Telos Zephyr Xstream - Manual (Page 252)

USER’S MANUAL
Section 11: THE WORKS – Detailed Menu Reference 240
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IMPORTANT TIP!
The Number field in the DIAL menu is different from other entry fields in the Zephyr
Xstream. It is NOT necessary to press <SEL> before entering the number to be dialed.
While we like consistency, this field is used so often, it made sense to make it easier by doing
this. It also makes operation more similar to the Zephyr classic.
If you wish to specify the Line to be used, or use a Mode other than the default (i.e. other than
Zephyr) you can do so. After entering the number, press <SEL>, then use the <
5> or <6> keys
to move to the desired menu selection, and press <SEL> again to change the item. Repeat this
process till all items are set as desired.
Once you have set the Line and Mode press <DIAL> to make the connection.
The available modes are:
• Zephyr ‐ Places a "data" mode call at the rate indicated in the CODEC menu.
• Phone ‐ Places a "voice" mode call according to the G.711 standard. This
allows placing a call to any standard telephone line. In effect, this makes
your Xstream into a telephone coupler.
• Xport ‐ Places a "voice" mode call according to the G.711 standard and loads
Xstream's modem code into DSP to allow communication with a Zephyr
Xport connected to a POTS (analog) line. When call is made in this mode,
the Interface setting, in the TEL menu, will change from ISDN to ISDN
Modem automatically. This will also occur when an incoming "voice" mode
call is answered and can be ignored by the user (if an ISDN mode call is
subsequently made, or received, the unit will switch back to ISDN interface
automatically.
A note regarding Mode detection of incoming calls:
The ISDN network will signal if a call is a "voice" or "data" call. Since modems use POTS
technology, calls from an Xport on an analog line are considered "voice" calls. In the case of a
"data" call no other information is needed; the Xstream will switch from the ISDN Modem
Interface to ISDN, if necessary, and answer the call.
If the network indicates an incoming call is a "voice" call, the Xstream must determine if this is a
call from a telephone, or from the modem of an Xport. Therefore, the Xstream will switch from
the ISDN Interface to ISDN MODEM, if necessary, answer the call, and then listen for a modem
tone. If no modem tone is detected, the unit un‐mutes the audio and the call is considered an
"Phone" Mode call. If a modem tone is detected the Xstream's modem will begin negotiating
with the Xport.
Therefore, all incoming "voice" calls have a short delay before audio is heard.