A company has an SRST gateway running an IOS XE image. The company plans to enable the IPv6 addressing companywide. To enable the IPv6 in a unified SRST gateway to support SIP phones, what are two sup

The correct answer is A. three-way conference C. T.38 fax relay. Cisco Unified SRST with IPv6 support for SIP phones has a defined set of supplementary features that function during an IPv6 fallback (survivability) scenario. Three-way conference calling (A) is supported, allowing users to bridge a third party into an active call. T.38 fax rela

CME/SRST Gateway Technologies

Question

A company has an SRST gateway running an IOS XE image. The company plans to enable the IPv6 addressing companywide. To enable the IPv6 in a unified SRST gateway to support SIP phones, what are two supported supplementary features for an IPv6 fallback scenario? (Choose two.)

Options

Athree-way conference
Bsecure SIP lines
CT.38 fax relay
Dtranscoding
ESIP Trunk

How the community answered

(30 responses)

A
73% (22)
B
17% (5)
D
3% (1)
E
7% (2)

Explanation

Cisco Unified SRST with IPv6 support for SIP phones has a defined set of supplementary features that function during an IPv6 fallback (survivability) scenario. Three-way conference calling (A) is supported, allowing users to bridge a third party into an active call. T.38 fax relay (C) is also supported, enabling fax transmission over IP networks via the T.38 protocol even in IPv6 mode. Secure SIP lines (B) using TLS/SRTP and transcoding (D) are not supported in the IPv6 SRST context under IOS XE unified SRST. SIP Trunk (E) is a gateway/trunk type, not a supplementary feature in the context of SRST fallback capabilities.

Topics

#SRST#IPv6 support#Supplementary features#SIP telephony

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