diff --git a/src/encoding.cpp b/src/encoding.cpp
index 7b711b8..279bbfe 100644
--- a/src/encoding.cpp
+++ b/src/encoding.cpp
@@ -44,6 +44,21 @@
 #define set_H(bv) set_x(bv, H)
 
 /* { 0 | 1 < TIMING_ADVANCE_INDEX : bit (4) > } */
+static inline int write_ta_index(bitvec *dest, int8_t tai)
+{
+	int rc;
+
+	if (tai < 0) /* No TIMING_ADVANCE_INDEX: */
+		set_0(dest);
+
+	/* TIMING_ADVANCE_INDEX: */
+	set_1(dest);
+	rc = bitvec_set_u64(dest, tai, 4, false);
+	check(rc);
+
+	return 0;
+}
+
 static inline bool write_tai(bitvec *dest, unsigned& wp, int8_t tai)
 {
 	if (tai < 0) { /* No TIMING_ADVANCE_INDEX: */
@@ -159,52 +174,58 @@
 	return 0;
 }
 
-static int write_ia_rest_downlink(
-	gprs_rlcmac_dl_tbf *tbf,
-	bitvec * dest, unsigned& wp,
-	uint8_t polling, bool ta_valid, uint32_t fn,
-	uint8_t alpha, uint8_t gamma, int8_t ta_idx)
+/* 3GPP TS 44.018 §10.5.2.16 IA Rest Octets ::= Packet Downlink Assignment */
+static inline int write_ia_rest_downlink(const gprs_rlcmac_dl_tbf *tbf, bitvec *dest,
+					 bool polling, bool ta_valid, uint32_t fn,
+					 uint8_t alpha, uint8_t gamma, int8_t ta_idx)
 {
-	if (!tbf) {
-		LOGP(DRLCMACDL, LOGL_ERROR,
-			"Cannot encode DL IMMEDIATE ASSIGNMENT without TBF\n");
-		return -EINVAL;
-	}
-	// GSM 04.08 10.5.2.16 IA Rest Octets
-	bitvec_write_field(dest, &wp, 3, 2);   // "HH"
-	bitvec_write_field(dest, &wp, 1, 2);   // "01" Packet Downlink Assignment
-	bitvec_write_field(dest, &wp,tbf->tlli(),32); // TLLI
-	bitvec_write_field(dest, &wp,0x1,1);   // switch TFI   : on
-	bitvec_write_field(dest, &wp,tbf->tfi(),5);   // TFI
-	bitvec_write_field(dest, &wp,0x0,1);   // RLC acknowledged mode
-	if (alpha) {
-		bitvec_write_field(dest, &wp,0x1,1);   // ALPHA = present
-		bitvec_write_field(dest, &wp,alpha,4);   // ALPHA
-	} else {
-		bitvec_write_field(dest, &wp,0x0,1);   // ALPHA = not present
-	}
-	bitvec_write_field(dest, &wp,gamma,5);   // GAMMA power control parameter
-	bitvec_write_field(dest, &wp,polling,1);   // Polling Bit
-	bitvec_write_field(dest, &wp, ta_valid, 1); // N. B: NOT related to TAI!
-	write_tai(dest, wp, ta_idx);
+	int rc;
+
+	set_H(dest); set_H(dest);
+	set_0(dest); set_1(dest); /* 00 Packet Downlink Assignment */
+
+	rc = bitvec_set_u64(dest, tbf->tlli(), 32, false); /* TLLI */
+	check(rc);
+
+	set_1(dest);
+	rc = bitvec_set_u64(dest, tbf->tfi(), 5, false);   /* TFI_ASSIGNMENT */
+	check(rc);
+
+	/* RLC acknowledged mode */
+	set_0(dest); /* RLC_MODE */
+
+	rc = write_alpha_gamma(dest, alpha, gamma);        /* ALPHA and GAMMA */
+	check(rc);
+
+	rc = bitvec_set_bit(dest, (bit_value)polling); /* POLLING */
+	check(rc);
+
+	/* N. B: NOT related to TAI! */
+	rc = bitvec_set_bit(dest, (bit_value)ta_valid); /* TA_VALID */
+	check(rc);
+
+	rc = write_ta_index(dest, ta_idx);
+	check(rc);
+
 	if (polling) {
-		bitvec_write_field(dest, &wp,0x1,1);   // TBF Starting TIME present
-		bitvec_write_field(dest, &wp,(fn / (26 * 51)) % 32,5); // T1'
-		bitvec_write_field(dest, &wp,fn % 51,6);               // T3
-		bitvec_write_field(dest, &wp,fn % 26,5);               // T2
-	} else {
-		bitvec_write_field(dest, &wp,0x0,1);   // TBF Starting TIME present
-	}
-	bitvec_write_field(dest, &wp,0x0,1);   // P0 not present
-	//		bitvec_write_field(dest, &wp,0x1,1);   // P0 not present
-	//		bitvec_write_field(dest, &wp,,0xb,4);
+		set_1(dest);
+		rc = write_tbf_start_time(dest, fn);	/* TBF_STARTING_TIME */
+		check(rc);
+	} else
+		set_0(dest);	                     /* No TBF_STARTING_TIME */
+
+	set_0(dest); /* No P0 nor PR_MODE */
+
 	if (tbf->is_egprs_enabled()) {
-		/* see GMS 44.018, 10.5.2.16 */
-		bitvec_write_field(dest, &wp, 1, 1);  // "H"
-		write_ws(dest, &wp, tbf->window_size()); // EGPRS Window Size
-		bitvec_write_field(dest, &wp, 0x0, 2);    // LINK_QUALITY_MEASUREMENT_MODE
-		bitvec_write_field(dest, &wp, 0, 1);      // BEP_PERIOD2 not present
-	}
+		set_H(dest);
+		rc = bitvec_set_u64(dest, enc_ws(tbf->window_size()), 5, false); /* EGPRS Window Size */
+		check(rc);
+
+		/* The mobile station shall not report measurements: (see 3GPP TS 44.060 Table 11.2.7.1) */
+		set_0(dest); set_0(dest); /* LINK_QUALITY_MEASUREMENT_MODE */
+		set_1(dest);              /* No BEP_PERIOD2 */
+	} else
+		set_L(dest);              /* No Additions for Rel-6 */
 
 	return 0;
 }
@@ -460,11 +481,15 @@
 
 	plen = wp / 8;
 
-	if (downlink)
-		rc = write_ia_rest_downlink(as_dl_tbf(tbf), dest, wp,
-					    polling, gsm48_ta_is_valid(ta), fn,
-			alpha, gamma, ta_idx);
-	else if (((burst_type == GSM_L1_BURST_TYPE_ACCESS_1) ||
+	if (downlink) {
+		if (!as_dl_tbf(tbf)) {
+			LOGP(DRLCMACDL, LOGL_ERROR, "Cannot encode DL IMMEDIATE ASSIGNMENT without TBF\n");
+			return -EINVAL;
+		}
+		dest->cur_bit = wp;
+		rc = write_ia_rest_downlink(as_dl_tbf(tbf), dest, polling, gsm48_ta_is_valid(ta), fn,
+					    alpha, gamma, ta_idx);
+	} else if (((burst_type == GSM_L1_BURST_TYPE_ACCESS_1) ||
 		  (burst_type == GSM_L1_BURST_TYPE_ACCESS_2))) {
 		dest->cur_bit = wp;
 		rc = write_ia_rest_egprs_uplink(as_ul_tbf(tbf), dest, usf, fn, alpha, gamma, ta_idx, burst_type, ra);
diff --git a/tests/tbf/TbfTest.err b/tests/tbf/TbfTest.err
index 57f7bd9..d032a0f 100644
--- a/tests/tbf/TbfTest.err
+++ b/tests/tbf/TbfTest.err
@@ -625,7 +625,7 @@
 TBF(TFI=0 TLLI=0xc0000000 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=0 TLLI=0xc0000000 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 08 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 08 00 0f 8b 2b 2b 2b 
 TBF(TFI=0 TLLI=0xc0000000 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -651,7 +651,7 @@
 TBF(TFI=1 TLLI=0xc0000001 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=1 TLLI=0xc0000001 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 18 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 18 40 0f 8b 2b 2b 2b 
 TBF(TFI=1 TLLI=0xc0000001 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -677,7 +677,7 @@
 TBF(TFI=2 TLLI=0xc0000002 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=2 TLLI=0xc0000002 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 28 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 28 80 0f 8b 2b 2b 2b 
 TBF(TFI=2 TLLI=0xc0000002 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -703,7 +703,7 @@
 TBF(TFI=3 TLLI=0xc0000003 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=3 TLLI=0xc0000003 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 38 c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 38 c0 0f 8b 2b 2b 2b 
 TBF(TFI=3 TLLI=0xc0000003 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -729,7 +729,7 @@
 TBF(TFI=4 TLLI=0xc0000004 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=4 TLLI=0xc0000004 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 49 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 49 00 0f 8b 2b 2b 2b 
 TBF(TFI=4 TLLI=0xc0000004 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -755,7 +755,7 @@
 TBF(TFI=5 TLLI=0xc0000005 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=5 TLLI=0xc0000005 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 59 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 59 40 0f 8b 2b 2b 2b 
 TBF(TFI=5 TLLI=0xc0000005 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -781,7 +781,7 @@
 TBF(TFI=6 TLLI=0xc0000006 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=6 TLLI=0xc0000006 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 69 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 69 80 0f 8b 2b 2b 2b 
 TBF(TFI=6 TLLI=0xc0000006 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -807,7 +807,7 @@
 TBF(TFI=7 TLLI=0xc0000007 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=7 TLLI=0xc0000007 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 79 c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 79 c0 0f 8b 2b 2b 2b 
 TBF(TFI=7 TLLI=0xc0000007 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -833,7 +833,7 @@
 TBF(TFI=8 TLLI=0xc0000008 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=8 TLLI=0xc0000008 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 8a 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 8a 00 0f 8b 2b 2b 2b 
 TBF(TFI=8 TLLI=0xc0000008 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -859,7 +859,7 @@
 TBF(TFI=9 TLLI=0xc0000009 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=9 TLLI=0xc0000009 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 9a 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 9a 40 0f 8b 2b 2b 2b 
 TBF(TFI=9 TLLI=0xc0000009 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -885,7 +885,7 @@
 TBF(TFI=10 TLLI=0xc000000a DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=10 TLLI=0xc000000a DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 aa 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 aa 80 0f 8b 2b 2b 2b 
 TBF(TFI=10 TLLI=0xc000000a DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -911,7 +911,7 @@
 TBF(TFI=11 TLLI=0xc000000b DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=11 TLLI=0xc000000b DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 ba c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 ba c0 0f 8b 2b 2b 2b 
 TBF(TFI=11 TLLI=0xc000000b DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -937,7 +937,7 @@
 TBF(TFI=12 TLLI=0xc000000c DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=12 TLLI=0xc000000c DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 cb 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 cb 00 0f 8b 2b 2b 2b 
 TBF(TFI=12 TLLI=0xc000000c DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -963,7 +963,7 @@
 TBF(TFI=13 TLLI=0xc000000d DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=13 TLLI=0xc000000d DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 db 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 db 40 0f 8b 2b 2b 2b 
 TBF(TFI=13 TLLI=0xc000000d DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -989,7 +989,7 @@
 TBF(TFI=14 TLLI=0xc000000e DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=14 TLLI=0xc000000e DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 eb 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 eb 80 0f 8b 2b 2b 2b 
 TBF(TFI=14 TLLI=0xc000000e DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1015,7 +1015,7 @@
 TBF(TFI=15 TLLI=0xc000000f DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=15 TLLI=0xc000000f DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 fb c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 00 fb c0 0f 8b 2b 2b 2b 
 TBF(TFI=15 TLLI=0xc000000f DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1041,7 +1041,7 @@
 TBF(TFI=16 TLLI=0xc0000010 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=16 TLLI=0xc0000010 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 0c 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 0c 00 0f 8b 2b 2b 2b 
 TBF(TFI=16 TLLI=0xc0000010 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1067,7 +1067,7 @@
 TBF(TFI=17 TLLI=0xc0000011 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=17 TLLI=0xc0000011 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 1c 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 1c 40 0f 8b 2b 2b 2b 
 TBF(TFI=17 TLLI=0xc0000011 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1093,7 +1093,7 @@
 TBF(TFI=18 TLLI=0xc0000012 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=18 TLLI=0xc0000012 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 2c 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 2c 80 0f 8b 2b 2b 2b 
 TBF(TFI=18 TLLI=0xc0000012 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1119,7 +1119,7 @@
 TBF(TFI=19 TLLI=0xc0000013 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=19 TLLI=0xc0000013 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 3c c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 3c c0 0f 8b 2b 2b 2b 
 TBF(TFI=19 TLLI=0xc0000013 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1145,7 +1145,7 @@
 TBF(TFI=20 TLLI=0xc0000014 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=20 TLLI=0xc0000014 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 4d 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 4d 00 0f 8b 2b 2b 2b 
 TBF(TFI=20 TLLI=0xc0000014 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1171,7 +1171,7 @@
 TBF(TFI=21 TLLI=0xc0000015 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=21 TLLI=0xc0000015 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 5d 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 5d 40 0f 8b 2b 2b 2b 
 TBF(TFI=21 TLLI=0xc0000015 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1197,7 +1197,7 @@
 TBF(TFI=22 TLLI=0xc0000016 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=22 TLLI=0xc0000016 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 6d 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 32 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 6d 80 0f 8b 2b 2b 2b 
 TBF(TFI=22 TLLI=0xc0000016 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1223,7 +1223,7 @@
 TBF(TFI=23 TLLI=0xc0000017 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=23 TLLI=0xc0000017 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 7d c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 33 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 7d c0 0f 8b 2b 2b 2b 
 TBF(TFI=23 TLLI=0xc0000017 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1249,7 +1249,7 @@
 TBF(TFI=24 TLLI=0xc0000018 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=24 TLLI=0xc0000018 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 8e 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 34 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 8e 00 0f 8b 2b 2b 2b 
 TBF(TFI=24 TLLI=0xc0000018 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1275,7 +1275,7 @@
 TBF(TFI=25 TLLI=0xc0000019 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=25 TLLI=0xc0000019 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 9e 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 35 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 9e 40 0f 8b 2b 2b 2b 
 TBF(TFI=25 TLLI=0xc0000019 DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1301,7 +1301,7 @@
 TBF(TFI=26 TLLI=0xc000001a DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=26 TLLI=0xc000001a DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ae 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ae 80 0f 8b 2b 2b 2b 
 TBF(TFI=26 TLLI=0xc000001a DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1327,7 +1327,7 @@
 TBF(TFI=27 TLLI=0xc000001b DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=27 TLLI=0xc000001b DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 be c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 37 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 be c0 0f 8b 2b 2b 2b 
 TBF(TFI=27 TLLI=0xc000001b DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1353,7 +1353,7 @@
 TBF(TFI=28 TLLI=0xc000001c DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=28 TLLI=0xc000001c DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 cf 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 38 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 cf 00 0f 8b 2b 2b 2b 
 TBF(TFI=28 TLLI=0xc000001c DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1379,7 +1379,7 @@
 TBF(TFI=29 TLLI=0xc000001d DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=29 TLLI=0xc000001d DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 df 40 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 39 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 df 40 0f 8b 2b 2b 2b 
 TBF(TFI=29 TLLI=0xc000001d DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1405,7 +1405,7 @@
 TBF(TFI=30 TLLI=0xc000001e DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=30 TLLI=0xc000001e DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ef 80 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 30 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ef 80 0f 8b 2b 2b 2b 
 TBF(TFI=30 TLLI=0xc000001e DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1431,7 +1431,7 @@
 TBF(TFI=31 TLLI=0xc000001f DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=31 TLLI=0xc000001f DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ff c0 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 31 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 00 00 01 ff c0 0f 8b 2b 2b 2b 
 TBF(TFI=31 TLLI=0xc000001f DIR=DL STATE=ASSIGN) appending 256 bytes
 ********** DL-TBF starts here **********
 Allocating DL TBF: MS_CLASS=45/0
@@ -1465,7 +1465,7 @@
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=220 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=34 35 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 01 23 45 68 00 03 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=34 35 36 2d 06 3f 30 0c 00 00 7d 80 00 1c 00 dc 01 23 45 68 00 0f 8b 2b 2b 2b 
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) appending 19 bytes
 Modifying MS object, TLLI = 0xc0123456, TA 220 -> 0
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) appending 19 bytes
@@ -1494,7 +1494,7 @@
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=4 TA=0 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=34 35 36 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 01 23 45 68 00 23 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=34 35 36 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 01 23 45 68 00 2f 8b 2b 2b 2b 
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) appending 19 bytes
 TBF(TFI=0 TLLI=0xc0123456 DIR=DL STATE=ASSIGN) downlink (V(A)==0 .. V(S)==0)
 - Sending new block at BSN 0, CS=CS-1
@@ -1608,7 +1608,7 @@
 TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) TX: START Immediate Assignment Downlink (PCH)
  - TRX=0 (0) TS=7 TA=7 pollFN=-1
-Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=33 34 34 2d 06 3f 30 0f 00 00 7d 80 00 07 00 df 12 23 34 48 00 23 2b 2b 2b 2b 
+Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=33 34 34 2d 06 3f 30 0f 00 00 7d 80 00 07 00 df 12 23 34 48 00 2f 8b 2b 2b 2b 
 TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) appending 4 bytes
 Sending data request: trx=0 ts=7 sapi=5 arfcn=0 fn=2654218 block=8 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 
 MS requests UL TBF on RACH, so we provide one: ra=0x73 Fn=2654167 qta=31 is_11bit=0: