Cisco 7000 SERIES PA 8 PORT T1 MC ADAPTER WITH CSU DSU Specification Guide
1-3
Multichannel DS1/PRI Port Adapter Installation and Configuration
OL-3525-03
Chapter 1 Overview
Multichannel DS1/PRI Overview
Multichannel DS1/PRI Overview
When you are running channelized T1, each DS1 interface can provide up to 24 T1 channel groups,
which are numbered from 0 to 23. Each channel group provides up to twenty-four 64-kbps time slots
(DS0 channels), which are numbered 1 to 24. Multiple time slots can be mapped to a single channel
group. Each channel group is presented to the system as a serial interface that can be configured
individually. Usable bandwidth for each channel group is calculated as n x 56 kbps or n x 64 kbps,
where n is a number of DS0 time slots (1 to 24).
which are numbered from 0 to 23. Each channel group provides up to twenty-four 64-kbps time slots
(DS0 channels), which are numbered 1 to 24. Multiple time slots can be mapped to a single channel
group. Each channel group is presented to the system as a serial interface that can be configured
individually. Usable bandwidth for each channel group is calculated as n x 56 kbps or n x 64 kbps,
where n is a number of DS0 time slots (1 to 24).
Note
The Catalyst 6000 family FlexWAN module does not support ISDN.
When you are running ISDN PRI, each DS1 interface provides 23 bearer (B) channels that can transmit
and receive data at the rate of 64 kbps, full-duplex, and one data (D) channel that can transmit and
receive data at the rate of 16 kbps, full-duplex. The B channels are used for transmitting user data. The
D channel is used for call setup control and network connection teardown, and provides the
communication from the router to the ISDN switch. The B and D channels are presented to the system
as serial interfaces that support High-Level Data Link Control (HDLC) and Point-to-Point Protocol
(PPP) encapsulation. The multichannel DS1/PRI port adapter supports dial-on-demand routing (DDR)
when you are running ISDN PRI.
and receive data at the rate of 64 kbps, full-duplex, and one data (D) channel that can transmit and
receive data at the rate of 16 kbps, full-duplex. The B channels are used for transmitting user data. The
D channel is used for call setup control and network connection teardown, and provides the
communication from the router to the ISDN switch. The B and D channels are presented to the system
as serial interfaces that support High-Level Data Link Control (HDLC) and Point-to-Point Protocol
(PPP) encapsulation. The multichannel DS1/PRI port adapter supports dial-on-demand routing (DDR)
when you are running ISDN PRI.
Each of the T1 channels on the multichannel DS1/PRI port adapter uses a portion of the T1 bandwidth
(fractional T1) or the entire T1 bandwidth for data transmission. Usable bandwidth for each T1 is n x 64
or n x 56 kbps, where n is a number from 1 to 24. When you are not running at full T1 speeds, the unused
portion of the T1 bandwidth cannot be used and is filled with idle channel data.
(fractional T1) or the entire T1 bandwidth for data transmission. Usable bandwidth for each T1 is n x 64
or n x 56 kbps, where n is a number from 1 to 24. When you are not running at full T1 speeds, the unused
portion of the T1 bandwidth cannot be used and is filled with idle channel data.
Cisco uBR7246 routers
•
PA-MC-2T1
•
PA-MC-4T1
•
PA-MC-8T1
•
PA-MC-8DSX1
Cisco 7301 routers
•
PA-MC-8T1
•
PA-MC-8DSX1
Cisco 7304 PCI Port Adapter Carrier Card in Cisco
7304 routers
7304 routers
•
PA-MC-2T1
•
PA-MC-4T1
•
PA-MC-8T1
•
PA-MC-8DSX1
Cisco 7401ASR routers
•
PA-MC-8T1
•
PA-MC-8DSX1
VIP in Cisco 7000 series or Cisco 7500 series routers
•
PA-MC-2T1
•
PA-MC-4T1
•
PA-MC-8T1
•
PA-MC-8DSX1
Table 1-1
Port Adapters Supported by Each Platform (continued)
Platform
Supported Port Adapters