Farallon Communications 612 用户手册

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Configuration using a Macintosh computer
5-11
V.120 Frame Type. The V.120 Frame Type pop-up menu lets you 
choose either I or UI as the V.120 frame type. Leave this set at I 
unless your system administrator or ISP instructs you to specify UI.
Enable Multilink PPP 
The Enable Multilink PPP area lets you enable and disable the 
modem’s Multilink PPP and dynamic bandwidth allocation features 
and define cer tain parameters for Multilink PPP. For more 
information, 
Enable Multilink PPP. Check the Enable Multilink PPP box to turn on 
the Multilink PPP feature. When Multilink PPP is on, the Netopia 
ISDN Modem can combine two B channels to allow up to 128 Kbps 
of data to pass through the ISDN line. You must enable this option 
in order to use the Dynamic Bandwidth Allocation feature.
Dynamic Bandwidth Allocation. Check the Dynamic Bandwidth 
Allocation box to turn on the Dynamic Bandwidth Allocation feature. 
When Dynamic Bandwidth Allocation is on, you can initiate a phone 
conversation after you have established a dual B channel 
connection. When you initiate the phone conversation, the modem 
disconnects one of the B channels and uses it for the voice call. For 
more information, 
Second DN. (This option is only available for the Netopia ISDN 
Modem Model 411.) If necessar y, enter a secondar y director y 
number (DN) in the Second DN field. The Second DN number is the 
second number of a destination you call. In most cases, you only 
need to enter a second director y number if your telephone company 
uses a switch other than an AT&T 5ESS switch or the destination 
you are calling does not have its ISDN lines organized in a hunt 
group. (A hunt group is a collection of phone lines that can be 
accessed by the same phone number.)