Enterasys Networks CSX7000 User Manual download pdf (Page 251)

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Central Site Remote Access Switch 251

ONFIGURING

LTERNATE

CCESSES

X.25 Accesses

NONSTANDARD DEFAULT TRANSMIT WINDOW SIZE

The number of frames that a DTE can send without receiving an acknowledgment. Using

modulo 128, the DTEs can send up to 127 frames without receiving an acknowledgment.

Using modulo 8, the DTEs can send up to 7 frames without receiving an acknowledgment.

The default value for both modulo 8 and modulo 128 is 2.

ONSTANDARD DEFAULT RECEIVE WINDOW SIZE

The number of frames that a DTE can receive without receiving an acknowledgment. Using

modulo 128, the DTEs can receive up to 127 frames without receiving an acknowledgment.

Using modulo 8, the DTEs can send up to 7 frames without receiving an acknowledgment.

The default value for both modulo 8 and modulo 128 is 2.

ONSTANDARD DEFAULT TRANSMIT PACKET SIZE

The size of a packet that a DTE can transmit. The choice of a packet size must be weighed

against the requirements for larger buffers at all the machines that process the packet.

Larger packet sizes reduce the opportunity for other devices to share the channel. On the

other hand, a larger packet reduces the ratio of overhead fields to user data. The default

transmit packet size is 128 bytes.

ONSTANDARD DEFAULT RECEIVE PACKET SIZE

The size of a packet that a DTE can receive. The choice of a packet size must be weighed

against the requirements for larger buffers at all the machines that process the packet.

Larger packet sizes reduce the opportunity for other devices to share the channel. On the

other hand, a larger packet reduces the ratio of overhead fields to user data. The default

transmit packet size is 128 bytes.

ONSTANDARD DEFAULT TRANSMIT THROUGHPUT CLASS

Transmit throughput describes the maximum amount of data that can be sent through the

network, when the network is operating at saturation. Factors influencing throughput are

line speeds, window sizes, and the number of active sessions in the network. The default

value is 19,200 BPS.

ONSTANDARD DEFAULT RECEIVE THROUGHPUT CLASS

Receive throughput describes the maximum amount of data that can be received through

the network, when the network is operating at saturation. Factors influencing throughput

are line speeds, window sizes, and the number of active sessions in the network. The

default value is 19,200 BPS.

X.25 C

HARGING-RELATED FACILITIES

These facilities are used to place charging-related restrictions upon incoming and outgoing X.25

calls.

NCOMING CALLS REVERSE CHARGING

This parameters allows you to choose whether the DTE (the CyberSWITCH) should accept

incoming X.25 calls that request reverse charging. The default configuration is to not allow

incoming X.25 calls to request reverse charging.

UTGOING CALLS REVERSE CHARGING

This parameters allows you to choose whether the DTE (the CyberSWITCH) should be able

to request reverse charging for outgoing calls. The default configuration is to not allow

outgoing X.25 calls to request reverse charging.

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