Overview
The PSB 21911, IEC-Q TE Version 5.2, is a specific derivative of the PEB 2091, IEC-Q for terminal and small PBX applications. It features all necessary functions required for NTs and terminal applications like PC add-on cards and terminal adapters.

FEATUREs
• ISDN U-transceiver with IOM-2 and optional micro-
   processor interface
• Compatible to NT modes and TE mode of
   PEB 2091 IEC-Q V5.1
• Perfectly suited for terminal and TA applications
• U-interface (2B1Q) conform to ANSI T1.601, ETSI
   ETR 080 and CNET ST/LAA/ELR/DNP/822:
   – Meets all transmission requirements on all ANSI,
      ETSI and CNET loops with margin
   – Conform to British Telecom’s RC7355E
   – Compliant with ETSI 10ms micro interruptions
• IOM-2 interface for connection of e.g. ISAC-S,
   SICOFI-2/4TE, ARCOFI, ITAC, HSCX-TE, ISAR,
   IPAC, 3PAC
• Pin compatible to version 4.4 in the P-LCC-44
   package