ZyXEL Communications omni series Benutzerhandbuch
60 V.120 ISDN Communications
Speeds of 128Kbps
BRI ISDN consists of three (2B+D) logical channels. Each B channel
can be used independently for a dial-up connection running at
56Kbps or 64Kbps (bits per second).
can be used independently for a dial-up connection running at
56Kbps or 64Kbps (bits per second).
The two B channels can be used together for a single data connection
to provide 112K (with In-Band Signaling) or 128K (when Out-of-
Band Signaling is used). It is called a “Bundle Connection”.
to provide 112K (with In-Band Signaling) or 128K (when Out-of-
Band Signaling is used). It is called a “Bundle Connection”.
The type of channel bundling described in the V.120 section is
supported only between the following ZyXEL products: omni.net
series, Omni TA128, or Elite 2864I, and uses Multiple Link Protocol
(MLP) and “cFos” channel bundling (CCB).
supported only between the following ZyXEL products: omni.net
series, Omni TA128, or Elite 2864I, and uses Multiple Link Protocol
(MLP) and “cFos” channel bundling (CCB).
Identifying your line provisioning
For bundled connections, the two B channels of your ISDN line must
be able to handle data circuit switch connections with unrestricted
64K or 56Kbps line speeds. Two separate data calls will be
established consecutively.
be able to handle data circuit switch connections with unrestricted
64K or 56Kbps line speeds. Two separate data calls will be
established consecutively.
Making a Bundled Call with V.120
A bundled V.120 connection is initiated at the calling site when
ATB20 (B channel protocol V.120) has been selected and the
channel bundling mode has been enabled by an AT&J3 command.
The channel bundling command (AT&J3) must be set on both the
calling and receiving sides, otherwise a single channel connection will
be made.
ATB20 (B channel protocol V.120) has been selected and the
channel bundling mode has been enabled by an AT&J3 command.
The channel bundling command (AT&J3) must be set on both the
calling and receiving sides, otherwise a single channel connection will
be made.
Type:
ATB20<Enter>
(Set B channel protocol to V.120)
AT&J3<Enter> (Set the TA to make a bundled call)
Type:
AT&WZ<Enter> (If you want to save the setting)