Huawei B311-221 Product Description page 16

HUAWEI B311-221 LTE CPE
Product Description
Item
Voice
Issue02 (2019-08-15)
Description
VoIP Supports G.711a/G.711u/G.726 (-24/-32)/G.722/G.729
(Optional) codec.
Supports SIP (RFC3261).
Supports SDP (RFC2327).
Supports RTP/RTCP (RFC1889/RFC1890/RFC3550).
Supports in-band/SIP info/RFC2833 DTMF.
Supports the following phone features:
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Supports CS voice communication over UMTS and
CS
GSM networks.
Supports circuit switched fallback (CSFB).
Supports the following phone features:
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VoLTE
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(Optional)
Supports SRVCC to UMTS
Supports SRVCC to GSM
Supports in-band/out-band (RFC2833) DTMF
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Caller ID generation
Call waiting
Call forwarding (unconditional, busy, and no answer
forwarding)
Call hold
Three-way conference
Caller ID generation
Call waiting
Call forwarding (unconditional, busy, and no answer
forwarding)
Call hold
Three-way conference
Originating Identification Presentation/Restriction
Outgoing Communication Barring
Supports AMR-NB codec
Supports AMR-WB codec
2 Technical Specifications
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