Cisco 7000 SERIES PA 8 PORT T1 MC ADAPTER WITH CSU DSU 规格指南
1-4
Multichannel DS1/PRI Port Adapter Installation and Configuration
OL-3525-03
Chapter 1 Overview
Features
Note
T1 time slots on the multichannel DS1/PRI port adapter are numbered 1 to 24, instead of the zero-based
scheme (0 to 23) used with other Cisco products. This numbering scheme is to ensure consistency with
telco numbering schemes for T1 channels within channelized equipment.
scheme (0 to 23) used with other Cisco products. This numbering scheme is to ensure consistency with
telco numbering schemes for T1 channels within channelized equipment.
The multichannel DS1/PRI port adapter supports facilities data link (FDL) in Extended Superframe
(ESF) framing, as well as network and payload loopbacks. Bit error rate (BER) testing is supported on
each of the T1 links. The BER testing is done only over a framed T1 signal and can be run only on one
port at a time.
(ESF) framing, as well as network and payload loopbacks. Bit error rate (BER) testing is supported on
each of the T1 links. The BER testing is done only over a framed T1 signal and can be run only on one
port at a time.
The multichannel DS1/PRI port adapter does not support the aggregation of multiple T1s (called inverse
muxing or bonding) for higher bandwidth data rates. The multichannel DS1/PRI port adapter supports
Cisco HDLC, Frame Relay, PPP, and Switched Multi megabit Data Service (SMDS) Data Exchange
Interface (DXI) encapsulations over each T1 link. For SMDS only, DXI is sent on the T1 line, so it needs
to connect to an SMDS switch that has direct DXI input.
muxing or bonding) for higher bandwidth data rates. The multichannel DS1/PRI port adapter supports
Cisco HDLC, Frame Relay, PPP, and Switched Multi megabit Data Service (SMDS) Data Exchange
Interface (DXI) encapsulations over each T1 link. For SMDS only, DXI is sent on the T1 line, so it needs
to connect to an SMDS switch that has direct DXI input.
Features
The multichannel DS1/PRI port adapter has the following features and physical characteristics:
•
Transmits and receives data bidirectionally at the rate of 1.536 Mbps for each T1 port.
•
The individual T1 connections on the DSX-1 version of the multichannel DS1/PRI port adapter use
100-ohm RJ-48C cables to connect to external CSUs to a Multi-channel Interface Processor (MIP)
or to any other equipment that uses a DSX-1 interface.
100-ohm RJ-48C cables to connect to external CSUs to a Multi-channel Interface Processor (MIP)
or to any other equipment that uses a DSX-1 interface.
Note
External DSX-1 channels do not provide CSU functionality and must connect to an external
CSU for long-haul applications.
CSU for long-haul applications.
•
Supports RFC 1406—For information on accessing Cisco MIB files, refer to the Cisco MIB User
Quick Reference. For RFC 1406, Cisco supports all tables except the “Frac” table.
Quick Reference. For RFC 1406, Cisco supports all tables except the “Frac” table.
•
For wide-area networking, the multichannel DS1/PRI port adapter can function as a concentrator for
a remote site.
a remote site.
Note
The Catalyst RSM/VIP2, Catalyst 6000 family switches, VIP, and Cisco 7304 PCI Port
Adapter Carrier Card support online insertion and removal (OIR), but individual port
adapters do not. To replace the port adapters, you must first remove the Catalyst RSM/VIP2,
Catalyst 6000 family FlexWAN module, VIP, or the Cisco 7304 PCI Port Adapter Carrier
Card from the chassis and then replace port adapters as required. OIR is supported for port
adapters in the Cisco 7100 series, Cisco 7200 series, Cisco uBR7200 series routers,
Cisco 7301 routers, and Cisco 7401ASR routers.
Adapter Carrier Card support online insertion and removal (OIR), but individual port
adapters do not. To replace the port adapters, you must first remove the Catalyst RSM/VIP2,
Catalyst 6000 family FlexWAN module, VIP, or the Cisco 7304 PCI Port Adapter Carrier
Card from the chassis and then replace port adapters as required. OIR is supported for port
adapters in the Cisco 7100 series, Cisco 7200 series, Cisco uBR7200 series routers,
Cisco 7301 routers, and Cisco 7401ASR routers.
The DS1/PRI line interface unit (LIU) meets the following specifications for input jitter tolerance, pulse
shape/amplitude (T1 and DSX1), line termination, and jitter transfer (see
shape/amplitude (T1 and DSX1), line termination, and jitter transfer (see
•
ANSI 62411
•
Bellcore TR499
provides the T1 channel data rates for the multichannel DS1/PRI port adapter.