Avaya Configuring WAN Lines Services Manual de usuario Pagina 118

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Configuring WAN Line Services
5-6
308648-14.00 Rev 00
Setting the Transmission Interface
You can select the appropriate MIB for the local management interface (LMI) to
use, provided you enable LMI and configure SMDS or frame relay on the HSSI
interface. Select one of the following MIBs, depending on the carrier services that
the attached DCE provides:
DS1, at 1.54 MB/s (specified by RFC 1233)
DS3, at 44.736 MB/s (specified by RFC 1232)
The HSSI driver enables the DS1 MIB by default, but provides no support for
either the DS1 or DS3 MIB. Rather, the external DCE (for example, a DL3200
SMDS CSU/DSU from Digital Link) may provide MIB support.
Using the BCC
To select a MIB, navigate to the hssi prompt (for example,
box
;
hssi/2/1
)
and type:
media
variable
For example:
hssi/2/1#
media dsone
hssi/2/1#
media dsthree
Using Site Manager
See the Transmission Interface parameter on page A-15 for information.
Setting the External Clock Speed
The HSSI specification requires that the DCE provide a transmit clock that times
data transfer across the DTE/DCE interface. The External Clock Speed parameter
specifies the bandwidth that the HSSI channel provides.
The External Clock Speed value does not affect hardware initialization. Certain
routing protocols use this parameter value for route selection.
You can set the external clock speed to a rate from 307200 to 52638515 bytes.
Select a value equal or close to the data transmission rate across the HSSI. By
default, the HSSI clock rate is 46359642 (44.736 MB/s).
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