Allied Telesis AT-S99 - Manual (Page 192)

Chapter 7: Configuring the T1/E1 Ports on the AT-CM70S Media Converter Line Card
192
Selecting the Management Method for the T1/E1 Ports
The parameter settings for the four T1/E1 ports on the AT-CM70S Line
Card can be configured through the management software on the
AT-CV5M02 Management Card or through the Console port on the card
itself. However, since the card is unable to support both methods at the
same time, you have to choose which management method you intend to
use and specify the method during the initial configuration of the card.
This is referred to as setting the card’s UART (universal asynchronous
receiver/transmitted) setting. The card has two settings—UART local
console mode and UART backplane mode. The UART local console mode
lets you configure the T1/E1 ports from the Console port on the card. This
setting, which happens to be the default setting for the UART parameter,
is the appropriate setting for an AT-CM70S Line Card that is installed in a
chassis that doesn’t have a management card.
If the card will be installed in a chassis that has a management card, you
should change the management method of the ports to the UART
backplane mode. This will allow you to configure the T1/E1 ports using the
menus in the management software of the management card. You’ll be
able to configure these ports much as you can any of the other ports on
the card. (The term “backplane” refers to the backplane in the AT-CV5000
Chassis.)
There are a couple of other factors that need to be considered when
choosing the UART setting for this card. The AT-CM70S Line Card
supports the remote peer management feature for the 10/100/1000Base-T
Ethernet port and the SFP slot, but not for the T1/E1 ports. So even if you
configure this card for remote peer management, you will not be able to
configure the T1/E1 ports on a remote card through that feature.
The AT-CM70S Line Card is a multiplexer that combines the data streams
from one 10/100/1000Base-T Ethernet port and four T1/E1 lines onto a
single SFP fiber optic port. As such, it has to be used in pairs. However,
the cards do not need to have the same UART settings. In fact, they’ll
have different settings because one of the cards will probably reside in the
AT-CV5000 Chassis with a management card and the other at a remote
site in a chassis that does not have a management card.
Figure 82 illustrates the idea of the UART setting. It shows a deployment
of two AT-CM70S Line Cards and their UART settings. The UART setting
of the line card in the AT-CV5000 Chassis is set to UART backplane mode
so that the T1/E1 ports on the card can be managed through the
management card in the chassis. In contrast, the UART setting of the card
at the remote site is set to UART console mode so that the T1/E1 ports
can be managed through the card’s Console port at the site. If the card at
the remote site had a UART setting of UART backplane mode, you would
have to remove the card from the chassis and install it into another unit