Telos Zephyr Xstream User Manual page 239

TEL – Screen 5:
DTMF: (On; Off)
This enables/disables DTMF "Touch Tones" when connected on a voice call (i.e. call type
= "phone"). These are useful for navigating through voice menu systems.
We offer the option of turning this off in the case that you may be entering information
with the keyboard while dialed up on a voice call.
Redial
Sets the delay between automatic ISDN redials, or disables the feature. If an outgoing
call is active when the Xstream loses ISDN connectivity or power, it will attempt to re‐
establish the call as soon as the error state is cleared (that is, when the ISDN comes back
to life, or power is restored to the Xstream). You can adjust the time between these
attempts, or disable them entirely. The redialing feature is also used when attempting
to dial via contact closures and v.35 roll‐over (see next item).
ISDN Backup
On an Xstream with both a v.35/x.21 card and an ISDN card, you can enable a rollover in
case of v.35/x.21 failure. If you choose to enable this feature, this menu item will allow
you to select an dial setup (any of your first ten) to be used. Note that by enabling this
feature, you also allow ISDN calls to switch the Xstream from v.35/x.21 mode to ISDN
mode (This is necessary because while one side of the high speed serial connection may
see a failure, the other side could be operating as usual. In this case, when the side seeing
the failure condition switches to ISDN mode and redials, the other side must respond to
the ISDN request).
USER'S MANUAL
Section 11: THE WORKS – Detailed Menu Reference 227