Table of Contents
Advertisement
S
PECIFICATIONS AND
WAN I
NTERFACE
ADSL (Asymmetric Digital Subscriber Line)
Maximum transmission rate:
Downstream
Upstream
Minimum transmission rate to sync
Rate-adaptive data rate resolution
Signal Format
Connector
ATM (Asynchronous Transfer Mode)
ATM Adaptation Layer
ATM Layer
Cell Format
Virtual Circuit type
Maximum Virtual Circuits
Megabit Modem 500L Installation Manual
S
PECIFICATIONS
1.5 Mbps
512 kbps
64 kbps
32 kbps increments
DMT (Discrete Multitone) line code
RJ-11
AAL5 (ITU I.363.5) - Supports encapsulation and
de-encapsulation of AAL5 Protocol Data Units (PDUs) for
convergence. Segmentation and Reassembly (SAR) layer
segments and reassembles AAL5 PDUs into ATM cells that are
48-byte SAR-PDUs.
Attaches or strips the 5-byte header to the 48-byte SAR-PDU.
Performance is a maximum line rate of 17,812 cells per second
downstream and 2,189 cells per second upstream.
Format complies with ITU I.361 ATM cell format. Cell delineation
complies with ITU I.432 Cell Delineation and HEC. Cells are fixed
length (53 bytes), including 5 bytes of header and 48 bytes of
payload. Included in the header are the VPI and VCI number.
Permanent Virtual Circuit (PVC) per ATM forum UNI version 3.1.
Three virtual circuits, with one that is actively connected to a
service provider; encapsulated as PPP.
A
D
ATA
61
Advertisement
Table of Contents
Troubleshooting
