SRST MMOH Rules

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SRST (Survivable Remote Site Telephony) is a Cisco feature that allows a Cisco IP phone to register with a Cisco router during a WAN outage, thus enabling IP telephony services to continue during the outage.

MMOH (Multiple MOH) is a feature in SRST that allows multiple music on hold (MOH) sources to be played to different groups of phones during an outage. This provides a way for an organization to provide different types of MOH audio to different groups of users, such as different languages or music types.

The two rules that apply to MMOH in SRST are:

B. Cisco Unified SRST voice gateway allows you to associate phones with different MOH groups on the basis of their IP address to receive different MOH media streams.

D. Cisco Unified SRST voice gateway allows you to associate phones with different MOH groups on the basis of their MAC address to receive different MOH media streams.

Explanation:

Option B is correct because it states that Cisco Unified SRST voice gateway allows you to associate phones with different MOH groups on the basis of their IP address to receive different MOH media streams. This means that different groups of phones can be configured to receive different MOH audio streams based on their IP address.

Option D is also correct because it states that Cisco Unified SRST voice gateway allows you to associate phones with different MOH groups on the basis of their MAC address to receive different MOH media streams. This means that different groups of phones can be configured to receive different MOH audio streams based on their MAC address.

Option A is incorrect because there is no maximum limit on the number of MOH groups that can be created.

Option C is incorrect because there is no limit on the number of media streams that can be configured.

Option E is incorrect because Cisco Unified SRST does not support associating phones with different MOH groups on the basis of their extension numbers.