The predecessor of Keshengxun is Rockwell, which is the largest modem chip manufacturer in the world. Conexant chip has stronger anti-interference ability than other chips, and the modem connection speed using Conexant chip is relatively stable, which is suitable for noisy telephone lines. The company's main products are as follows:
1. keshengxun ACF56K: it is an all-hard chip that supports V.90 and K56 Flex protocols. it has two versions, 1Mbit ROM and 2Mbit ROM, and is suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
2. Keshengxun HCF56K: It is a semi-soft chip that supports V.90 and K56 Flex protocols, and is suitable for MODEM with PCI or USB interfaces.
3. Keshengxun HSF56K: It belongs to all-soft chip, supports V.90 and K56 Flex protocols, and is suitable for the built-in modem of PCI interface.
4.Rockwell 56ACF: It is an all-hard chip that supports K56 Flex and V.90 It is suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
5. Rockwell 56PDF: It belongs to semi-soft chip, supports K56 Flex and V.90 automatic dual-frequency switching, and is suitable for MODEM with PCI or USB interfaces.
6. Conesente? Rockwell RH56/SP-PCI R6795: It belongs to semi-soft chip, supports V.90 and K56 Flex protocols, and is suitable for the built-in modem of PCI interface.
7. Conesente? Rockwell RH56/SP-PCI R6793: It belongs to all-soft chip, supports V.90 and K56 Flex protocols, and is suitable for the built-in modem of PCI interface.
8.Conexant AC-link: It belongs to all-soft chip, conforms to AC'97 standard, supports V.90 and K56 Flex protocols, and is suitable for built-in modems with AMR interface.
9. Keshengxun SC56D: This chip supports the V.92 protocol.
Second, TI (Texas Instruments) Company
TI？ Texas Instruments, Texas Instruments is also a famous modem chip manufacturer. In the case of low telephone line noise, the network connection speed of MODEM using TI chip is generally faster than that using Rockwell chip. That is to say, on the line with good quality, TI's MODEM chip can better reflect the speed advantage. TI chip is mainly used in high-end modem products. The main product is TMS320 chip, which supports V.90 and X2 protocols and is suitable for external or internal modems with ISA interface.
Third, lucent company.
Lucent is a world-renowned manufacturer of communication products, and its modem chip product line is also relatively rich. The main products are as follows:
1. lucent 1646: All-hard chip, supporting V.90 and K56 Flex protocols, suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
2. Lucent M- 1673: All-hard chip, supporting V.90 and K56 Flex protocols, suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
3. Lucent Venus(M- 1675): It is an all-hard chip with two versions of 1Mbit ROM and 2Mbit ROM, which supports V.90 and K56 Flex protocols and is suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
4. Lucent L56DV, L56DV, L56DV+P: These chips are hard chips, support the V.90 protocol, and are suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
5. Lucent Apollo and luna: They are semi-soft chips and are suitable for the built-in modems of ISA interface.
6. Lucent Mars: It belongs to a semi-soft chip and is suitable for the built-in modem of ISA or PCI interface.
7. Lucent L56DL, L56DLI, L56DAS, L56DASI, L56DM+S: semi-soft chips, supporting V.90 and K56Flex protocols, suitable for built-in modems with ISA or PCI interfaces.
8. Lucent L56DT: It belongs to all-soft chip, supports V.90 and K56Flex protocols, and is suitable for the built-in modem of PCI interface.
Fourth, Intel Corporation.
Ambient Technologies, a subsidiary of Intel, is a professional modem chip manufacturer. That is, the earliest Cirrus Logic, later renamed Ambient Technologies, until it was changed to Intel. So its modem chip has three different vendor names. If the chip models are the same, their technical parameters are also the same. The main products are as follows:
1.CirrusLogic MD562X: It is a semi-soft chip that supports V.90 and x2 protocols and is suitable for the built-in modem of PCI interface.
2. Environment MD563X-HaM and Intel MD563X-HaM: They are semi-soft chips, support V.90 protocol, and are suitable for built-in modems with PCI interface.
3.CirrusLogic MD565X and Ambient MD565X: All-hard chips support V.90 and x2 protocols, and are suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
4.CirrusLogic MD566X, Ambient MD566X and Intel MD566X: all are hard chips, support V.90 and x2 protocols, and are suitable for external modems or built-in modems with ISA and PCMCIA interfaces.
5. Environment MD567X and Intel MD567X: All-hard chips support V.90 protocol and are suitable for modems with USB interface.
5.ESS company
As we all know, in 1950s, the sound cards such as ESS 1688 produced by ESS Company were quite famous. In fact, ESS chips can be seen everywhere in low-end MODEM products. Its main products are chips such as ES56CV-P, ES56PI and ES56X, all of which are soft modem chips and are suitable for built-in modems with PCI interface.
6. Motorola (Motorola) Company
There are two main types of modem chips produced by Motorola:
1 .motorola SM56 AC-link: It is an all-soft chip, conforms to the AC'97 standard, and is suitable for the built-in modem of AMR, CNR and MDC interfaces.
2. Motorola SM56: It belongs to all-soft chip and is suitable for the built-in modem of ISA or PCI interface.