Specifications

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Cisco 1751 Router Software Configuration Guide
OL-1070-01
Sample Display
The following output shows that a ring is detected and that the router waits for the ringing to stop before
accepting the call:
router# debug vpm signal
ssm_process_event: [1/0, 0.2, 15] fxols_onhook_ringing
ssm_process_event: [1/0, 0.7, 19] fxols_ringing_not
ssm_process_event: [1/0, 0.3, 6]
ssm_process_event: [1/0, 0.3, 19] fxols_offhook_clear
The following output shows that the call is connected:
ssm_process_event: [1/0, 0.3, 4] fxols_offhook_proc
ssm_process_event: [1/0, 0.3, 8] fxols_proc_voice
ssm_process_event: [1/0, 0.3, 5] fxols_offhook_connect
The following output confirms a disconnect from the switch and release with higher layer code:
ssm_process_event: [1/0, 0.4, 27] fxols_offhook_disc
ssm_process_event: [1/0, 0.4, 33] fxols_disc_confirm
ssm_process_event: [1/0, 0.4, 3] fxols_offhook_release
debug vpm spi
Use the debug vpm spi EXEC command to trace how the virtual voice-port module (VPM) serial
peripheral interface (SPI) interfaces with the call control application programming interface (API). Use
the no form of this command to disable debugging output.
[no] debug vpm spi
Usage Guidelines
The debug vpm spi EXEC command traces how the virtual voice-port module SPI interfaces with the
call control API. This debug command displays information about how each network indication and
application request is handled.
This debug level shows the internal workings of the voice telephony call state machine.
Sample Display
The following output shows that the call is accepted and presented to a higher layer code:
router# debug vpm spi
sp_set_sig_state: [1/0] packet_len=14 channel_id=129 packet_id=39 state=0xC timestamp=0x0
vcsm_process_event: [1/0, 0.5, 1] act_up_setup_ind