Version 5.2 145 September 2007
SIP User's Manual 5. Web-based Management
Table 5-24: Digital Gateway Parameters
Parameter Description
Enable ISDN Tunneling Tel to IP
[EnableISDNTunnelingTel2IP]
Valid options include:
 [0] Disable = Disable (default).
 [1] Using Header = Enable ISDN Tunneling from ISDN PRI to
SIP using a proprietary SIP header.
 [2] Using Body = Enable ISDN Tunneling from ISDN PRI to SIP
using a dedicated message body.
When ISDN Tunneling is enabled, the gateway sends all ISDN
PRI messages using the correlated SIP messages. Setup is
tunneled using INVITE, all mid-call messages are tunneled using
INFO, and Disconnect/Release is tunneled using BYE. The raw
data from the ISDN is inserted into a proprietary SIP header (X-
ISDNTunnelingInfo) or a dedicated message body
(application/isdn) in the SIP messages.
Note: It is necessary to set the parameter
ISDNDuplicateQ931BuffMode to 128 (duplicate all messages) for
this mechanism to function.
Enable QSIG Tunneling
[EnableQSIGTunneling]
Enables QSIG tunneling over SIP according to <draft-elwell-
sipping-qsig-tunnel-03>.
 [0] Disable = Disable (default).
 [1] Enable = Enable QSIG tunneling from QSIG to SIP and vice
versa.
When QSIG tunneling is enabled, all QSIG messages are sent as
raw data in corresponding SIP messages using a dedicated
message body. Note that QSIG tunneling must be enabled on both
the originating and terminating gateways.
Note: It is necessary to set the parameter
ISDNDuplicateQ931BuffMode to 128 (duplicate all messages) so
that this mechanism can function.
Enable ISDN Tunneling IP to Tel
[EnableISDNTunnelingIP2Tel]
Valid options include:
 [0] Disable = Disable (default).
 [1] Using Header = Enable ISDN Tunneling from SIP to ISDN
PRI using a proprietary SIP header.
 [2] Using Body = Enable ISDN Tunneling from SIP to ISDN PRI
using a dedicated message body.
When ISDN Tunneling is enabled, the gateway extracts raw data
received in a proprietary SIP header (X-ISDNTunnelingInfo) or a
dedicated message body (application/isdn) in the SIP messages
and sends the data as ISDN messages to the PSTN side.
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