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COMSPHERE 3900 Series Modems
Table
(2 of 6)
Leased Line Configuration Options
LeasedLine Rate: 19200(V32t)
Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 19200(TMp) 14400(TMp) 9600(TMp) 7200(TMp) 4800(TMp) 2400(TMp) 2400(V22bis) 14400(V33) 12000(V33) 9600(V29) 7200(V29) 4800(V29) 4800(V27bis) 2400(V27bis)
NOTE: Certain changes to this configuration option will cause the modem to reset.
H19200(V32t), 16800(V32t), 14400(V32b), 12000(V32b), 9600(V32b), 7200(V32b), 4800(V32b) The modem operates using V.32bis or V.32terbo modulation at the data rate selected. These modulation schemes are available on
H19200(TMp), 14400(TMp), 9600(TMp), 7200(TMp), 4800(TMp), 2400(TMp)
The modem operates in Trellis Multipoint mode at the data rate selected. These modulation schemes are available on
NOTE: TMp control modems can accept mixed inbound rates from tributary modems. For example, one inbound link may be configured for 14.4 kbps while another link experiencing line impairments may be configured for 9.6 kbps. The following control/tributary rate combinations are allowed: control at
19.2kbps, tributaries at 14.4 or 9.6 kbps; control at 14.4 kbps, tributaries at 14.4 or 9.6 kbps; control at 9.6 kbps, tributaries at 9.6 or 7.2 kbps; control at 7.2 kbps, tributaries at 7.2 or 4.8 kbps; control at
4.8kbps, tributaries at 4.8 or 2.4 kbps; control at 2.4 kbps, tributaries at 2.4 kbps. Tributary rates will never exceed control rates. If tributary and control rates are equal, reducing the control rate automatically reduces the tributary rate.
H2400(V22bis)
This modulation scheme is available on
H14400(V33), 12000(V33)
These modulation schemes are only available on
H9600(V29), 7200(V29), 4800(V29)
These modulation schemes are only available on
H4800(V27bis), 2400(V27bis)
This modulation scheme is available on
NOTE: It is recommended that both modems use the same fixed data rate.
NOTE: The modem must be in Direct mode before the modulation scheme can be changed from V.32bis to another
The AT command is
1 | = 14,400 | (V.32bis) | 12 | = 12,000 (V.33) | 19 | = 16,800 | (V.32 terbo) | |
2 | = 12,000 | (V.32bis) | 13 | = 9600 (V.29) | 20 | = 19,200 | (TMp) | |
3 | = 9600 (V.32bis) | 14 | = 7200 | (V.29) | 21 | = 14,400 | (TMp) | |
4 | = 7200 (V.32bis) | 15 | = 4800 | (V.29) | 22 | = 9600 (TMp) | ||
5 | = 4800 (V.32bis) | 16 | = 4800 | (V.27bis) | 23 | = 7200 (TMp) | ||
6 | = 2400 (V.22bis) | 17 | = 2400 | (V.27bis) | 24 | = 4800 (TMp) | ||
11 | = 14,400 | (V.33) | 18 | = 19,200 (V.32 terbo) | 25 | = 2400 (TMp) |
September 1998 |