Huawei MU509 At Command Interface Specification page 191

HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification
71: 9600 bps (V.110 or X.31 flag stuffing)
75: 14400 bps (V.110 or X.31 flag stuffing)
79: 19200 bps (V.110 or X.31 flag stuffing)
80: 28800 bps (V.110 or X.31 flag stuffing)
81: 38400 bps (V.110 or X.31 flag stuffing)
82: 48000 bps (V.110 or X.31 flag stuffing)
83: 56000 bps (V.110 or X.31 flag stuffing; this setting can be used in conjunction with
asynchronous non-transparent UDI or RDI service in order to get FTM)
84: 64000 bps (X.31 flag stuffing; this setting can be used in conjunction with
asynchronous non-transparent UDI service in order to get FTM)
115: 56000 bps (bit transparent)
116: 64000 bps (bit transparent)
120: 32000 bps (PIAFS32k)
121: 64000 bps (PIAFS64k)
130: 28800 bps (multimedia)
131: 32000 bps (multimedia)
132: 33600 bps (multimedia)
133: 56000 bps (multimedia)
134: 64000 bps (multimedia)
<service>: (service related to the phone number):
0: Asynchronous modem
1: Synchronous modem
2: PAD Access (asynchronous)
3: Packet Access (synchronous)
4: Voice (reserved, not supported currently)
5: Fax (reserved, not supported currently)
Also all other values below 128 are reserved by the present document.
<itc> (information transfer capability):
0: 3.1 kHz
1: UDI
Issue 04 (2013-01-28)
Huawei Proprietary and Confidential
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Network Service Commands
191