DCP Configuration
Table
(7 of 8)
DTE Interface Configuration Options Ð Singleport Mode A
Bakup_TXClk_Src: Internal
Nxt Internal External RXC_Loop
This configuration option only appears in customized installations in which the Dual_Leased_Ln is configured for Enable and Async/Sync Mode is Sync.
Backup Transmit Clock Source. Selects the clock reference source when operating in the Dual Leased Line Mode. This is a special mode in which one leased line is used to back up another.
Internal ± The transmit data's clock source is derived from the modem's internal clock. This clock is available as an output on Pin 15 (TXC) of the
External ± The transmit data's clock source is provided by the DTE on Pin 24 (XTXC) on the
Receive Clock Loop ± The modem's transmit clock is derived from its received analog signal. The derived clock is available as an output on Pin 15 (TXC) of the
XTXC Clamps TXC: Enable
Nxt Enable Disable
This configuration option only appears when TX Clock Source is configured for External.
External Transmit Clock Clamps Transmit Clock. Allows the modem's TXC output (Pin 15 on the
Enable ± TXC is clamped off when TX Clock Source is configured for External.
Disable ± TXC continues to be provided when TX Clock Source is configured for External.
The AT command is
CT111_Rate Cntl: Disable
Nxt Disable Fallback1 Fallback2
This configuration option does not appear when V.34 is enabled for a leased or dial line.
CT111 Rate Control. Allows the DTE to control modem rate via Pin 23 of the
Disable ± Disregards CT111 Rate Control.
Fallback1 ± Forces the modem to decrease its configured data rate to the next lower data rate when CT111 is OFF. Valid only for V.32bis, V.33, V.29 modulation. Modem will only fall back within the same modulation scheme. When CT111 turns ON, the modem returns to its previous data rate.
Fallback2 (Not available for TMp tributaries) ± Forces the modem to decrease two data rates while remaining in the same modulation scheme. When CT111 turns ON, the modem returns to its previous data rate.
NOTE: This configuration option is only valid in Async Direct mode and Synchronous mode. For proper operation, disable the V.32bis Autorate and V.32bis Automode configuration options.
The AT command is
DTE_Rate=VF: Disable
End Disable Enable
This configuration option does not appear when Async/Sync is configured for Sync.
DTE Rate = VF. Forces the DTE's data rate to be equal to the VF (telephone line) data rate.
Disable ± The data rate of the connection between the DTE and modem is the value of the Async DTE Rate configuration option.
Enable ± The data rate between the DTE and modem is the same as the modem's VF data rate. As a result, when the modem is in Data mode, the speed of the data passed between the modem and DTE occurs at the VF data rate.
The AT command is
November 1996 |
