Demand test descriptions and error codes - Avaya Support

Since the TN2182 also provides Tone-Clock function for non IPSI port networks, only one (or
two if your system is duplicated) TN2182 circuit packs may reside in a PN. If more
tone-detection resources are needed, the additional resources must be provided by TN748,
TN420, or TN744 circuit packs.
Tone-Clock and the Reliability Configuration
S8700-series IP-PNC
A Tone Clock circuit resides on each IPSI board. For increased reliability, there is a duplicated
server, one in active mode and one on standby. However, there is only one control network and
one IPSI per port network as shown in Figure 88: S8700 IP-PNC Duplex Reliability
Configuration. Therefore there is only one Tone Clock circuit per port network.
988 Maintenance Alarms for Communication Manager, Media Gateways and Servers