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2-6 DS-1 configuration
Table 2-3
Channel ordering sequence
Time slot
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Line coding
Line coding for a DS-1 is bipolar alternate mark inversion (AMI)/2B1Q.
The 6X50AA DS-1 card supports zero code suppression (ZCS) line coding,
and the 6X50AB DS-1 card supports bipolar eight zero substitution (B8ZS)
or ZCS, with the following conditions:
General requirements for DS-1 zerio code supression are as follows:
297-2521-106 Standard 23.01 March 2001
D3/D4/ESF
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
—end—
ZCS coding format requires that the B-channels be used in the 64 kbit/s
restricted mode.
The B8ZS coding format provides a 64 kbit/s clear channel.
a maximum of 15 consecutive zero binary bits
a minimum average of 12.5% density of one binary bit over any 192
consecutive bits
(continued)
D2
19
13
23
11
14
2
18
6
22
10
16
4
20
8
24
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