Extreme Networks ExtremeWare 7.7, Command Reference Manual

Page: 2190 / 2620

2190 ExtremeWare 7.7 Command Reference Guide
T1, E1, and T3 WAN Commands—Alpine 3800 Series Platforms
configure ports t1 fdl
configure ports <portlist> t1 fdl [off | att | ansi]
Description
Configures facility data link (FDL) for T1 links.
Syntax Description
Default
FDL is off.
Usage Guidelines
Facility data link (FDL) for T1 links uses twelve bits in the ESF frame to signal information about line
and connection status. Since FDL is only meaningful for ESF framing, FDL settings are ignored when a
port is configured for SF framing.
The two T1 standards supported for FDL are ATT, described by the ATT 54016 specification, and ANSI,
described by the T1.403 standard.
Example
The following command enables ATT FDL on four T1 links:
configure ports 4:1-4:4 t1 fdl att
History
This command was first available in ExtremeWare v6.1.5w2.01WAN technology release.
This command was subsequently incorporated into ExtremeWare 7.0.0.
Platform Availability
This command is available on the Alpine 3800 series platform, when a WAN module is installed.
portlist A list of ports.
att Specifies ATT 54016 FDL.
ansi Specifies T1.403 FDL.