Ricoh A250 Service Manual page 541

688B9C to 68981B(H) - Dedicated tx parameters for Speed Dial #00 - #99.
There are 32 bytes for each Speed Dial. Only the 23rd to 32nd bytes are used.
688BB2 to 688BBB(H) - Dedicated tx parameters for Speed #00
688BD2 to 688BDB(H) - Dedicated tx parameters for Speed #01
688BF2 to 688BFB(H) - Dedicated tx parameters for Speed #02
689812 to 68981B(H) - Dedicated tx parameters for Speed #99
68E8E4 to 68E8E5(H) - Line type change (refer to section 2 for more details)
68E8E4(H) - Current line type setting
68E8E5(H) - Line type to be used after the procedure
69CA00 to 69CBFF(H) - Latest 64 error codes (Read only)
One error record consists of 8 bytes of data.
First error record start address – 69CA00(H)
Second error record start address – 69CA08(H)
Third error record start address – 69CA10(H)
:
64th error record start address – 69CBF8(H)
The format is as follows:
1st byte - Minute (BCD)
2nd byte - Hour (BCD)
3rd byte - Day (BCD)
4th byte - Month (BCD)
5th byte - Error code – low (BCD) [If the error code is 1-23, 23 is stored here.]
6th byte - Error code – high (BCD) [If the error code is 1-23, 01 is stored here.]
7th byte - Communication line (Hex)
PSTN: 00(H), PABX: 02(H), ISDN G3: 0C(H), ISDN G4: 0D(H)
8th byte - Not used
SM
SERVICE RAM ADDRESSES
4-79 A250