Specifications

Introducing the MGX 8220 Shelf 1-5
MGX 8220 System Overview
• ATM UNI Service Module for T1 (AUSM-4T1)
This card provides interfaces for up to four T1 lines, each of which can support one T1 ATM UNI
or ATM NNI.
• ATM UNI Service Module for E1 (AUSM-4E1)
This card provides interfaces for up to four E1 lines, each of which can support one E1 ATM UNI
or ATM NNI.
• ATM UNI Service Module for T1 (AUSM-8T1)
This card provides interfaces for up to eight T1 lines, each of which can support one T1 ATM
UNI or ATM NNI plus additional support for IMA.
• ATM UNI Service Module for E1 (AUSM-8E1)
This card provides interfaces for up to eight E1 lines, each of which can support one E1 ATM
UNI or ATM NNI plus additional support for IMA.
• Circuit Emulation Service Module for T1 (CESM-4T1)
This card provides interfaces for up to four T1 lines, each of which is a 1.544 Mbps unstructured
synchronous data stream.
• Circuit Emulation Service Module for E1 (CESM-4E1)
This card provides interfaces for up to four E1 lines, each of which is a 2.048 Mbps unstructured
synchronous data stream.
• Circuit Emulation Service Module for T1 (CESM-8T1)
This card provides interfaces for up to eight T1 lines, each of which is a 1.544 Mbps structured
or unstructured synchronous data stream.
• Circuit Emulation Service Module for E1 (CESM-8E1)
This card provides interfaces for up to eight E1 lines, each of which is a 2.048 Mbps structured
or unstructured synchronous data stream.
• Inverse Multiplexing for ATM Trunk Module—T3 to T1 (IMATM-8T1)
This card acts as an extension of the BPX BNI card and permits the BPX ATM trunk to be used
over multiple (up to 8) T1 lines instead of a single T3 line.
• Inverse Multiplexing for ATM Trunk Module—E3 to E1 (IMATM-8E1)
This card acts as an extension of the BPX BNI card and permits the BPX ATM trunk to be used
over multiple (up to 8) E1 lines instead of a single E3 line.
• Frame Relay Access Service Module (FRASM-8T1)
This card provides interfaces for up to eight T1 lines for the support of IBM SNA networks. Both
binary synchronous (BSC) and synchronous data link control (SDLC) protocols are supported.
• Service Resource Module (SRM-T1E1)
This card provides loopback and bit error rate testing (BERT) functions and 1:N redundancy for
the service modules.
• Service Resource Module (SRM-3T3)
This card provides loopback and bit error rate testing (BERT) functions and 1:N redundancy for
the service modules. Three T3 service lines are also provided to carry multiple T1 service lines
which are then mapped to T1 based service module slots and ports in the MGX 8220 shelf.
The ASC and the BNM modules must always be present in an MGX 8220 shelf and are referred to
as the core modules. The MGX 8220 shelf supports redundant core modules where one ASC/BNM
set is an active set and a second ASC/BNM is a standby set. In the event of a malfunction, the standby
set automatically takes over as the active set. The SRM is optional. If present, it is part of the core
card set, with switchover to the standby upon a malfunction of the active BNM or ASC.