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BOCA PRO16 Reference Guide
The < dial modifier causes the modem to pause for a short time after
dialing 0. This allows most PBXs sufficient time to obtain a line before
dialing.
The factory default delay for the < modifier is two seconds. You may
change the length of this delay if necessary. Its length is determined by
the value in S Register 8.
Another method of making the modem wait for a dial tone is to include
the : (colon) dial modifier. The : modifier causes the modem to examine
the phone line to ensure a dial tone has been applied before dialing starts.
For example:
• Type: CRN 0:12345
If the modem cannot detect a dial tone within the time specified by S
Register 7, the modem will return to local command state and send a CFI
AB indicator to the computer.
FDue to differences with some older telephone exchanges, dial tone
detection may not be possible with your modem. Your modem will
only recognize dial tones between 200 Hz and 600 Hz.
If your telephone supports tone dialing then a useful dial modifier is the
T modifier. Inserting a T modifier before the number you are dialing
causes the modem to tone dial that number. For example:
• Type: CRN T12345 <E>
This will cause the modem to dial the phone number 12345.
The modem also supports a P dial modifier which allows it to pulse dial.
These modifiers may be placed at any point in the number you are
dialing and they may be intermingled in the same number. For example,
your telephone line may be connected to a PBX that supports tone dialing
internally, but only pulse dialing externally. You could overcome this
problem by using the T and P dial modifiers in the following way:
•
Type: CRN T0<P12345
<E>The modem tone dials 0 to request an external line, waits for the PBX to
obtain the line and then pulse dials 12345.
V.25bis Operations
V.25bis
Operations
pro16ref.pm6 6/14/96, 2:37 PM73
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