Refer to the exhibit. Highland Park Property Development is integrating a Cisco Unified Communications Manager Express system with the existing PBX via an E1 QSIG trunk. After the initial configuration, no calls can be placed from IP phones to PBX phones. How can this problem be resolved?
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1d20h: ISDN Se3/0:15: Outgoing call id = 0x85F4, dsl 0
1d20h: ISDN Se3/0:15: process_pri_call(): call id 0x85F4, number 35293315, speed 0, call type VOICE, redialed? f, csm call? f, pdata? t
1d20h: callED type/plan overridden by call_decode
ld20h: didt copy oct3a reason: not CALLER_NUMBER_IE
ld20h: building outgoing channel id for call nfas_int is 0 len is 0
ld20h: ISDN se3/0:15: TX -> INFOc sapi = 0 tei =0 ns = 19 nr = 19 i =
0x080200890504038090A31803A983811E0281837009803335323933333135
ld20h: SETUP pd = 8 callref = 00089
ld20h: Bearer capability i = 0x8090A3
ld20h: Channel id i = 0XA98381
ld20h: Progress Ind i =08183 Origination address is non-ISDN
ld20h: called Party Number i = 080, 35293315′, Plan:unknown, Type:unknown
ld20h: ISDN Se3/0:15: RX <- RRr = 0 tei = 0 nr = 20
Id20h: ISDN se3/0:15: RX <- INFOc sapi = 0 tei =0 ns = 19 nr = 20 i = 0x080280895A08028286
ld20h: RELEASE_COMP pd = 8 callref = 08089
ld20h: Cause i = 08286 Channel unacceptable
ld20h: ISDN Se3/0:15: TX -> RRr sapi = 0 tei =0 nr = 20
ld20h: ISDN se3/0:15: CCPRI_Releasecall(): bchan 1, call id 0x85F4, call type VOICE
ld20h: ccPRI_ReleaseChan released b_dsl 0 B_chan 1
ld20h: ISDN Se3/0:15: LIF_EVENT: ces/callid l/0x85F4 CALI__REJECTION
ld20h: ISDN Se3/0:15: LIF_EVENT: ces/callid 1/0x85F4 CALL_CLEARED
ld20h: ISDN Se3/0:15: received CALL_CLEARED call_id 0x85F4
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A.
Increase the ISDN T302 timer to allow more time for call setup.
B.
Add the command isdn negotiate-bchan to the serial interface.
C.
Add the command isdn contiguous-bchan to the serial interface.
D.
Change the channel selection order from descending to ascending.