Management Information Base; Line Card Slot Locations On The Supported Platform; Cisco 7304 Router Slot Numbering - Cisco 7304 Installation And Configuration Manual

Chapter 1 Overview
E3 systems are designed for cable lengths of 450 feet (137 meters) between the transmitter and the
DSX-3 demarcation point where the standard pulse mask must be met. From the DSX-3 point, another
run of 450 feet (137 meters) is allowed to the receiver, making a total of 900 feet (274 meters) between
transmitter and receiver. This limitation is due to signal attenuation in the cable.
Although the American National Standards Institute (ANSI) standard T1.404-1994 stipulates the
Western Electric or equivalent 728A SMB cable, it has been replaced by the Lucent (formerly AT&T)
734A cable. Cisco tested more than 900 feet (274 meters) of 734A SMB cable from transmitter to
receiver including the SMB-to-BNC adapter cables to verify high signal attenuation.
Table 1-4
coaxial cable attenuation. RG-179coaxial cable has a much higher attenuation, so take this information
into account if you plan long runs of RG-179 cable.
Table 1-4
Approximate Cable Attenuation, dB
Frequency
1 MHz
10 MHz
50 MHz
100 MHz
1. dB = decibels

Management Information Base

Management Information Base (MIB) attributes are readable and writable across the Integrated Local
Management Interface (ILMI) through use of the Simple Network Management Protocol (SNMP). The
6-port 6E3 line card supports the DS3 interface MIB (RFC 1407). For more MIB support information,
see the Cisco 7304 Router MIB Overview at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/core/cis7300/7304mibs/7300mib1.htm

Line Card Slot Locations on the Supported Platform

This section discusses line card slot locations on the supported platform.
summarizes slot location conventions on the Cisco 7304 router.

Cisco 7304 Router Slot Numbering

Figure 1-5 on page 1-8
and 1 and line cards installed in slots 2 through 4. In the Cisco 7304, slot 0 is in the lower left position,
and slot 5 is in the upper right position.
OL-5061-01
lists some approximate attenuation values from the ANSI standard, and shows the RG-179
ANSI Standard Cable-Attenuation Values
1
100 ft (30 meters) DSX-3 Point
450 ft (137 meters)
0.27 1.2
0.80 3.6
1.82 8.2
2.64 11.9
shows a Cisco 7304 with the network services engine (NSE) installed in slots 0
Cisco 7304 6-Port Clear Channel E3 Line Card Installation and Configuration
from ANSI Standard T1.404-1994
Transmitter-to-receiver
distance (max)
900 ft (274 meters)
2.4
7.2
16.4
23.8
Management Information Base
RG-179 Coaxial
Cable
100 ft (30 meters)
3.0
5.3
8.5
10.0
Figure 1-5 on page 1-8
1-7