STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
3
Supports line and path performance monitoring according to AT&T and ANSI
specifications. Accumulators are provided for counting ESF CRC-6 errors,
framing bit errors, line code violations and loss of frame or change of frame
alignment events.
Provides ESF bit-oriented code detection and an HDLC/LAPD interface for
terminating the ESF facility data link.
Supports polled or interrupt-driven servicing of the HDLC interface.
Extracts the data link in ESF and T1DM (DDS) modes. Optionally extracts a
datalink in the E1 national use bits.
Extracts 4-bit codewords from the E1 national use bits as specified in
ETS 300 233
Extracts up to three HDLC links from arbitrary time slots to support the D-
channel for ISDN Primary Rate Interfaces and the C-channels for V5.1/V5.2
interfaces.
Detects the V5.2 link identification signal.
Provides a two-frame elastic store buffer for backplane rate adaptation that
performs controlled slips and indicates slip occurrence and direction.
Provides DS-1 robbed bit signaling extraction, with optional data inversion,
programmable idle code substitution, digital milliwatt code substitution, bit
fixing, and two superframes of signaling debounce on a per-channel basis.
Frames to the E1 signaling multiframe alignment when enabled and extracts
channel associated signaling. Alternatively, a common channel signaling data
link may be extracted from timeslot 16.
Can be programmed to generate an interrupt on change of signaling state.
Provides trunk conditioning which forces programmable trouble code
substitution and signaling conditioning on all channels or on selected
channels.
Provides diagnostic, line loopbacks and per-DS0 line loopback.
Provides an integral pattern detector that may be programmed to detect
common pseudo-random sequences. The programmed sequence may be
detected in the entire frame, or on an NxDS0 basis.