4 Boards Nortel Secure Router 8012
Hardware Description
4-30 Nortel Networks Inc. Issue 5.3 (6 April 2009)
4.8.3 Interface attributes
Table 4-32 shows the attributes of the channelized E3 interface module.
Table 4-32 Attributes of the channelized E3 interface module
Description Attribute
1CE3
Connector type SMB
Cable type 75-ohm coaxial cable
Operating mode E3, CE3, and CE1
Interface rate z E3 mode: 34.368 Mbit/s
z CE3 mode: 16 E1 channels with a rate of 2.048 Mbit/s per
E1 channel
z CE1 mode: N x 64 kbit/s (N = 1 to 31)
Max. transmit distance 0.1 km
Interface standard ITU-T G.703 and G.704
Supported network
protocol IP
Other supported
protocols PPP, MP, Frame Relay, Multiple Frame Relay (MFR), and
HDLC
There is one type of synchronous serial interface module for the Secure Router 8012: the
4-port enhanced high-speed synchronous serial interface card (4SAE).
4.9.1 Functions
The 4SAE supports the synchronous working mode. Its main function is to receive, send, and
process the synchronous serial data flow and to support the modes of Data Terminal
Equipment (DTE) and Data Circuit-terminating Equipment (DCE).
The functions of the interface are as follows:
z supports local loopback
z automatically identifies the V.35 and V.24 cables
z supports various link layer protocols, such as PPP, Frame Relay, and HDLC