Zhone 7995 Guida Utente
4. Configuring the Unit Using the Internal Switches
7990-A2-GB20-00
May 2002
4-5
NOTE:
Sync Port and DSL Line Rates can only be selected from a unit configured as
the STU-C (Switchpack S3 #1) with Auto Rate disabled (Switchpack S3 #2)
(see
the STU-C (Switchpack S3 #1) with Auto Rate disabled (Switchpack S3 #2)
(see
Table 4-2.
Switchpack S4 Definitions
−
Model 7995
Switch # . . .
Allows you to . . .
Default in Bold
1
Enable or disable Switchpacks S3 and S4.
OFF = Switchpacks Disabled
ON = Switchpacks Enabled
ON = Switchpacks Enabled
2
Control Sync Port Type.
OFF = EIA-530, RS-449, or X.21
ON = V.35
ON = V.35
3
Select the unit’s timing source. Valid only for a unit configured as the
STU-C.
STU-C.
OFF = Internal clock
ON = External Clock
ON = External Clock
4, 5, 6, 7, 8
Control Sync Port Data Rate. Sync Port rates are fixed except when DSL
Line rate is 200 Kbps. When the DSL Line Rate is 200 Kbps, Sync Port
Rates are 64, 128, 192 Kbps.
Line rate is 200 Kbps. When the DSL Line Rate is 200 Kbps, Sync Port
Rates are 64, 128, 192 Kbps.
NOTE: Switches 4 through 8 are only used when the unit is configured
as an STU-C and Auto Rate is disabled (set to Fixed).
as an STU-C and Auto Rate is disabled (set to Fixed).
Switch Position
Sync Port Rate
Default in Bold
8
7
6
5
4
OFF
OFF
OFF OFF
OFF
2048
Kbps
ON
ON
OFF
OFF
OFF
1536 Kbps
ON
OFF
OFF
OFF
OFF
1024 Kbps
OFF
ON
ON
OFF
OFF
768 Kbps
OFF
ON
OFF
OFF
OFF
512 Kbps
OFF
OFF
ON
ON
OFF
348 Kbps
OFF
OFF
ON
OFF
OFF
256 Kbps
OFF
OFF
OFF
ON
ON
192 Kbps
OFF
OFF
OFF
ON
OFF
128 Kbps
OFF
OFF
OFF
OFF
ON
64 Kbps