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CISCO Router--Nortel E1 connectivity

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kanwalx

MIS
Dec 20, 2010
19
PK
Hi all , Need kind help of yours.I have following setup configured (CISCO router 29XX series)


Nortel PBX(rls5.5)---E1-->CISCO Router----->CISCO Router(FXO/FXX Port)--- Analog Tel Set

i am having problem of dropping call exactly after 2 minutes and 45 second. Analog set located at remote site use 9 to access PSTN trunk installed at Nortel PBX and then it dials out..These calls are dropping after 2 min. 45 seconds...I checked E1 route TFD it is disable(set to 0).

The CISCO logs capture shows following error

Cause No. 102 - recovery on timer expiry.
This cause indicates that a procedure has been initiated by the expiration of a timer in association with error handling procedures.

What it means:
This is seen in situations where ACO (Alternate Call Offering) is being used. With this type of call pre-emption, the Telco switch operates a timer. For example, when an analog call is placed to a Netopia router that has two B Data Channels in place, the router relinquishes the second channel, but if it doesn't happen in the time allotted by the switch programming, the call will not ring through and will be discarded by the switch.




ISDN Serial0/2/0:15 Timers (dsl 0) Switchtype = primary-qsig

ISDN Layer 2 values

K = 7 outstanding I-frames

N200 = 3 max number of retransmits

T200 = 1.000 seconds

T203 = 10.000 seconds

ISDN Layer 3 values

T302 = 15.000 seconds

T301 = 300.000 seconds

T303 = 6.000 seconds

T304 = 120.000 seconds

T305 = 30.000 seconds

T306 = 30.000 seconds

T307 = 180.000 seconds

T308 = 6.000 seconds

T309 Disabled

T310 = 120.000 seconds

T313 = 6.000 seconds

T314 = 6.000 seconds

T316 = 120.000 seconds

T318 = 4.000 seconds

T319 = 4.000 seconds

T322 = 4.000 seconds

T3OOS = 5.000 seconds

Please guide how can i resolve this problem? Further i cannot get dial tone (after 9) at analog set connected with CISCO router analog port...DLTN is yes at nortel PBX.

Regards

 
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