Riverstone Networks WICT1-12 - Manual (Page 643)

Riverstone Networks RS Switch Router User Guide Release 8.0 30-39
WAN Configuration Clear Channel T3 and E3 Services Overview
30.17 CLEAR CHANNEL T3 AND E3 SERVICES
OVERVIEW
Clear Channel T3 and E3 utilizes the full DS3 bandwidth for data transmission as shown in Table 30-4 .
30.17.1 Clear Channel T3 and E3 Service Interface Module
Each Clear Channel T3 and E3 WAN Interface Card (WIC) has one port, and an internal CSU/DSU. The WICs have
a BNC connector Transmit/Receive pair. Two T3 or E3 WICs, or a T3 and an E3 WIC, can be installed in a Multi-Rate
WAN module, giving a total of two ports.
Framing and line coding schemes are employed to ensure the reliable transmission of the data; the schemes used
depend on the interface, as shown in
Table 30-5 .
Table 30-4 Clear Channel T3 and E3 Interface Rates
Interface Capacity (Mbps)
T3 44.736
E3 34.368
Table 30-5 Clear Channel T3 and E3 Framing and Line Coding
Interface Framing Line Coding
T3 • C-bit
• M23
• Bipolar 3 zero substitution
(B3ZS)
E3 • G751 Framing
• G832 Framing
• High-density bipolar 3 (HDB3)