Timeslots; Yellow Alarms - Extreme Networks WM-4T1i WAN Installation And User Manual

Configuring the WAN Physical Link
send an SNMP alert to the SMMi in the switch when red, yellow, or blue alarms are
detected. If the module is configured to send SNMP alerts, and the switch is configured
to send SNMP trap messages, then the switch will send a message to any SNMP trap
receivers that have been configured. To configure SNMP trap receivers, and for more
information about configuring SNMP in ExtremeWare, see the ExtremeWare Software
User Guide.
The module can also be configured not to send an SNMP alert to the SMMi. Any red,
yellow, or blue alarms will not be reported to the SNMP trap receivers. The default
value for SNMP alerts is enabled. To configure whether SNMP alerts are generated from
WAN alarms, use the following command:
config ports <portlist> [t1 | e1 | t3] snmp alert [enable | disable]

Timeslots

The E1 signal is divided into thirty-two timeslots, numbered 0 through 31. The first
timeslot (0) is reserved and cannot be used to transmit data. The timeslot numbered 16
is often used for voice phone calls in installations that combine voice and data. For
installations that use the full E1 bandwith for data communications, you will not need
to configure which timeslots are used. For installations that do not use the total E1
bandwith, your E1 provider will tell you which timeslots to use.
To configure which timeslots to use for your E1 link, use the following command:
config ports <portlist> e1 timeslots <timeslots>
A timeslot list uses a dash to represent a range of numbers and a comma to separate
single numbers or ranges. Valid timeslots range from 1 to 31. For example, to specify
timeslots 1 through 15 and 17 through 31 for the E1 port 1 on slot 4, use the following
command:
config ports 4:1 e1 timeslots 1-15,17-31

Yellow Alarms

A yellow alarm occurs on a device when its signal is not received at the remote end. It
is also called a Remote Alarm Indication (RAI). You can disable detection and
generation of yellow alarms for a T1 port. When SF framing is used, yellow alarm
detection and generation should be set to off, because detection of yellow alarms is not
reliable when data traffic is transmitted with SF framing (data traffic often contains bit
combinations that do not occur for encoded voice traffic). The default value for yellow
2-6 WAN Module Installation and User Guide