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| AMIS Voice Port Needs
To determine if additional voice ports are needed on your system to support the AMIS Analog Networking and/or Message Delivery features, first consider the amount of traffic (number and length of messages) you expect to occur during the busiest time of the day. Consider the following to help you determine whether there are sufficient voice ports on the system: If you do not plan to use the AMIS Analog Networking and/or Message Delivery features during the busy hour (for example, if you plan to allow messages to be transmitted only at night), you probably have enough voice ports to support this feature. However, after the feature is activated, you might want to verify that system performance is not affected by following the steps in Monitor Voice Port Use. If you plan to use the AMIS Analog Networking and/or Message Delivery features during the busiest time of the day, consider the impact of these features on voice-port use as follows: If the expected AMIS analog networking and/or message delivery traffic is light, you probably do not need to add any voice ports to support this feature. However, after the feature is activated, you might want to verify that system performance is not affected by following the steps in the Monitor Voice Port Use. If the expected AMIS analog networking and/or message delivery traffic is heavy, perform the following calculations to determine the effect these features could have on system performance. ### Calculate Expected Voice Port Use If you plan to use the AMIS Analog Networking and/or Message Delivery features during the busiest time of the day and you want to estimate the impact these features might have on your system performance, perform the following calculations: Estimate the number of AMIS analog networking and/or message delivery messages that you expect to occur during the busiest hour of the day. Estimate the anticipated length of each message. Each AMIS and/or message delivery message requires an additional 45 seconds of overhead to transmit. Multiply the values from Steps 1 and 2 as follows: (# messages) (average message length + 45 seconds) = number of seconds of port use Divide the total seconds of projected port usage by 3600. This number represents the additional port usage required to support this feature during the busy hour. X seconds of port use / 3600 = # additional port usage Add this number to the maximum average number of ports in use. See Monitor Voice Port Use section for the form and field needed on your system to get these values. Determine if the resulting Grade of Service (GOS) is acceptable. If not, plan to install the recommended number of additional voice ports before implementing the AMIS Analog Networking or Message Delivery features. For information on calculating the GOS, see Feature Reports and Grade of Service. A GOS of .05 is recommended (a lower GOS is desirable). If the GOS is greater than .05, additional voice ports are recommended. Contact your sales representative. ### Monitor Voice Port Use Use the following procedure to determine if additional voice ports are needed on your system. You can use this procedure after activating the AMIS Analog Networking and/or Message Delivery features to determine their impact (if any) on system performance: Display the Feature Daily Traffic form by using the list measurements feature day command and record the number you see in the `Maximum Average Ports in Use` field. Calculate the Grade of Service (GOS). For information on calculating the GOS, see Feature Reports and Grade of Service. A GOS of .05 is recommended (a lower GOS is desirable). If the GOS is greater than .05, additional voice ports are recommended. Contact your sales representative. ### Top of page

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