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| 型號： | SI2457-D-GT |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 28/60頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ISOMODEM GLOBAL DAA 24TSSOP |
| 標(biāo)準(zhǔn)包裝： | 62 |
| 系列： | * |
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Si2457/34/15/04
34
Rev. 1.3
%V2
Automatic Line Status Detection—Adaptive Method.
Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 com-
pares the line voltage (via LVCS) to the NLIU (U85) register:
Loop Voltage
Action
0
LVCS (0.0625 x NLIU)
Report “NO LINE” and remain on-hook.
(0.0625 x NLIU) < LVCS
(0.85 x NLIU) Report “LINE IN USE” and remain on-hook.
(0.85 x NLIU) < LCVS
Go off-hook and establish a modem connection.
The NLIU register is updated every 1 ms with the minimum non-zero value of LVCS in the last
30 ms. This allows the Si2457/34/15/04 to eliminate errors due to 50/60 Hz interference and also
adapt to relatively slow change in the on-hook dc reference value on the telephone line. This algo-
rithm does not allow any non-zero values for NLIU below 0x0007. The host may also initialize NLIU
prior to issuing the %V2 command. Once the call has begun, the off-hook intrusion algorithm
(described in "4.12.2. Off-Hook Intrusion Detection" on page 19) operates normally. In addition, the
Si2457/34/15/04 will report “NO LINE” if the telephone line is completely disconnected. If the HOI
(U77, bit 11) bit is set, “LINE IN USE” is reported upon intrusion.
Table 10. Extended AT% Command Set (Command Defaults in Bold) (Continued)
Command
Action
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| SI2457-D-GTR | 制造商:Silicon Laboratories Inc 功能描述:56 KBPS, V.90 ISOMODEM SYSTEM- 制造商:Silicon Laboratories Inc 功能描述:56 KBPS, V.90 ISOMODEM SYSTEM-SIDE - LEAD-FREE - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOMODEM GLOBAL DAA 24TSSOP 制造商:Silicon Laboratories Inc 功能描述:56 kbps V90 ISOmodem System-Side PBF |
| Si2457FS08-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 16-pin Si2457+Si3008 ISOmodem Eval Board RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| Si2457FS18-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 16-pin Si2457+Si3018 ISOmodem Eval Board RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| SI2457-FT | 功能描述:電信線路管理 IC CONTACT SILICON LABS FOR AVAILABILITY RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| Si2457FT08-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 24-pin Si2457+Si3008 ISOmodem Eval Board RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
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