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Procedure 21-2 To set transport bandwidth
Transport bandwidth and transport position are inter-related parameters, with transport
position taking priority. Changing the transport position may change the transport
bandwidth. See section 21.4 for details.
where
pp is 1 or 9, and c is 1 or 2, or A or B
n is 1 to 8
21.4
Transport position
Transport position defines the starting position of the data within the 64 kb/s channel.
There are eight possible starting position elements, identified as B7 to B0. The
2902 MainStreet system fills to the right of the starting element, with element B7
being the default setting.
When assigning more than one subrate transparent channel to the same channel, you
must arrange the starting elements and the transport bandwidth so that the data from
different devices do not overlap.
If you want to configure a number of circuits as a multidrop data bridge, you must
arrange the starting elements and the transport bandwidth to be the same. See
section 17.10 (for DNIC and 2B1Q modules), section 18.10 (for RS-232 DCMs) or
section 19.10 (for X.21 and V.35 DCMs).
Table 21-2 indicates the allowable transport position starting elements as determined
by the transport bandwidth.
2902 MainStreet Technical Practices
May 2002
90-2906-01
CONFIG — CIRCUIT— <pp-c> ↵ — FUNCTION — RATE_ADAPT
Table 21-2 Valid transport positions for transparent rate adaption
Transport bandwidth
64 kb/s (n = 8)
56 kb/s (n = 7)
48 kb/s (n = 6)
40 kb/s (n = 5)
32 kb/s (n = 4)
24 kb/s (n = 3)
16 kb/s (n = 2)
8 kb/s (n = 1)
21 — Transparent rate adaption
TRANS_BW
<n> ↵
Transport position
B7 only
B7 or B6
B7, B6, B5
B7 to B4
B7 to B3
B7 to B2
B7 to B1
B7 to B0
SK000520
21-5
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