4 Boards Nortel Secure Router 8012
Hardware Description
4-28 Nortel Networks Inc. Issue 5.3 (6 April 2009)
Table 4-28 Description of the indicators of channelized and unchannelized E1/T1 interface
modules
Indicator State and significance
LINK If the indicator is ON, the link is connected. If the indicator is OFF, the
link is disconnected.
ACT If the indicator is OFF, no data is being transmitted or received. If the
indicator is flashing, data is being transmitted or received.
0–3 (4E1/T1)
0–7 (8E1/T1)
E0–E15 (16E1/T1)
The indicators corresponding to the relevant
port number.
Table 4-29 shows the attributes of the channelized and unchannelized E1/T1 interface module.
Table 4-29 Attributes of the channelized and unchannelized E1/T1 interface modules
Description Attribute
4/8E1 4/8/16CE1 4/8CT1 16CT1
Connector type z DB-68 (4/8E1,4/8CE1 and 4/8CT1)
z DB-78 (16CE1 and 16CT1)
Operating
mode E1 E1 and CE1 T1 and CT1
Transmission
rate
z In E1 mode: 2048 kbit/s
z In CE1 mode: N x 64 kbit/s (N =
1 to 31)
z In T1 mode: 1544 kbit/s
z In CT1 mode: N x 56 kbit/s and
N x 64 kbit/s (N = 1 to 24)
Cable model 75 coaxial cable
120 shielded twisted pair cable
120 shielded twisted pair cable
Maximum
transmission
distance
75 coaxial cable: 0.5 km
120 shielded twisted pair cable 0.15
km
0.15 km
Interface
standard ITU-T G.703 and ITU-T G.704
Supported
network
protocol
IP
Other
supported
protocols
PPP, LAPB, X.25, Frame Relay, HDLC, and MP (16CE1/16CT1
supports PPP, HDLS, and MP.)