
APPENDIX A: SPECIFICATIONS AND SERVICE
The 
AT commands supported
A, D, E, F, H, I, M, O, Q, V, X, Z
S registers: 
Additional commands to support TTY modes
| B0 | Automatic ASCII/Baudot detection | 
| 
 | (default) | 
| B1 | Baudot 45.5 baud | 
| B2 | Baudot 50 baud | 
| B3 | ASCII 300 baud | 
| B4 | ASCII 110 | 
| N0 | High sensitivity in Baudot | 
| N1 | Normal sensitivity in Baudot | 
| 
 | (default) | 
| S13 | |
| Result Codes | |
| Numeric | Verbal | 
| 0 | OK | 
| 1 | Connect | 
| 2 | Ring | 
| 3 | No Carrier | 
| 4 | Error | 
| 5 | Connect TTY | 
| 6 | No dial tone | 
| 7 | Busy | 
| 8 | Ringing | 
| 9 | TTY  | 
| Front panel lights | |
| Power | Power on | 
| BDT | Baudot code | 
| ASC | ASCII | 
| HI | 300 baud for ASCII; 50 baud for | 
| 
 | Baudot | 
| LO | 110 baud for ASCII; 45 baud for | 
| 
 | Baudot | 
| CD | Carrier detect in ASCII | 
| RXD | Receive data | 
| TXD | Transmit data | 
OH 
| SIG | Telephone line signal | 
Back panel connections
RJ11 Telephone line
RJ11 Telephone
DB9S RS232C
DIN 5 Accessory
Speaker volume
Power jack
On/Off switch
RS232C connection: DB9S
| Pin | Signal | 
| 2 | TXD | 
| 3 | RXD | 
| 4 | DTR | 
| 5 | GND | 
| 8 | CTS | 
Audio Monitor: Internal speaker with volume control
Compatibility: ASCII Bell 103 110/300 bps asynchronous; TTY Baudot 45.5 or 50 baud; 1400/1800 Hz.
Dialing: Tone or pulse
Answer: Automatic or manual telephone answering
Call progress: Dial tone, busy, ringing
Receiver sensitivity: Better than 
Transmit level: 
| Power: | 10VAC 15VA  | 
| 
 | adapter included. | 
| Size: | 6.3 in. (16.2 cm) wide; 1.5 in. (3.7 | 
| 
 | cm) high; 9.5 in. (24.1 cm) deep | 
| Weight: | 24 oz (0.68 kg) | 
22 • APPENDICES
