laforge has submitted this change. (
https://gerrit.osmocom.org/c/libosmo-abis/+/33282 )
Change subject: trau_sync: Add sync pattern for FA protocol of 3GPP TS 43.045
......................................................................
trau_sync: Add sync pattern for FA protocol of 3GPP TS 43.045
The FA protocol is used to carry (modified) T.30 protocol (Fax G3)
information over synchronous CSD bearers in GSM. It uses 64bit
framing with a well-known sync pattern.
Let's use the trau_sync infrastructure to synchronize to that framing.
Change-Id: Ie2206e120f456d10b4f98d8aeb34fd8a499cb22c
---
M include/osmocom/trau/trau_sync.h
M src/trau/trau_sync.c
2 files changed, 29 insertions(+), 0 deletions(-)
Approvals:
Jenkins Builder: Verified
pespin: Looks good to me, but someone else must approve
laforge: Looks good to me, approved
diff --git a/include/osmocom/trau/trau_sync.h b/include/osmocom/trau/trau_sync.h
index 36388eb..542a329 100644
--- a/include/osmocom/trau/trau_sync.h
+++ b/include/osmocom/trau/trau_sync.h
@@ -15,6 +15,7 @@
OSMO_TRAU_SYNCP_16_ER_CCU,
OSMO_TRAU_SYNCP_64_ER_CCU,
OSMO_TRAU_SYNCP_64_ER_CCU_MCS9,
+ OSMO_TRAU_SYNCP_FA, /* TS 43.045 FA (Fax Adaptation) sync
frame */
};
typedef void (*frame_out_cb_t)(void *user_data, const ubit_t *bits, unsigned
int num_bits);
diff --git a/src/trau/trau_sync.c b/src/trau/trau_sync.c
index 60bfad7..e3b458a 100644
--- a/src/trau/trau_sync.c
+++ b/src/trau/trau_sync.c
@@ -274,6 +274,19 @@
},
.byte_len = 160,
},
+ [OSMO_TRAU_SYNCP_FA] = {
+ /* See Section 5.2.2.1 of 3GPP TS 43.045 */
+ .name = "FA",
+ .byte_pattern = {
+ 0x3E, 0x37, 0x50, 0x96,
+ 0xC1, 0xC8, 0xAF, 0x69,
+ },
+ .byte_mask = {
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ },
+ .byte_len = 8,
+ },
};
static void expand_sync_pattern(struct sync_pattern *pat)
--
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Gerrit-Project: libosmo-abis
Gerrit-Branch: master
Gerrit-Change-Id: Ie2206e120f456d10b4f98d8aeb34fd8a499cb22c
Gerrit-Change-Number: 33282
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-Reviewer: pespin <[email protected]>
Gerrit-MessageType: merged
