User guide

Hardware Provisioning POTS Only with Call Agent (POTS24 Card)
4-5
Telesyn Service Guide (Optimizing Voice Services)
4.2.4.1 Line Supervision Mode
Only loop start is supported; ground start is not supported.Card Attributes
4.2.4.2 Ring Generator
The ring generator on the POTS24 card has limited output, depending on line loads, as follows:
The ring generator will gradually reduce output voltage until the load reaches 40 Ringer Equivalency Number
(REN). This helps to prevent distortion. If the load goes over 40 REN for more than 600 msec, the generator will
shut down for 5 seconds. It will then try to recover and manage the perceived load normally. After the recovery,
if more than 40 REN still exists, another shutdown will occur.
4.2.5 Hardware Provisioning
4.2.5.1 POTS24 Card
The POTS24 supports all SM card attributes. However, the POTS24 must have IP, MGCP, and RTP protocol
attributes provisioned in association with the card in order to provide service. Therefore, the POTS24 card
cannot be completely auto-provisioned to an in-service state; some manual configuration is required for each
card that cannot be specified in the auto-provisioning profiles.
4.2.5.2 Configuring POTS24 Card Protocol Attributes
A virtual Ethernet interface is created using the ADD IP INTERFACE command.
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TABLE 4-2
Ringer Output Voltage Line Load (in REN)
100Vrms 10REN
90Vrms 13REN
86Vrms 15REN
75Vrms 20REN
65Vrms 25REN
55Vrms 35REN
45Vrms 40REN
shutdown 40REN