Ricoh D131 Service Manual page 1100

6B9000 to 6B91FF(H) - Error code (Max. 512 byte)
6B9200 to 6BD61F - Reception results (Max. 17440 byte)
6BD620 to 6BDFA7 - Transmission error (Max. 2440 byte)
6BEBFE(H) - 6BEC1E (H) - Dial tone detection parameter (Max. 11 x 3 lines)
This initializes following order. [0x04, 0x40, 0x03, 0x60, 0x64, 0xf4, 0x01,0x64, 0x04, 0xc8, 0x00]
6BEBFE(H) – Dial tone detection frequency – Upper limit (High)
Defaults: NA: 06, EU: 06, ASIA: 06
6BEBFF(H) – Dial tone detection frequency – Upper Limit (Low)
Defaults: NA: 50, EU: 50, ASIA: 50
6BEC00(H) – Dial tone detection frequency – Lower Limit (High)
Defaults: NA: 03, EU: 02, ASIA: 02
6BEC01(H) – Dial tone detection frequency – Lower Limit (Low)
Defaults: NA: 60, EU: 90, ASIA: 90
6BEC02(H) –Dial tone detection waiting time (20 ms)
Defaults: NA: 64, EU 64, ASIA: 64
6BEC03 to 6BEC04 – Dial tone detection monitoring time (20 ms)
Defaults
Area 6BEC03
NA F4
EU F4
ASIA F4
6BEC05(H) – Dial tone detect judge time (20 ms)
Defaults: NA: 64, EU: 1B, ASIA: 32
6BEC06(H) – Dial tone disconnect permission time (20 ms)
Defaults: NA: 11, EU: 0F, ASIA: 11
D619
6BEC04
01
01
01
208 SM