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STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
5
Transmits TTC JT-G704 multiframe formatted J1 signals. Supports the
alternate ESF CRC-6 calculation for Japanese applications.
Transmits the “Japanese Yellow” alarm.
Supports unframed mode and framing bit, CRC, or data link by-pass.
Provides signaling insertion, programmable idle code substitution, digital
milliwatt code substitution, and data inversion on a per channel basis.
Provides trunk conditioning which forces programmable trouble code
substitution and signaling conditioning on all channels or on selected
channels.
Provides minimum ones density through Bell (bit 7), GTE or DDS zero code
suppression on a per channel basis.
Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving
192-bit window and optionally stuffs ones to maintain minimum ones density.
Allows insertion of framed or unframed in-band loopback code sequences.
Allows insertion of a data link in ESF or T1DM (DDS) DS-1 modes.
Optionally inserts a datalink in the E1 national use bits.
Supports 4-bit codeword insertion in the E1 national use bits as specified in
ETS 300 233
Inserts up to three HDLC links into arbitrary time slots to support the D-
channel for ISDN Primary Rate Interfaces and the C-channels for V5.1/V5.2
interfaces.
Supports transmission of the alarm indication signal (AIS) and the Yellow
alarm signal. Supports “Japanese Yellow” alarm generation.
Provides ESF bit-oriented code generation.