SM265B and SM267B

January 19, 2026

by Peter Szoke

TruePulse currently has one each of the SM265B and SM267B circuit boards available for sale. They are used pulls that have been tested.

The SM265B and SM267B are switching modules used in the 5ESS, a Class 5 switch develop by AT&T in the 1980s! Subsequently sold under Lucent, Alcatel-Lucent, and even Nokia brands. The 5ESS complements the 4ESS, a Class 4 switch.

SM265B has a HECI LMPQ04A, and comes with various Comcode options. SM267B has a HECI LMPQ04U, and also comes with various Comcode options.

In addition to the 5ESS, TruePulse buys and sells various other Lucent platforms, including the DDM-2000, the FT-2000, the Galaxy, the DACS IV and the Lambda Unite. Please let us know your interests.

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Canada

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