nal responsibility, assess- SIP trunk deployments, 192 ing, 253 Cisco UCM H.323 user community participation, 255 Interconnect, 202-204 planning migration to SIP trunks, 244 Cisco UCM SIP to AT&T cost analysis, 245 FlexReach SIP trunk, 192-197 emergency call policy, 246 contact center SIP trunk inter- future new services, evaluating, 247 connect, 206-211 network design implications, CUCM to Verizon SIP trunk, assessing, 246 197-202 production user community phases, defining, 246-247 feature trends, 24-28 security implications, evaluating, 248 sharing SIP trunks across enterprise, 204-206 traffic volumes, assessing, 246 SMB SIP trunks, 212-223 port spanning, 26 PSTN gateway connection model, port/line charges, 49 82-83 porting numbers to SIP trunks, 105 PSTN TDM gateway failover, 137 ports, cost of, 48 320 QA (quality assurance) session management issues, 162-168 QA (quality assurance), 184-185 support issues, 182-183 QoS, 127 systems specification issues, congestion management, 128 delay, 128 echo, 128 jitter, 128 remarking, configuring, 240 SBC (Session Border Controllers). traffic marking, 111, 127 See also SBC vendors quality control deploying, best practices, 260-261 certification, 185 SIP trunks for Enterprise networks QA, 184-185 application interconnection SBC, 78-79 interconnecting SBC, 76 SIP trunks for SP networks real-time billing servers, SIP trunking edge SBC, 58-59 for SP networks, 61 peering SBC, 71-73 recording services, 30 SBC vendors redundancy, 131 technical requirements best practices, 261 certification issues, 185 on border elements, 132 QA issues, 184-185 PSTN TDM gateway failover, 137 technical requirements for SIP registration, 122-123 deployment regulatory design considerations, 102 delivery, 181-182 RFPs (Request for Proposal), 35 demarcation, 171-173 preparing for SBC documentation and training, delivery issues, 181-182 demarcation issues, 171-173 internetworking support, 169-171 documentation and training issues, 182 operations management, 176-178 internetworking support issues, 169-17