Enterasys csx5500 用户指南
USER’S GUIDE
126 CyberSWITCH
decibel value of 0.0 (meaning no attenuation). If the distance is much closer (for example, 1000 ft.),
the decibel value may be -15.0 (i.e., the signal is strong enough that it needs a certain amount of
attenuation).
the decibel value may be -15.0 (i.e., the signal is strong enough that it needs a certain amount of
attenuation).
L
INE
T
YPE
For V.35 and RS232 lines only. This parameter differentiates the network connections from
connections to local computing devices. The network line type should be specified for lines that will
be used by a Dedicated, Frame Relay, or X.25 Access.
connections to local computing devices. The network line type should be specified for lines that will
be used by a Dedicated, Frame Relay, or X.25 Access.
D
ATA
L
INE
I
DLE
C
HARACTER
This identifies the idle character which is transmitted by the CyberSWITCH between the HDLC
frames. The character choices are marks (all ’1’s) or HDLC flags (hexadecimal ’7E’), with marks
being the default. In most situations, the default value is acceptable, as the receiving side should
able to identify the start of a new frame after reception of either idle character. However, there may
be some receiving devices which cannot properly make this determination with the default of idle
marks. If communication cannot be established with the receiving device, you may need to take
care that the idle character is set to a value that the receiving device will understand. For example,
CISCO devices require the flag data line idle character.
frames. The character choices are marks (all ’1’s) or HDLC flags (hexadecimal ’7E’), with marks
being the default. In most situations, the default value is acceptable, as the receiving side should
able to identify the start of a new frame after reception of either idle character. However, there may
be some receiving devices which cannot properly make this determination with the default of idle
marks. If communication cannot be established with the receiving device, you may need to take
care that the idle character is set to a value that the receiving device will understand. For example,
CISCO devices require the flag data line idle character.
COMMPORT I
NFORMATION
For systems using the asynchronous management port (COMMPORT) for out-of-band
management. These elements control how the port will function. Elements include:
•
management. These elements control how the port will function. Elements include:
•
modem name
•
baud rate
•
data bits
•
stop bits
•
parity value
•
flow control type
•
mode of operation
Mode of operation determines whether this port operates in autosense mode or terminal mode.
offers the flexibility to use this port for console access, or to send PPP-async data.
For console access, the remote user must press <Enter> or <Return> four times upon call
connection. If no carriage returns are detected, the CyberSWITCH assumes it will receive PPP data.
connection. If no carriage returns are detected, the CyberSWITCH assumes it will receive PPP data.
Terminal mode requires no interaction. It automatically sends the attached device a login prompt
for console access.
for console access.
L
INE
B
ACKGROUND
I
NFORMATION
Lines are communication facilities from the carriers. These lines directly attach to the system. From
the system perspective, lines provide the physical connection to switched networks. Lines are not
required for LAN connections.
the system perspective, lines provide the physical connection to switched networks. Lines are not
required for LAN connections.
Lines must be configured for BRI resources and PRI resources. For PRI resources, the
CyberSWITCH supports both T1 lines (used in North America, Australia and Japan) and E1 lines
(used in Europe, Mexico, South America, Korea). To specify the type of line as either T1 or E1, you
need to set a hardware switch on the PRI resource itself. (See
CyberSWITCH supports both T1 lines (used in North America, Australia and Japan) and E1 lines
(used in Europe, Mexico, South America, Korea). To specify the type of line as either T1 or E1, you
need to set a hardware switch on the PRI resource itself. (See
in the Hardware
Installation chapter.)
When configuring PRI lines, you will need to specify framing type, line coding type, and T1
signaling method. Refer to the
signaling method. Refer to the
section, which describes these characteristics.