Hi,\n\nI'm getting "recovery on timer expiry" errors on outgoing calls from an\nAS5300 running 12.2(6h) IOS on a NET-5 PRI ISDN line.\nThe calls are destined to mobile phones. A look at the "debug isdn q931"\noutput reveals that the error is always generated exactly 60 seconds after\nthe\nCALL_PROC. A look at "show isdn timers" reveals that *none* of the ISDN\nlayer\n2 or layer 3 timers is set to 60 seconds. The only timers that can actualy\nbe\nchanged (as far as I can see) are T310 and T306, the only relevant timer in\nthis situation is T310. I've tried setting it to 120 seconds (it was set to\n40\nseconds), but the recovery on timer expiry still appears exactly 60 seconds\nafter the CALL_PROC. I'm trying to find out which Q.931 timer is by default\nor\nby standard set to 60 seconds to be able to further debug this.\n\nThe only relevant page on [URL="http://www.cisco.com"]www.cisco.com[/URL] that I was able to find did not\nreally\nhelp me in this situation (as I said, changing T310 does not help and I\nalready have "isdn sending-complete" configured):\n\n[URL]http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080[/URL]\n094487.shtml\n\nHere's what my "show isdn timers" has to say:\n\nISDN Serial2:15 Timers (dsl 2) Switchtype = primary-net5\nISDN Layer 2 values\nK = 7 outstanding I-frames\nN200 = 3 max number of retransmits\nT200 = 1.000 seconds\nT202 = 2.000 seconds\nT203 = 10.000 seconds\nISDN Layer 3 values\nT303 = 4.000 seconds\nT304 = 30.000 seconds\nT305 = 30.000 seconds\nT306 = 30.000 seconds\nT307 = 180.000 seconds\nT308 = 4.000 seconds\nT309 Disabled\nT310 = 40.000 seconds\nT313 = 4.000 seconds\nT316 = 120.000 seconds\nT318 = 4.000 seconds\nT319 = 4.000 seconds\nT322 = 4.000 seconds\nT3OOS = 5.000 seconds\nTGUARD= 8.000 seconds, Expiry = REJECT_CALL\n\nThank in advance for any help you can offer.