.
Supports 255 permanent virtual paths (PVP) per
port. Up to 16 VPI's for VC switching can be
specified in the DS1-ATM profile or in the
IMA-Group profile.
Constant bit rate (CBR), variable bit rate (VBR)-real
time, VBR-nonreal time, and unspecified bit rate
(UBR)
Early packet discard (EPD), partial packet discard
(PPD), queue length exceeded.
Supports ITU I.432. Users have the option of
omitting the coset polynomial while calculating
HEC.
Can be configured by the user.
T1 and E1 module specifications
9-41
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