Call the Midwife [SEP] original network
beyond; the introduction of gas and air as a form of pain relief and unexploded ordnance in the second series; the Child Migrants Programme and the threat of nuclear warfare (including emergency response guidelines issued by local Civil Defence Corps) in the fourth series; and the effects of thalidomide as well as the introduction of the contraceptive pill in the fifth series.
"Call the Midwife" achieved very high ratings in its first series, making it the most successful new drama series on BBC One since 2001. Since then,
Over Packet (VOP) network to a traditional PSTN network and encapsulating the user information (either ISUP for call setup or SCCP/TCAP for service related signaling) contained in the message for distribution to the Call Control Agent (CCA).
- Internet Call Router (ICR) - Also called the Internet Offload, the ICR is a new network element used in the “post-switch" off-load architecture.
- Switch - An SEP that is equipped to switch end user voice or data calls.