ZyXEL Communications omni.net Plus - Manual (Page 89)

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