STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
• 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.
PROPRIETARY AND CONFIDENTIAL
5
PMC [ PMC-SIERRA, INC ]
