Configuring a T1 Port
Page 33-7
8) Loopback Mode
The loopback configuration for this port. Loopback configurations describe the relation
between the device attached to a
T1
port and the framing functionality within the
T1
port.
Framing functionality assembles
T1
frames into SuperFrames and Extended SuperFrames,
depending on how the port is configured. Possible values are as follows:
none
The port is not in a loopback state. This is the typical live network state for a
T1
port.
payload
The received signal at this
T1
port is looped out of the port after passing
through the port’s framing functionality. This state should only be used for
debugging purposes.
line
The received signal at this
T1
port does not go through the port’s framing func-
tionality, and is looped straight back out the port. This state should only be
used for debugging purposes.
inward
The transmitted signal from the
inward
side of this port is looped back inter-
nally. The signal passes through the
T1
framing functionality before looping
back. This state should only be used for debugging purposes.
9) Signaling
The type of signaling used on this port. Only the
none
and
CAS
(Channel Associated Signal-
ling) options are applicable to a circuit emulation service port. The
CCS
(Common Signal
Channeling) option is used with external
ISDN
Primary Rate ports. If you select the
CAS
option, then you are enabling robbed-bit signalling.
Robbed-bit signalling can be used with SuperFrames or Extended SuperFrames. In each
SuperFrame, the 6th and 12th frame may contain “robbed bit” (A, B) signalling, which means
the least significant bit is robbed from each time slot in the 6th and 12th frame and used for
signalling. In Extended SuperFrames, this robbed-bit signalling (A, B, C, D) occurs in the 6th,
12th, 18th, and 24th frames.
10) Trap Generation
Enables all of the
SNMP
-based traps related to T1 and E1 ports.
11) Yellow Alarm Detection
Specify the yellow alarm detection state for this port. A T1 port configured as SuperFrame
(SF) can produce false yellow alarms if a Layer 2 protocol like High-Level Data Link Control
(HDLC) is being used. Therefore, you can disable yellow alarm detection with this option. (A
T1 port set to Extended SuperFrame (ESF) will not produce false yellow alarms.)
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...