Technical Reference for ZyXEL omni.net series
8-1
Chapter 8
V.110, V.120, X.75 and Synchronous Mode
ISDN Communications
This chapter describes how to set-up and configure your omni.net ISDN TA with the V.110, V.120,
and X.75 protocols. The following table summarizes the specifications of those ISDN protocols.
Synchronous
V.110
V.120
X.75
Layer 1
Transparent
80 Bits Framing
HDLC
HDLC
Layer 2
None
None LAPD LAPB
Layer 3
None None V.120
Transparent,
T.70
•
Error Control
No No Yes Yes
•
V.42bis
No No Yes Yes
•
Async or Sync
if used with
•
V-Series DTE
Sync
Async Only
Async Only
Async Only
Bundle
Yes (Note)
No Yes Yes
Max. Line Speed
64Kbps
128Kbps (Note)
Async: 38.4 Kbps
64Kbps
128Kbps
64Kbps
128Kbps
AT-Command
Configuration
ATB11&M1
(Sync Data)
ATB11&M3*I1
(V.25bis Sync
HDLC)
ATB10 ATB20 ATB00
Transparent
ATB01: T.70 NL
Table 42. Specifications of ISDN protocols
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
