Cisco Cisco Packet Data Interworking Function (PDIF) Prospecto
Call Control Profile Configuration Mode
▀ csfb
▄ Cisco ASR 5x00 Command Line Interface Reference
1824
csfb
Configures circuit-switched fallback options. CSFB is the mechanism to move a subscriber from LTE to a legacy
technology to obtain circuit switched voice or short message.
technology to obtain circuit switched voice or short message.
Product
MME
Privilege
Administrator
Mode
Exec > Global Configuration > Call Control Profile Configuration
configure > call-control-profile profile_name
Entering the above command sequence results in the following prompt:
[local]host_name(config-call-control-profile-profile_name)#
Syntax
csfb { policy { not-allowed | not-preferred | sms-only | suppress-call-reject } | sms-
only }
only }
remove csfb { policy | sms-only }
remove csfb { policy | sms-only }
sms-only
: Removes the SMS-only restriction allowing the UE to request voice and short message service
(SMS) support for circuit-switched fallback (CSFB).
policy
: Removes the configured policy.
policy { not-allowed | not-preferred | sms-only | suppress-call-reject }
not-allowed
: Specifies that the CSFB function is not allowed for both voice and SMS.
not-preferred
: Specifies that the MME returns a “not-preferred” response for CSFB services. The MME
does not enforce this and a voice centric is allowed to make CSFB calls on a not-preferred case if it chooses
to do so.
to do so.
sms-only
: Specifies that the CSFB function only supports SMS.
suppress-call-reject
: Configures the MME to ignore a paging request for an SMS-only CS call for an
attached UE and suppress the paging reject. This allows the MME to process SGs CS call SMS-only paging
requests for Ultra Card users where the same MSISDN is allocated to different IMSIs. By default the MME
will reject the paging request with a cause:
SGSAP_SGS_CAUSE_MOBILE_TERMINATING_CSFB_REJECTED_BY_USER
requests for Ultra Card users where the same MSISDN is allocated to different IMSIs. By default the MME
will reject the paging request with a cause:
SGSAP_SGS_CAUSE_MOBILE_TERMINATING_CSFB_REJECTED_BY_USER
sms-only
Specifies that the circuit-switched fallback function only supports SMS.
Important:
This is a legacy keyword that remains to support earlier versions of the code. It operates identically
to the
policy sms-only
keyword.