1104003L3
DDS:DS0DP
 Logic test access; Switched 56 tandem
1109003L1
 Digital Signal Zero Dataport; Used to cross connect DDS circuits
1109003L2
 Intelligent DS0 DP dataport for ADTRAN 1900/2300 and other WECo compatible D4 channel banks and SLC 96 terminals. Provides interface between one DS0 channel of the channel bank T1 carrier, and the standard D4 DS0 4-wire central office signal. Performance Monitor options interface with ADTRAN PM channel bank (1900/2300) controller.
1433003L1
 DDS:DS0DP
1123003L1
 T-carrier interface. DDS and SW56 cross connect. Error correction. Protected loopback: L3. Logic test access
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