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| -rw-r--r-- | 2021/osmodevcall-ims/osmodevcall-ims.adoc | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/2021/osmodevcall-ims/osmodevcall-ims.adoc b/2021/osmodevcall-ims/osmodevcall-ims.adoc index a66b900..1e160df 100644 --- a/2021/osmodevcall-ims/osmodevcall-ims.adoc +++ b/2021/osmodevcall-ims/osmodevcall-ims.adoc @@ -1,5 +1,5 @@ -High-Level intro IMS, VoLTE, VoWFi -================================== +High-Level intro IMS, VoLTE, VoWiFi +=================================== :author: Harald Welte <laforge@gnumonks.org> :copyright: 2021 by Harald Welte (License: CC-BY-SA) :backend: slidy @@ -37,13 +37,13 @@ What this talk is about == IMS and VoLTE / VoWiFi * VoLTE is a marketing term for IMS over a LTE access network -* VoWiFi is a marketing term for IMS accesss over untrusted networks +* VoWiFi is a marketing term for IMS access over untrusted networks ** *untrusted* basically means not operated by a commercial telecom operator == Basic IMS Core Network * primarily a set of SIP proxies / switches (P-CSCF, I-CSCF, S-CSCF) -* subscriber configuratoin stored in HSS (like in LTE) +* subscriber configuration stored in HSS (like in LTE) * optionally augmented by media gateways ** for interworking with PSTN / ISDN circuit switched interfaces ** for interworking with 2G/3G circuit switched domain @@ -166,7 +166,7 @@ Once ePDG is discovered, IKE Phase 1 is started to set up IPsec SA * LTE extends this with the notion of EPS bearers and TFTs ** think of those like sub-flows within a PDP context ** you connect to one APN but have multiple concurrent EPS bearers to that APN -** each EPS bearer comes with a set of packet filter rules that determie to which bearer a given packet gets mapped. Those packet filter rules are called TFTs. +** each EPS bearer comes with a set of packet filter rules that determine to which bearer a given packet gets mapped. Those packet filter rules are called TFTs. == IMS in VoLTE |