Signaling service processing platform

Peer NE	Interface	Protocol	Purpose
Standard or Specification
SPS <-> MSC/HLR/SMSC	SIGTRAN	SIGTRAN	Provides IP-based SS7 signaling interworking and bearer.	IETF 2960/4960, IETF 3332, IETF 4666, and IETF 4165
	LSL/HSL/ATM 2M	TDM	Provides E1/T1-based SS7 signaling interworking and bearer.	CCITT Q.701 to Q.709 ITU-T Q.701 to Q.709 Q.2140 Q.2110
SPS <-> U2000	SNMP, MML, SOAP, and NTP	SNMP, MML, SOAP, and NTP	SNMP: used to report alarms to the U2000. MML: used to receive the MML commands sent by the U2000. SOAP: used to receive the SOAP commands sent by the U2000. NTP: used by the SPS and OMU to synchronize time from the U2000 to maintain time consistency.	SNMP v2c SNMP v3 IETF (NTP) RFC 1305 Network Time Protocol SOAP 1.2
SPS <-> IT systems (for example, LSMS)	MML and SOAP	MML and SOAP	Provides a data synchronization interface for the NP, FNR, EIR, and subscription locator function (SLF) services.	-
SPS <-> NTP server	NTP	NTP	Enables the SPS and OMU to synchronize time from the NTP server to maintain time consistency.	ETF RFC 958: Network Time Protocol (NTP)

SIP Interfaces and Protocols

When the SPS functions as a SIP signaling router (SSR), it provides the GM, Mw, Mx, and ISO interfaces and implements the flexible SIP routing, SIP/SIP-I/SIP-T interworking, and TCP/UDP/SCTP link convergence functions. Figure 1 shows the SIP protocol interfaces supported by the SPS.
Figure 1 SIP protocol interfaces supported by the SPS

C4: tandem switch	-
GMSC: gateway mobile switching center	I-CSCF: interrogating call session control function
I-BCF: interconnection border control function	I-SBC: interconnection session border controller
MSC: mobile switching center	MGCF: media gateway control function
P-CSCF: proxy-call session control function	S-CSCF: serving-call session control function
SS: softswitch	-
SSR: SIP signaling router	-

Table 1 lists the SIP protocol interfaces between the SSR and other NEs.

Table 1 SIP protocol interfaces between the SSR and other NEs