3.2.1 Setting the Electrical Interface (Switches S1 & S2)
In order to make the VDQM work in your application, you must set
the electrical interface of the synchronous data port. Applicable
electrical interfaces are:
a) V.35
(default setting)
b) EIA-232
c) EIA-422
To set the electrical interface, set Switches S1-1 through S1-8 and
Switches S2-1 through S2-6.
Switches S2-7 and S2-8 are reserved for
future usage and must remain in the OFF position. The following table
summarizes the VDQM switch settings for each of these interfaces:
NOTE: All of the above electrical interfaces are implemented on a
HD-26 connector). Please refer to Appendix C for the applicable
pin assignments.
5
Electrical
S1-1 S1-2 S1-3 S1-4 S1-5 S1-6 S1-7 S1-8 S2-1 S2-2 S2-3 S2-4 S2-5 S2-6
V.35*
On
On
On
On
Off
On
On
Off
On
Off
Off
Off
On
On
EIA-232
Off
Off
Off
Off
On
Off
Off
On
Off
On
On
On
On
Off
EIA-422
On
On
On
On
Off
Off
On
Off
Off
Off
Off
Off
Off
Off
Data Port Electrical Interface Summary Table
* Default Setting
Switch Settings
NOTE: Both voice ports must meet the country of
installation's requirements for a PSTN interface device,
which is typically defined in NET-4. If a country
requirement is not defined in NET-4, it is possible to
configure the phone interface to meet those country
requirements within a month of receiving the specifications
and test criteria from that country.
3.2.2 Setting the DTE Rate (Switches S3-1 through S3-4)
You must also set the bit rate of the VDQM to match the bit rate of
the equipment connected to the DTE port. The following table
summarizes the DTE rate settings of the VDQM.
To set the DTE rate, set Switches S3-1 through S3-4 (
Switches
S3-5 through S3-8 are reserved for future use and must remain in the
OFF position).
NOTE: You must also set the applicable DTE rate on the
baseband modem (ie. Model 1092, 1093, etc). Please see the
baseband modem user manual for details. The baseband modem
and the VDQM must be set for the same DTE rate.
6
DTE Rate
(kbps)
S3-1
S3-2
S3-3
S3-4
128*
Off
Off
Off
Off
256
On
Off
Off
Off
384
Off
On
Off
Off
512
On
On
Off
Off
640
Off
Off
On
Off
768
On
Off
On
Off
896
Off
On
On
Off
1024
On
On
On
Off
1152
Off
Off
Off
On
1280
On
Off
Off
On
1408
Off
On
Off
On
1536
On
On
Off
On
1664
Off
Off
On
On
1792
On
Off
On
On
1920
Off
On
On
On
2048
On
On
On
On
Data Rate Summary Table
Switch Settings
* Default Setting
