Emulators/Protocol Analyzers Selection:
|Name: 4957A Protocol Analyzer|
|Product Number: 4957A|
|Division: Colorado Telecommunications|
|Original Price: Unknown|
|Catalog Reference: 1992, page 599|
The 4957A replaced the 4951C and 4952A in 1991. The 4957A handled the same protocols as the older machines, as well as IPARS and ISND.^ TOP
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