After upgrading some DSP's to 2.1.9 I noticed, I was getting a fast busy signal out of a sudden on some PRI spans (it happens once every 2 days). Although all PRI channels show InService, I can fix the problem by sending a busy out on the PRI channels and restore them back. This is new and I did not have this problem with DSP codes 2.0.xx I have reviewed the release notes and noticed a new behavior introduced with the 2.1.9 code: ======= From the DSP 2.1.9 release notes ================== PRI Service Messaging The behavior of PRI Service Messaging has changed in the 2.1.9 version of code. The 2.1.9 version of HiPer DSP code will not change the B-channel service state from Out of Service (OOS) to In Service (IS) if a Service ACK is not received from the switch. For this reason, if your span does not support Service Messaging, such as NI-2, you must disable service message support on the HiPer DSP since it is enabled by default. To disable support, issue the set servicemsg disable span level command from the console. ================================================= My questions are: - How can I find out if the telco switch (DMS100) sends a Service ACK or not ? - What kind of problem will I get if I disable the PRI messaging support (as stated in the release notes) - How can I disable the PRI messaging support remotely through a HARC telnet connection - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.