5-22
MAX Administration Guide
Administering E1 and T1 Services
Troubleshooting channels
Troubleshooting channels
You might encounter a problem in which the Line Status menu shows that the MAX unit is
calling multiple channels simultaneously, but only some of the channels connect. In this case,
an international MAX unit placed the call, or the call was from the U.S. to another country. In
some countries, setting the Parallel Dial parameter in the Sys Config profile to a value higher
than 1 or 2 violates certain dialing rules, and only some of the channels can connect during call
setup. Try reducing the Parallel Dial parameter value to 2. If the problem persists, try reducing
it to 1.
Ans #
Specifies a telephone number to be used for routing calls received on
the first T1 line to the second line. This may be an add-on number. This
parameter applies only to T1 lines using PBX-T1 conversion.
Ans Service
Specifies that the MAX unit routes an incoming call from Line 1 to
Line 2 (the PBX) if the data service of the call matches the data service
specified by Ans Service. It provides an alternative way to indicate
which calls received on Line 1 should be forwarded to Line 2. If you
set both Ans # and Ans Service to
null
, the MAX unit does not route
incoming calls to Line 2.
If you set
PBX Type=Data
, the MAX unit switches an incoming call
on Line 1 to Line 2 only if its data service type matches the data ser-
vice specified by the Ans Service parameter, and only if its telephone
number matches the telephone number specified by the Ans # parame-
ter.
Delete Digits
Specifies the number of digits deleted from the beginning of the tele-
phone number dialed by the device connected to Line 2. Typically, a
PBX (Private Branch Exchange) is connected to Line 2. A PBX is an
internal telephone network in which one incoming number directs calls
to various extensions and from one office to another.
Use this parameter when the PBX used to be connected to a switch that
supplied a T1 line, is now connected to the MAX unit. The PBX has to
change the numbers it dials. The Delete Digits parameter converts the
number the PBX dials to the number presented to the WAN switch.
This parameter applies only to T1 lines using PBX-T1 conversion.
Input Sample
Count
Allows the PRI-T1 conversion process to use one or two sets of
Goertzel samples to do the DTMF tone detection. By default, the MAX
unit uses only one sample to decode signals from robbed-bit PBXs,
because come PBX devices have a tone duration less than 50ms, which
does not provide enough time to compute two sets of Goertzel samples.
The PRI- T1 conversion process is more accurate when the unit can
use two samples. Using two samples is recommended when the tone
duration is longer than 70ms. This parameter applies only to T1 lines
using PBX-T1 conversion.
Table 5-11. PBX-T1 parameters and settings (continued)
Parameter
Specifies
